./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/product-lines/email_spec9_product21.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_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/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_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/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_8fb2227e-a18d-4c67-9add-6699f45f7770/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 f4fee54ccb193d38705f292ec1df682c5f160e2b5ba09e341cb9a12b4e6b2606 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:37:40,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:37:40,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:37:40,435 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:37:40,436 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:37:40,441 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:37:40,443 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:37:40,447 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:37:40,450 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:37:40,458 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:37:40,459 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:37:40,461 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:37:40,462 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:37:40,465 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:37:40,468 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:37:40,473 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:37:40,475 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:37:40,476 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:37:40,479 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:37:40,489 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:37:40,491 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:37:40,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:37:40,497 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:37:40,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:37:40,503 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:37:40,503 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:37:40,504 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:37:40,506 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:37:40,507 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:37:40,509 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:37:40,510 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:37:40,511 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:37:40,513 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:37:40,515 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:37:40,516 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:37:40,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:37:40,518 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:37:40,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:37:40,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:37:40,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:37:40,520 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:37:40,521 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-07 01:37:40,566 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:37:40,566 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:37:40,567 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:37:40,567 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:37:40,568 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:37:40,568 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:37:40,568 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-07 01:37:40,568 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:37:40,569 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:37:40,569 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-07 01:37:40,569 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-07 01:37:40,569 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:37:40,570 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-07 01:37:40,570 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-07 01:37:40,570 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-07 01:37:40,571 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:37:40,571 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:37:40,571 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 01:37:40,572 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:37:40,572 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:37:40,572 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:37:40,572 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:37:40,573 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:37:40,573 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:37:40,573 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:37:40,573 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:37:40,574 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:37:40,574 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:37:40,574 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:37:40,575 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:37:40,575 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:40,575 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:37:40,575 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:37:40,576 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:37:40,576 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-07 01:37:40,576 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 01:37:40,576 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:37:40,577 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:37:40,577 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:37:40,577 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_8fb2227e-a18d-4c67-9add-6699f45f7770/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4fee54ccb193d38705f292ec1df682c5f160e2b5ba09e341cb9a12b4e6b2606 [2021-11-07 01:37:40,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:37:40,828 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:37:40,831 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:37:40,833 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:37:40,833 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:37:40,834 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product21.cil.c [2021-11-07 01:37:40,907 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data/74e4435a3/c6bd0ed2cd29486abac5187f6a9bfd38/FLAG462d9c8ae [2021-11-07 01:37:41,590 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:37:41,591 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/sv-benchmarks/c/product-lines/email_spec9_product21.cil.c [2021-11-07 01:37:41,620 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data/74e4435a3/c6bd0ed2cd29486abac5187f6a9bfd38/FLAG462d9c8ae [2021-11-07 01:37:41,822 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data/74e4435a3/c6bd0ed2cd29486abac5187f6a9bfd38 [2021-11-07 01:37:41,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:37:41,826 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:37:41,827 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:41,827 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:37:41,832 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:37:41,833 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:41" (1/1) ... [2021-11-07 01:37:41,834 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1ad3156a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:41, skipping insertion in model container [2021-11-07 01:37:41,835 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:41" (1/1) ... [2021-11-07 01:37:41,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:37:41,920 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:42,223 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_8fb2227e-a18d-4c67-9add-6699f45f7770/sv-benchmarks/c/product-lines/email_spec9_product21.cil.c[10263,10276] [2021-11-07 01:37:42,471 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:42,488 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 01:37:42,489 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@4085f731 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:42, skipping insertion in model container [2021-11-07 01:37:42,489 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:42,489 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-07 01:37:42,492 INFO L168 Benchmark]: Toolchain (without parser) took 664.83 ms. Allocated memory is still 102.8 MB. Free memory was 67.6 MB in the beginning and 64.8 MB in the end (delta: 2.8 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:42,492 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory is still 57.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-07 01:37:42,493 INFO L168 Benchmark]: CACSL2BoogieTranslator took 662.16 ms. Allocated memory is still 102.8 MB. Free memory was 67.4 MB in the beginning and 64.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-07 01:37:42,495 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 102.8 MB. Free memory is still 57.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 662.16 ms. Allocated memory is still 102.8 MB. Free memory was 67.4 MB in the beginning and 64.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 2625]: 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_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/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_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/config/TaipanReach.xml -i ../../sv-benchmarks/c/product-lines/email_spec9_product21.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/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_8fb2227e-a18d-4c67-9add-6699f45f7770/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 f4fee54ccb193d38705f292ec1df682c5f160e2b5ba09e341cb9a12b4e6b2606 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 01:37:44,802 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 01:37:44,806 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 01:37:44,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 01:37:44,860 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 01:37:44,865 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 01:37:44,867 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 01:37:44,872 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 01:37:44,875 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 01:37:44,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 01:37:44,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 01:37:44,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 01:37:44,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 01:37:44,893 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 01:37:44,895 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 01:37:44,899 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 01:37:44,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 01:37:44,902 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 01:37:44,904 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 01:37:44,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 01:37:44,914 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 01:37:44,916 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 01:37:44,919 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 01:37:44,921 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 01:37:44,927 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 01:37:44,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 01:37:44,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 01:37:44,929 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 01:37:44,930 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 01:37:44,931 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 01:37:44,931 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 01:37:44,932 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 01:37:44,933 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 01:37:44,934 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 01:37:44,935 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 01:37:44,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 01:37:44,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 01:37:44,937 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 01:37:44,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 01:37:44,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 01:37:44,939 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 01:37:44,940 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-07 01:37:44,969 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 01:37:44,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 01:37:44,970 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-07 01:37:44,971 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-07 01:37:44,971 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-07 01:37:44,971 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-07 01:37:44,971 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-07 01:37:44,971 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-07 01:37:44,971 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-07 01:37:44,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 01:37:44,974 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 01:37:44,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 01:37:44,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 01:37:44,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 01:37:44,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 01:37:44,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 01:37:44,975 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-07 01:37:44,975 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-07 01:37:44,976 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-07 01:37:44,976 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 01:37:44,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 01:37:44,976 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 01:37:44,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 01:37:44,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 01:37:44,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 01:37:44,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 01:37:44,977 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:44,977 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 01:37:44,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 01:37:44,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 01:37:44,978 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-07 01:37:44,978 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-07 01:37:44,978 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 01:37:44,978 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 01:37:44,979 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-07 01:37:44,979 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_8fb2227e-a18d-4c67-9add-6699f45f7770/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f4fee54ccb193d38705f292ec1df682c5f160e2b5ba09e341cb9a12b4e6b2606 [2021-11-07 01:37:45,404 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 01:37:45,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 01:37:45,428 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 01:37:45,430 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 01:37:45,430 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 01:37:45,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/../../sv-benchmarks/c/product-lines/email_spec9_product21.cil.c [2021-11-07 01:37:45,494 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data/313015ee0/56732074c43f4779ab55f8c7dd922b5d/FLAG1e890aa7e [2021-11-07 01:37:46,116 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 01:37:46,117 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/sv-benchmarks/c/product-lines/email_spec9_product21.cil.c [2021-11-07 01:37:46,148 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data/313015ee0/56732074c43f4779ab55f8c7dd922b5d/FLAG1e890aa7e [2021-11-07 01:37:46,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/data/313015ee0/56732074c43f4779ab55f8c7dd922b5d [2021-11-07 01:37:46,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 01:37:46,346 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 01:37:46,347 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:46,347 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 01:37:46,364 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 01:37:46,365 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:46" (1/1) ... [2021-11-07 01:37:46,366 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f2bbce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:46, skipping insertion in model container [2021-11-07 01:37:46,366 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:37:46" (1/1) ... [2021-11-07 01:37:46,374 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 01:37:46,435 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:46,888 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_8fb2227e-a18d-4c67-9add-6699f45f7770/sv-benchmarks/c/product-lines/email_spec9_product21.cil.c[10263,10276] [2021-11-07 01:37:47,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:47,263 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-07 01:37:47,291 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 01:37:47,307 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_8fb2227e-a18d-4c67-9add-6699f45f7770/sv-benchmarks/c/product-lines/email_spec9_product21.cil.c[10263,10276] [2021-11-07 01:37:47,388 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:47,398 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 01:37:47,438 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_8fb2227e-a18d-4c67-9add-6699f45f7770/sv-benchmarks/c/product-lines/email_spec9_product21.cil.c[10263,10276] [2021-11-07 01:37:47,524 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 01:37:47,577 INFO L208 MainTranslator]: Completed translation [2021-11-07 01:37:47,578 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47 WrapperNode [2021-11-07 01:37:47,578 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 01:37:47,579 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:47,580 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 01:37:47,580 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 01:37:47,587 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,786 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 01:37:47,788 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 01:37:47,788 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 01:37:47,788 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 01:37:47,797 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,797 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,825 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,825 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,910 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,963 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,986 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 01:37:47,987 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 01:37:47,987 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 01:37:47,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 01:37:47,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (1/1) ... [2021-11-07 01:37:47,995 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 01:37:48,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/z3 [2021-11-07 01:37:48,015 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 01:37:48,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 01:37:48,053 INFO L130 BoogieDeclarations]: Found specification of procedure puts [2021-11-07 01:37:48,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 01:37:48,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-07 01:37:48,053 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 01:37:48,053 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 01:37:53,786 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 01:37:53,787 INFO L299 CfgBuilder]: Removed 649 assume(true) statements. [2021-11-07 01:37:53,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:53 BoogieIcfgContainer [2021-11-07 01:37:53,791 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 01:37:53,795 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 01:37:53,795 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 01:37:53,798 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 01:37:53,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:37:46" (1/3) ... [2021-11-07 01:37:53,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146edc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:53, skipping insertion in model container [2021-11-07 01:37:53,799 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:37:47" (2/3) ... [2021-11-07 01:37:53,799 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@146edc98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:37:53, skipping insertion in model container [2021-11-07 01:37:53,800 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:37:53" (3/3) ... [2021-11-07 01:37:53,801 INFO L111 eAbstractionObserver]: Analyzing ICFG email_spec9_product21.cil.c [2021-11-07 01:37:53,806 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 01:37:53,806 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-11-07 01:37:53,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 01:37:53,867 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 01:37:53,867 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-11-07 01:37:53,905 INFO L276 IsEmpty]: Start isEmpty. Operand has 962 states, 955 states have (on average 1.7340314136125654) internal successors, (1656), 961 states have internal predecessors, (1656), 0 states have call successors, (0), 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 01:37:53,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 01:37:53,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:53,920 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] [2021-11-07 01:37:53,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:37:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:53,927 INFO L85 PathProgramCache]: Analyzing trace with hash -517743260, now seen corresponding path program 1 times [2021-11-07 01:37:53,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:53,941 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [391722343] [2021-11-07 01:37:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:53,943 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:53,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:53,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:53,952 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-07 01:37:54,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:54,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-07 01:37:54,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:54,589 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 01:37:54,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:54,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:54,697 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:54,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [391722343] [2021-11-07 01:37:54,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [391722343] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:54,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:54,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-07 01:37:54,700 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596338275] [2021-11-07 01:37:54,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-07 01:37:54,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:54,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-07 01:37:54,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-07 01:37:54,725 INFO L87 Difference]: Start difference. First operand has 962 states, 955 states have (on average 1.7340314136125654) internal successors, (1656), 961 states have internal predecessors, (1656), 0 states have call successors, (0), 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 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:54,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:54,823 INFO L93 Difference]: Finished difference Result 1639 states and 2789 transitions. [2021-11-07 01:37:54,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-07 01:37:54,825 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-07 01:37:54,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:54,852 INFO L225 Difference]: With dead ends: 1639 [2021-11-07 01:37:54,852 INFO L226 Difference]: Without dead ends: 834 [2021-11-07 01:37:54,861 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 86 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 01:37:54,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-11-07 01:37:54,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 834. [2021-11-07 01:37:54,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 828 states have (on average 1.7355072463768115) internal successors, (1437), 833 states have internal predecessors, (1437), 0 states have call successors, (0), 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 01:37:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1437 transitions. [2021-11-07 01:37:54,967 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1437 transitions. Word has length 44 [2021-11-07 01:37:54,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:54,968 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1437 transitions. [2021-11-07 01:37:54,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 22.0) internal successors, (44), 2 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:54,968 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1437 transitions. [2021-11-07 01:37:54,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 01:37:54,973 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:54,973 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] [2021-11-07 01:37:54,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:55,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:55,187 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:37:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1746813796, now seen corresponding path program 1 times [2021-11-07 01:37:55,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:55,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1745487983] [2021-11-07 01:37:55,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:55,190 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:55,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:55,191 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:55,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-07 01:37:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:55,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 461 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:37:55,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:55,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:37:55,794 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:55,920 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 01:37:55,920 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:55,920 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1745487983] [2021-11-07 01:37:55,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1745487983] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:55,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:55,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:37:55,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210731891] [2021-11-07 01:37:55,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:55,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:55,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:55,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:55,928 INFO L87 Difference]: Start difference. First operand 834 states and 1437 transitions. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:56,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:56,073 INFO L93 Difference]: Finished difference Result 2472 states and 4263 transitions. [2021-11-07 01:37:56,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:56,074 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 01:37:56,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:56,089 INFO L225 Difference]: With dead ends: 2472 [2021-11-07 01:37:56,089 INFO L226 Difference]: Without dead ends: 1653 [2021-11-07 01:37:56,092 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 86 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 01:37:56,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1653 states. [2021-11-07 01:37:56,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1653 to 833. [2021-11-07 01:37:56,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 833 states, 827 states have (on average 1.7315598548972189) internal successors, (1432), 832 states have internal predecessors, (1432), 0 states have call successors, (0), 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 01:37:56,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 833 states to 833 states and 1432 transitions. [2021-11-07 01:37:56,188 INFO L78 Accepts]: Start accepts. Automaton has 833 states and 1432 transitions. Word has length 45 [2021-11-07 01:37:56,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:56,190 INFO L470 AbstractCegarLoop]: Abstraction has 833 states and 1432 transitions. [2021-11-07 01:37:56,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 833 states and 1432 transitions. [2021-11-07 01:37:56,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 01:37:56,201 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:56,201 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:56,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:56,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:56,417 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:37:56,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:56,418 INFO L85 PathProgramCache]: Analyzing trace with hash -647888126, now seen corresponding path program 1 times [2021-11-07 01:37:56,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:56,419 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1132188853] [2021-11-07 01:37:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:56,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:56,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:56,420 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:56,446 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-07 01:37:56,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:56,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:37:56,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:57,008 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 01:37:57,008 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:57,151 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 01:37:57,151 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:57,152 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1132188853] [2021-11-07 01:37:57,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1132188853] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:57,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:57,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:37:57,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975210569] [2021-11-07 01:37:57,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:57,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:57,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:57,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:57,154 INFO L87 Difference]: Start difference. First operand 833 states and 1432 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 01:37:57,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:57,515 INFO L93 Difference]: Finished difference Result 3249 states and 5590 transitions. [2021-11-07 01:37:57,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:37:57,516 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 01:37:57,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:57,531 INFO L225 Difference]: With dead ends: 3249 [2021-11-07 01:37:57,531 INFO L226 Difference]: Without dead ends: 2434 [2021-11-07 01:37:57,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2434 states. [2021-11-07 01:37:57,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2434 to 832. [2021-11-07 01:37:57,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 826 states have (on average 1.728813559322034) internal successors, (1428), 831 states have internal predecessors, (1428), 0 states have call successors, (0), 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 01:37:57,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1428 transitions. [2021-11-07 01:37:57,614 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1428 transitions. Word has length 47 [2021-11-07 01:37:57,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:57,614 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1428 transitions. [2021-11-07 01:37:57,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 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 01:37:57,615 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1428 transitions. [2021-11-07 01:37:57,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 01:37:57,619 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:57,619 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:57,641 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:57,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:57,838 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:37:57,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:57,838 INFO L85 PathProgramCache]: Analyzing trace with hash -1559988203, now seen corresponding path program 1 times [2021-11-07 01:37:57,839 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:57,839 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356902224] [2021-11-07 01:37:57,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:57,840 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:57,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:57,841 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:57,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-07 01:37:58,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:58,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 01:37:58,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:58,351 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 01:37:58,351 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:58,477 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 01:37:58,477 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:58,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356902224] [2021-11-07 01:37:58,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356902224] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:58,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:58,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:37:58,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47731778] [2021-11-07 01:37:58,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:37:58,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:58,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:37:58,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:58,481 INFO L87 Difference]: Start difference. First operand 832 states and 1428 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:58,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:58,577 INFO L93 Difference]: Finished difference Result 1661 states and 2853 transitions. [2021-11-07 01:37:58,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:37:58,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-07 01:37:58,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:58,583 INFO L225 Difference]: With dead ends: 1661 [2021-11-07 01:37:58,584 INFO L226 Difference]: Without dead ends: 837 [2021-11-07 01:37:58,585 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:37:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2021-11-07 01:37:58,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 832. [2021-11-07 01:37:58,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 826 states have (on average 1.725181598062954) internal successors, (1425), 831 states have internal predecessors, (1425), 0 states have call successors, (0), 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 01:37:58,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1425 transitions. [2021-11-07 01:37:58,649 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1425 transitions. Word has length 48 [2021-11-07 01:37:58,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:37:58,650 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1425 transitions. [2021-11-07 01:37:58,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:58,650 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1425 transitions. [2021-11-07 01:37:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-07 01:37:58,652 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:37:58,652 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:37:58,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-07 01:37:58,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:37:58,866 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:37:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:37:58,867 INFO L85 PathProgramCache]: Analyzing trace with hash -532074006, now seen corresponding path program 1 times [2021-11-07 01:37:58,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:37:58,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [714624490] [2021-11-07 01:37:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:37:58,868 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:37:58,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:37:58,869 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:37:58,882 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-07 01:37:59,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:37:59,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 01:37:59,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:37:59,438 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 01:37:59,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:37:59,579 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 01:37:59,579 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:37:59,580 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [714624490] [2021-11-07 01:37:59,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [714624490] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:37:59,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:37:59,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:37:59,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534629107] [2021-11-07 01:37:59,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:37:59,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:37:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:37:59,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:37:59,582 INFO L87 Difference]: Start difference. First operand 832 states and 1425 transitions. Second operand has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:37:59,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:37:59,941 INFO L93 Difference]: Finished difference Result 3236 states and 5566 transitions. [2021-11-07 01:37:59,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 01:37:59,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-07 01:37:59,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:37:59,958 INFO L225 Difference]: With dead ends: 3236 [2021-11-07 01:37:59,958 INFO L226 Difference]: Without dead ends: 2430 [2021-11-07 01:37:59,960 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-11-07 01:37:59,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2430 states. [2021-11-07 01:38:00,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2430 to 832. [2021-11-07 01:38:00,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 826 states have (on average 1.721549636803874) internal successors, (1422), 831 states have internal predecessors, (1422), 0 states have call successors, (0), 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 01:38:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 1422 transitions. [2021-11-07 01:38:00,054 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 1422 transitions. Word has length 49 [2021-11-07 01:38:00,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:00,055 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 1422 transitions. [2021-11-07 01:38:00,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.166666666666666) internal successors, (55), 6 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:00,055 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 1422 transitions. [2021-11-07 01:38:00,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-07 01:38:00,057 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:00,057 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:00,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:00,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:00,275 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:00,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash 2040658021, now seen corresponding path program 1 times [2021-11-07 01:38:00,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:00,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [626673410] [2021-11-07 01:38:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:00,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:00,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:00,278 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:00,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-07 01:38:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:00,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:00,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:00,871 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 01:38:00,871 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:00,993 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 01:38:00,993 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:00,993 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [626673410] [2021-11-07 01:38:00,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [626673410] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:00,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:00,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:38:00,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066187461] [2021-11-07 01:38:00,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:38:00,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:00,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:38:00,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:38:00,995 INFO L87 Difference]: Start difference. First operand 832 states and 1422 transitions. Second operand has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:01,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:01,159 INFO L93 Difference]: Finished difference Result 2187 states and 3731 transitions. [2021-11-07 01:38:01,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:38:01,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-07 01:38:01,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:01,169 INFO L225 Difference]: With dead ends: 2187 [2021-11-07 01:38:01,169 INFO L226 Difference]: Without dead ends: 1638 [2021-11-07 01:38:01,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:38:01,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1638 states. [2021-11-07 01:38:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1638 to 1089. [2021-11-07 01:38:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1089 states, 1083 states have (on average 1.7497691597414589) internal successors, (1895), 1088 states have internal predecessors, (1895), 0 states have call successors, (0), 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 01:38:01,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1089 states to 1089 states and 1895 transitions. [2021-11-07 01:38:01,261 INFO L78 Accepts]: Start accepts. Automaton has 1089 states and 1895 transitions. Word has length 51 [2021-11-07 01:38:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:01,261 INFO L470 AbstractCegarLoop]: Abstraction has 1089 states and 1895 transitions. [2021-11-07 01:38:01,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.5) internal successors, (54), 4 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:01,261 INFO L276 IsEmpty]: Start isEmpty. Operand 1089 states and 1895 transitions. [2021-11-07 01:38:01,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 01:38:01,263 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:01,263 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] [2021-11-07 01:38:01,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:01,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:01,478 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:01,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:01,478 INFO L85 PathProgramCache]: Analyzing trace with hash 209176310, now seen corresponding path program 1 times [2021-11-07 01:38:01,479 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:01,479 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847370357] [2021-11-07 01:38:01,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:01,480 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:01,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:01,480 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:01,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-07 01:38:01,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:01,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 479 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:01,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:02,101 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 01:38:02,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:02,254 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 01:38:02,255 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:02,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847370357] [2021-11-07 01:38:02,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847370357] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:02,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:02,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:02,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401646273] [2021-11-07 01:38:02,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:02,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:02,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:02,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:02,257 INFO L87 Difference]: Start difference. First operand 1089 states and 1895 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 01:38:02,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:02,435 INFO L93 Difference]: Finished difference Result 2848 states and 4951 transitions. [2021-11-07 01:38:02,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:02,435 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 63 [2021-11-07 01:38:02,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:02,446 INFO L225 Difference]: With dead ends: 2848 [2021-11-07 01:38:02,447 INFO L226 Difference]: Without dead ends: 1843 [2021-11-07 01:38:02,449 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:02,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1843 states. [2021-11-07 01:38:02,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1843 to 1294. [2021-11-07 01:38:02,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1288 states have (on average 1.7631987577639752) internal successors, (2271), 1293 states have internal predecessors, (2271), 0 states have call successors, (0), 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 01:38:02,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 2271 transitions. [2021-11-07 01:38:02,561 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 2271 transitions. Word has length 63 [2021-11-07 01:38:02,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:02,563 INFO L470 AbstractCegarLoop]: Abstraction has 1294 states and 2271 transitions. [2021-11-07 01:38:02,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 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 01:38:02,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 2271 transitions. [2021-11-07 01:38:02,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 01:38:02,566 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:02,567 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:38:02,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:02,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:02,781 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:02,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash 83616469, now seen corresponding path program 1 times [2021-11-07 01:38:02,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:02,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1887726743] [2021-11-07 01:38:02,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:02,782 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:02,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:02,784 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:02,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-07 01:38:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:03,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 481 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:03,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:03,486 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 01:38:03,486 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:03,632 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 01:38:03,632 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:03,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1887726743] [2021-11-07 01:38:03,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1887726743] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:03,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:03,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:03,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507606295] [2021-11-07 01:38:03,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:03,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:03,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:03,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:03,635 INFO L87 Difference]: Start difference. First operand 1294 states and 2271 transitions. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:38:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:03,818 INFO L93 Difference]: Finished difference Result 3507 states and 6165 transitions. [2021-11-07 01:38:03,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:03,819 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-07 01:38:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:03,833 INFO L225 Difference]: With dead ends: 3507 [2021-11-07 01:38:03,834 INFO L226 Difference]: Without dead ends: 2301 [2021-11-07 01:38:03,836 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:03,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-07 01:38:03,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1752. [2021-11-07 01:38:03,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1746 states have (on average 1.7829324169530356) internal successors, (3113), 1751 states have internal predecessors, (3113), 0 states have call successors, (0), 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 01:38:03,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3113 transitions. [2021-11-07 01:38:03,993 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3113 transitions. Word has length 64 [2021-11-07 01:38:03,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:03,993 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 3113 transitions. [2021-11-07 01:38:03,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 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 01:38:03,993 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3113 transitions. [2021-11-07 01:38:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:38:03,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:03,997 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:04,015 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:04,211 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:04,212 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:04,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:04,212 INFO L85 PathProgramCache]: Analyzing trace with hash -1201214011, now seen corresponding path program 1 times [2021-11-07 01:38:04,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:04,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1972332361] [2021-11-07 01:38:04,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:04,213 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:04,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:04,214 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:04,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-07 01:38:04,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:04,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:04,859 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:04,859 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:04,992 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:04,992 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:04,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1972332361] [2021-11-07 01:38:04,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1972332361] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:04,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:04,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-07 01:38:04,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708668262] [2021-11-07 01:38:04,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:38:04,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:04,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:38:04,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-07 01:38:04,994 INFO L87 Difference]: Start difference. First operand 1752 states and 3113 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:05,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:05,193 INFO L93 Difference]: Finished difference Result 3764 states and 6635 transitions. [2021-11-07 01:38:05,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:05,194 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-11-07 01:38:05,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:05,208 INFO L225 Difference]: With dead ends: 3764 [2021-11-07 01:38:05,208 INFO L226 Difference]: Without dead ends: 2301 [2021-11-07 01:38:05,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 126 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 01:38:05,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-11-07 01:38:05,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1752. [2021-11-07 01:38:05,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1746 states have (on average 1.7817869415807561) internal successors, (3111), 1751 states have internal predecessors, (3111), 0 states have call successors, (0), 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 01:38:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3111 transitions. [2021-11-07 01:38:05,351 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3111 transitions. Word has length 65 [2021-11-07 01:38:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:05,351 INFO L470 AbstractCegarLoop]: Abstraction has 1752 states and 3111 transitions. [2021-11-07 01:38:05,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3111 transitions. [2021-11-07 01:38:05,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-07 01:38:05,355 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:05,355 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] [2021-11-07 01:38:05,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:05,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:05,578 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:05,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:05,578 INFO L85 PathProgramCache]: Analyzing trace with hash 549483300, now seen corresponding path program 1 times [2021-11-07 01:38:05,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:05,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190542991] [2021-11-07 01:38:05,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:05,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:05,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:05,579 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:05,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-07 01:38:06,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 483 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:06,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:06,211 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 01:38:06,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:06,368 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 01:38:06,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:06,368 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190542991] [2021-11-07 01:38:06,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190542991] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:06,368 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:06,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:06,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705234742] [2021-11-07 01:38:06,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:06,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:06,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:06,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:06,370 INFO L87 Difference]: Start difference. First operand 1752 states and 3111 transitions. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:38:06,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:06,592 INFO L93 Difference]: Finished difference Result 4853 states and 8640 transitions. [2021-11-07 01:38:06,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:06,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 65 [2021-11-07 01:38:06,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:06,612 INFO L225 Difference]: With dead ends: 4853 [2021-11-07 01:38:06,612 INFO L226 Difference]: Without dead ends: 3197 [2021-11-07 01:38:06,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:06,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3197 states. [2021-11-07 01:38:06,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3197 to 2648. [2021-11-07 01:38:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2642 states have (on average 1.8009084027252082) internal successors, (4758), 2647 states have internal predecessors, (4758), 0 states have call successors, (0), 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 01:38:06,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4758 transitions. [2021-11-07 01:38:06,818 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4758 transitions. Word has length 65 [2021-11-07 01:38:06,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:06,819 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 4758 transitions. [2021-11-07 01:38:06,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 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 01:38:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4758 transitions. [2021-11-07 01:38:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 01:38:06,824 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:06,824 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 01:38:06,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:07,038 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:07,039 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:07,039 INFO L85 PathProgramCache]: Analyzing trace with hash 940941719, now seen corresponding path program 1 times [2021-11-07 01:38:07,039 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:07,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [5160636] [2021-11-07 01:38:07,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:07,040 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:07,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:07,040 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:07,041 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-07 01:38:07,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:07,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:07,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:07,699 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 01:38:07,699 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:07,841 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 01:38:07,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:07,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [5160636] [2021-11-07 01:38:07,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [5160636] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:07,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:07,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:07,842 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002439696] [2021-11-07 01:38:07,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:07,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:07,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:07,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:07,843 INFO L87 Difference]: Start difference. First operand 2648 states and 4758 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:08,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:08,130 INFO L93 Difference]: Finished difference Result 7277 states and 13100 transitions. [2021-11-07 01:38:08,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:08,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-11-07 01:38:08,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:08,174 INFO L225 Difference]: With dead ends: 7277 [2021-11-07 01:38:08,174 INFO L226 Difference]: Without dead ends: 4759 [2021-11-07 01:38:08,178 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:08,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4759 states. [2021-11-07 01:38:08,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4759 to 4210. [2021-11-07 01:38:08,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4210 states, 4204 states have (on average 1.8142245480494767) internal successors, (7627), 4209 states have internal predecessors, (7627), 0 states have call successors, (0), 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 01:38:08,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4210 states to 4210 states and 7627 transitions. [2021-11-07 01:38:08,472 INFO L78 Accepts]: Start accepts. Automaton has 4210 states and 7627 transitions. Word has length 66 [2021-11-07 01:38:08,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:08,474 INFO L470 AbstractCegarLoop]: Abstraction has 4210 states and 7627 transitions. [2021-11-07 01:38:08,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 4210 states and 7627 transitions. [2021-11-07 01:38:08,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 01:38:08,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:08,479 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 01:38:08,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:08,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:08,694 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:08,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 379167669, now seen corresponding path program 1 times [2021-11-07 01:38:08,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:08,695 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449975796] [2021-11-07 01:38:08,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:08,695 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:08,695 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:08,696 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:08,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-07 01:38:09,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:09,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:09,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:09,456 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 01:38:09,456 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:09,617 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 01:38:09,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:09,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449975796] [2021-11-07 01:38:09,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1449975796] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:09,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:09,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:09,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222930262] [2021-11-07 01:38:09,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:09,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:09,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:09,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:09,619 INFO L87 Difference]: Start difference. First operand 4210 states and 7627 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:10,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:10,093 INFO L93 Difference]: Finished difference Result 11679 states and 21190 transitions. [2021-11-07 01:38:10,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:10,094 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 01:38:10,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:10,115 INFO L225 Difference]: With dead ends: 11679 [2021-11-07 01:38:10,115 INFO L226 Difference]: Without dead ends: 7633 [2021-11-07 01:38:10,122 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:10,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-11-07 01:38:10,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 7084. [2021-11-07 01:38:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7084 states, 7078 states have (on average 1.8225487425826505) internal successors, (12900), 7083 states have internal predecessors, (12900), 0 states have call successors, (0), 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 01:38:10,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7084 states to 7084 states and 12900 transitions. [2021-11-07 01:38:10,588 INFO L78 Accepts]: Start accepts. Automaton has 7084 states and 12900 transitions. Word has length 67 [2021-11-07 01:38:10,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:10,588 INFO L470 AbstractCegarLoop]: Abstraction has 7084 states and 12900 transitions. [2021-11-07 01:38:10,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:10,589 INFO L276 IsEmpty]: Start isEmpty. Operand 7084 states and 12900 transitions. [2021-11-07 01:38:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:38:10,636 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:10,636 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:10,652 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:10,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:10,837 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:10,837 INFO L85 PathProgramCache]: Analyzing trace with hash 928910105, now seen corresponding path program 1 times [2021-11-07 01:38:10,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:10,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [302278087] [2021-11-07 01:38:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:10,838 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:10,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:10,839 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:10,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-07 01:38:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:11,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:11,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:38:11,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:11,741 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-07 01:38:11,741 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:11,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [302278087] [2021-11-07 01:38:11,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [302278087] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:11,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:11,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-11-07 01:38:11,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804112499] [2021-11-07 01:38:11,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 01:38:11,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:11,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 01:38:11,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 01:38:11,743 INFO L87 Difference]: Start difference. First operand 7084 states and 12900 transitions. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:38:15,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:15,047 INFO L93 Difference]: Finished difference Result 26847 states and 48935 transitions. [2021-11-07 01:38:15,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 01:38:15,049 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:38:15,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:15,105 INFO L225 Difference]: With dead ends: 26847 [2021-11-07 01:38:15,106 INFO L226 Difference]: Without dead ends: 20050 [2021-11-07 01:38:15,116 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:38:15,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20050 states. [2021-11-07 01:38:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20050 to 7034. [2021-11-07 01:38:15,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7034 states, 7028 states have (on average 1.807057484348321) internal successors, (12700), 7033 states have internal predecessors, (12700), 0 states have call successors, (0), 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 01:38:15,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7034 states to 7034 states and 12700 transitions. [2021-11-07 01:38:15,639 INFO L78 Accepts]: Start accepts. Automaton has 7034 states and 12700 transitions. Word has length 68 [2021-11-07 01:38:15,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:15,639 INFO L470 AbstractCegarLoop]: Abstraction has 7034 states and 12700 transitions. [2021-11-07 01:38:15,639 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 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 01:38:15,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7034 states and 12700 transitions. [2021-11-07 01:38:15,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 01:38:15,645 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:15,645 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:15,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-07 01:38:15,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:15,860 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:15,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1760002120, now seen corresponding path program 1 times [2021-11-07 01:38:15,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:15,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1767925237] [2021-11-07 01:38:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:15,862 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:15,862 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:15,862 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:15,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-07 01:38:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:16,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:16,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:16,639 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 01:38:16,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:16,801 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 01:38:16,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:16,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1767925237] [2021-11-07 01:38:16,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1767925237] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:16,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-07 01:38:16,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-07 01:38:16,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952571792] [2021-11-07 01:38:16,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:16,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:16,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:16,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:16,803 INFO L87 Difference]: Start difference. First operand 7034 states and 12700 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:17,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:17,497 INFO L93 Difference]: Finished difference Result 20480 states and 37032 transitions. [2021-11-07 01:38:17,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:17,498 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-11-07 01:38:17,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:17,531 INFO L225 Difference]: With dead ends: 20480 [2021-11-07 01:38:17,532 INFO L226 Difference]: Without dead ends: 13617 [2021-11-07 01:38:17,542 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 01:38:17,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13617 states. [2021-11-07 01:38:18,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13617 to 13068. [2021-11-07 01:38:18,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13068 states, 13062 states have (on average 1.811437758383096) internal successors, (23661), 13067 states have internal predecessors, (23661), 0 states have call successors, (0), 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 01:38:18,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13068 states to 13068 states and 23661 transitions. [2021-11-07 01:38:18,207 INFO L78 Accepts]: Start accepts. Automaton has 13068 states and 23661 transitions. Word has length 68 [2021-11-07 01:38:18,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:18,207 INFO L470 AbstractCegarLoop]: Abstraction has 13068 states and 23661 transitions. [2021-11-07 01:38:18,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:38:18,208 INFO L276 IsEmpty]: Start isEmpty. Operand 13068 states and 23661 transitions. [2021-11-07 01:38:18,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 01:38:18,216 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:18,216 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 01:38:18,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-07 01:38:18,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:38:18,430 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:18,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:18,431 INFO L85 PathProgramCache]: Analyzing trace with hash -1115801708, now seen corresponding path program 1 times [2021-11-07 01:38:18,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:18,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356654005] [2021-11-07 01:38:18,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:18,432 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:18,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:18,433 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:18,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-07 01:38:19,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:19,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:19,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:19,213 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:19,412 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:19,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356654005] [2021-11-07 01:38:19,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356654005] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:19,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1609287949] [2021-11-07 01:38:19,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:19,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:19,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:19,413 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:19,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-07 01:38:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:20,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 01:38:20,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:20,381 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:20,382 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:20,562 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:20,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1609287949] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:20,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:20,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [5, 5] total 9 [2021-11-07 01:38:20,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434298172] [2021-11-07 01:38:20,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 01:38:20,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:20,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 01:38:20,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:20,564 INFO L87 Difference]: Start difference. First operand 13068 states and 23661 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 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 01:38:21,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:21,257 INFO L93 Difference]: Finished difference Result 13530 states and 24427 transitions. [2021-11-07 01:38:21,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 01:38:21,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 01:38:21,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:21,290 INFO L225 Difference]: With dead ends: 13530 [2021-11-07 01:38:21,290 INFO L226 Difference]: Without dead ends: 13070 [2021-11-07 01:38:21,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-07 01:38:21,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13070 states. [2021-11-07 01:38:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13070 to 13056. [2021-11-07 01:38:22,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13056 states, 13052 states have (on average 1.8114465216058842) internal successors, (23643), 13055 states have internal predecessors, (23643), 0 states have call successors, (0), 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 01:38:22,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13056 states to 13056 states and 23643 transitions. [2021-11-07 01:38:22,144 INFO L78 Accepts]: Start accepts. Automaton has 13056 states and 23643 transitions. Word has length 69 [2021-11-07 01:38:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:22,145 INFO L470 AbstractCegarLoop]: Abstraction has 13056 states and 23643 transitions. [2021-11-07 01:38:22,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 2 states have internal predecessors, (63), 0 states have call successors, (0), 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 01:38:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 13056 states and 23643 transitions. [2021-11-07 01:38:22,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 01:38:22,164 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:22,165 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:38:22,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:22,380 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (17)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:22,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:22,578 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:22,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:22,578 INFO L85 PathProgramCache]: Analyzing trace with hash 799884798, now seen corresponding path program 1 times [2021-11-07 01:38:22,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:22,579 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1176389185] [2021-11-07 01:38:22,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:22,579 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:22,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:22,580 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:22,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-07 01:38:23,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:23,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:23,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:23,534 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:23,534 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:23,811 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:23,811 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:23,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1176389185] [2021-11-07 01:38:23,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1176389185] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:23,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [704851047] [2021-11-07 01:38:23,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:23,812 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:23,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:23,813 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:23,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-07 01:38:24,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:24,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 614 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:38:24,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:25,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:25,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [704851047] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:25,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:25,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:38:25,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260243054] [2021-11-07 01:38:25,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:38:25,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:25,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:38:25,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:38:25,761 INFO L87 Difference]: Start difference. First operand 13056 states and 23643 transitions. Second operand has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 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 01:38:47,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:47,410 INFO L93 Difference]: Finished difference Result 32516 states and 57819 transitions. [2021-11-07 01:38:47,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 01:38:47,410 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 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 103 [2021-11-07 01:38:47,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:47,475 INFO L225 Difference]: With dead ends: 32516 [2021-11-07 01:38:47,475 INFO L226 Difference]: Without dead ends: 32036 [2021-11-07 01:38:47,483 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 388 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1073, Invalid=3483, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 01:38:47,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32036 states. [2021-11-07 01:38:48,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32036 to 26266. [2021-11-07 01:38:48,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26266 states, 26262 states have (on average 1.8105247125123753) internal successors, (47548), 26265 states have internal predecessors, (47548), 0 states have call successors, (0), 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 01:38:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26266 states to 26266 states and 47548 transitions. [2021-11-07 01:38:48,929 INFO L78 Accepts]: Start accepts. Automaton has 26266 states and 47548 transitions. Word has length 103 [2021-11-07 01:38:48,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:48,929 INFO L470 AbstractCegarLoop]: Abstraction has 26266 states and 47548 transitions. [2021-11-07 01:38:48,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.25) internal successors, (148), 15 states have internal predecessors, (148), 0 states have call successors, (0), 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 01:38:48,929 INFO L276 IsEmpty]: Start isEmpty. Operand 26266 states and 47548 transitions. [2021-11-07 01:38:48,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 01:38:48,962 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:48,962 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:38:48,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:49,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:49,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:49,378 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:49,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:49,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1883446035, now seen corresponding path program 1 times [2021-11-07 01:38:49,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:49,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [429993835] [2021-11-07 01:38:49,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:49,379 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:49,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:49,379 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:49,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-07 01:38:50,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:50,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:50,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:50,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:50,672 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:50,673 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:50,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [429993835] [2021-11-07 01:38:50,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [429993835] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:50,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [614847963] [2021-11-07 01:38:50,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:50,673 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:50,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:50,674 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:50,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-07 01:38:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:51,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:51,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:51,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:51,953 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:52,151 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:52,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [614847963] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:52,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:52,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:38:52,152 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205187331] [2021-11-07 01:38:52,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:38:52,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:52,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:38:52,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:38:52,154 INFO L87 Difference]: Start difference. First operand 26266 states and 47548 transitions. Second operand has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 01:38:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:38:53,185 INFO L93 Difference]: Finished difference Result 28173 states and 50732 transitions. [2021-11-07 01:38:53,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 01:38:53,185 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 104 [2021-11-07 01:38:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:38:53,231 INFO L225 Difference]: With dead ends: 28173 [2021-11-07 01:38:53,231 INFO L226 Difference]: Without dead ends: 26909 [2021-11-07 01:38:53,242 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 404 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:38:53,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26909 states. [2021-11-07 01:38:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26909 to 26148. [2021-11-07 01:38:54,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26148 states, 26144 states have (on average 1.8109700122399022) internal successors, (47346), 26147 states have internal predecessors, (47346), 0 states have call successors, (0), 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 01:38:54,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26148 states to 26148 states and 47346 transitions. [2021-11-07 01:38:54,753 INFO L78 Accepts]: Start accepts. Automaton has 26148 states and 47346 transitions. Word has length 104 [2021-11-07 01:38:54,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:38:54,754 INFO L470 AbstractCegarLoop]: Abstraction has 26148 states and 47346 transitions. [2021-11-07 01:38:54,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.5) internal successors, (98), 4 states have internal predecessors, (98), 0 states have call successors, (0), 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 01:38:54,754 INFO L276 IsEmpty]: Start isEmpty. Operand 26148 states and 47346 transitions. [2021-11-07 01:38:54,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:38:54,785 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:38:54,786 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:38:54,798 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:54,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-07 01:38:55,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:55,187 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:38:55,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:38:55,188 INFO L85 PathProgramCache]: Analyzing trace with hash -2053832042, now seen corresponding path program 1 times [2021-11-07 01:38:55,188 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:38:55,188 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1143379234] [2021-11-07 01:38:55,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:55,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:38:55,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:38:55,189 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:38:55,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-07 01:38:56,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:38:56,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:56,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:56,582 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:38:56,582 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:38:56,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1143379234] [2021-11-07 01:38:56,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1143379234] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:38:56,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [821824464] [2021-11-07 01:38:56,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:38:56,583 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:38:56,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:38:56,584 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:38:56,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-07 01:38:57,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:38:57,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 01:38:57,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:38:58,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:58,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:38:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:38:58,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [821824464] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:38:58,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:38:58,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5] total 22 [2021-11-07 01:38:58,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866846746] [2021-11-07 01:38:58,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 01:38:58,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:38:58,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 01:38:58,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=394, Unknown=0, NotChecked=0, Total=462 [2021-11-07 01:38:58,702 INFO L87 Difference]: Start difference. First operand 26148 states and 47346 transitions. Second operand has 16 states, 16 states have (on average 9.4375) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 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 01:39:17,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:17,212 INFO L93 Difference]: Finished difference Result 63781 states and 113652 transitions. [2021-11-07 01:39:17,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 01:39:17,213 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 9.4375) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 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 105 [2021-11-07 01:39:17,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:17,383 INFO L225 Difference]: With dead ends: 63781 [2021-11-07 01:39:17,383 INFO L226 Difference]: Without dead ends: 62685 [2021-11-07 01:39:17,394 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 461 GetRequests, 396 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1053, Invalid=3369, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 01:39:17,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62685 states. [2021-11-07 01:39:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62685 to 52260. [2021-11-07 01:39:19,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52260 states, 52256 states have (on average 1.8108351194121248) internal successors, (94627), 52259 states have internal predecessors, (94627), 0 states have call successors, (0), 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 01:39:20,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52260 states to 52260 states and 94627 transitions. [2021-11-07 01:39:20,089 INFO L78 Accepts]: Start accepts. Automaton has 52260 states and 94627 transitions. Word has length 105 [2021-11-07 01:39:20,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:20,089 INFO L470 AbstractCegarLoop]: Abstraction has 52260 states and 94627 transitions. [2021-11-07 01:39:20,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 9.4375) internal successors, (151), 15 states have internal predecessors, (151), 0 states have call successors, (0), 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 01:39:20,089 INFO L276 IsEmpty]: Start isEmpty. Operand 52260 states and 94627 transitions. [2021-11-07 01:39:20,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-11-07 01:39:20,136 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:20,136 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:20,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-07 01:39:20,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:20,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 [2021-11-07 01:39:20,542 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:20,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:20,542 INFO L85 PathProgramCache]: Analyzing trace with hash -114669996, now seen corresponding path program 1 times [2021-11-07 01:39:20,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:20,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1712202088] [2021-11-07 01:39:20,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:20,543 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:20,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:20,544 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:20,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-11-07 01:39:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:21,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:39:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:21,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:22,116 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:22,117 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:22,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1712202088] [2021-11-07 01:39:22,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1712202088] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:22,117 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [501043405] [2021-11-07 01:39:22,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:22,117 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:22,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:22,118 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:22,119 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-11-07 01:39:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:23,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 616 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:39:23,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:23,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:39:23,778 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:39:24,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [501043405] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:24,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:39:24,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 11 [2021-11-07 01:39:24,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184912399] [2021-11-07 01:39:24,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 01:39:24,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:24,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 01:39:24,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:39:24,097 INFO L87 Difference]: Start difference. First operand 52260 states and 94627 transitions. Second operand has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 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 01:39:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:28,685 INFO L93 Difference]: Finished difference Result 68815 states and 122120 transitions. [2021-11-07 01:39:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 01:39:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 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 105 [2021-11-07 01:39:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:28,785 INFO L225 Difference]: With dead ends: 68815 [2021-11-07 01:39:28,785 INFO L226 Difference]: Without dead ends: 65659 [2021-11-07 01:39:28,797 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 420 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:39:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65659 states. [2021-11-07 01:39:32,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65659 to 57811. [2021-11-07 01:39:32,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57811 states, 57807 states have (on average 1.796737419343678) internal successors, (103864), 57810 states have internal predecessors, (103864), 0 states have call successors, (0), 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 01:39:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57811 states to 57811 states and 103864 transitions. [2021-11-07 01:39:32,341 INFO L78 Accepts]: Start accepts. Automaton has 57811 states and 103864 transitions. Word has length 105 [2021-11-07 01:39:32,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:32,342 INFO L470 AbstractCegarLoop]: Abstraction has 57811 states and 103864 transitions. [2021-11-07 01:39:32,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.8) internal successors, (99), 4 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 01:39:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 57811 states and 103864 transitions. [2021-11-07 01:39:32,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 01:39:32,411 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:32,411 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:32,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:32,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (25)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:32,812 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:32,812 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:32,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:32,813 INFO L85 PathProgramCache]: Analyzing trace with hash -238416910, now seen corresponding path program 1 times [2021-11-07 01:39:32,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:32,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1845565119] [2021-11-07 01:39:32,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:32,814 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:32,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:32,825 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:32,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-11-07 01:39:33,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:33,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:39:33,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:34,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:34,472 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:34,472 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:34,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1845565119] [2021-11-07 01:39:34,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1845565119] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:34,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1062272987] [2021-11-07 01:39:34,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:34,473 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:34,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:34,481 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:34,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Waiting until timeout for monitored process [2021-11-07 01:39:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:36,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 617 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 01:39:36,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:36,521 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:39:36,521 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:39:36,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1062272987] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:36,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:39:36,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [5, 5] total 15 [2021-11-07 01:39:36,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019458120] [2021-11-07 01:39:36,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 01:39:36,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:36,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 01:39:36,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-11-07 01:39:36,761 INFO L87 Difference]: Start difference. First operand 57811 states and 103864 transitions. Second operand has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:40,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:40,445 INFO L93 Difference]: Finished difference Result 68332 states and 121254 transitions. [2021-11-07 01:39:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 01:39:40,445 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-11-07 01:39:40,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:40,538 INFO L225 Difference]: With dead ends: 68332 [2021-11-07 01:39:40,538 INFO L226 Difference]: Without dead ends: 60550 [2021-11-07 01:39:40,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 407 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=591, Unknown=0, NotChecked=0, Total=756 [2021-11-07 01:39:40,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60550 states. [2021-11-07 01:39:43,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60550 to 55608. [2021-11-07 01:39:43,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55608 states, 55604 states have (on average 1.8004280267606647) internal successors, (100111), 55607 states have internal predecessors, (100111), 0 states have call successors, (0), 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 01:39:43,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55608 states to 55608 states and 100111 transitions. [2021-11-07 01:39:43,903 INFO L78 Accepts]: Start accepts. Automaton has 55608 states and 100111 transitions. Word has length 106 [2021-11-07 01:39:43,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 01:39:43,904 INFO L470 AbstractCegarLoop]: Abstraction has 55608 states and 100111 transitions. [2021-11-07 01:39:43,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.11111111111111) internal successors, (100), 9 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 01:39:43,904 INFO L276 IsEmpty]: Start isEmpty. Operand 55608 states and 100111 transitions. [2021-11-07 01:39:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 01:39:43,957 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 01:39:43,957 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:43,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (26)] Forceful destruction successful, exit code 0 [2021-11-07 01:39:44,166 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (27)] Ended with exit code 0 [2021-11-07 01:39:44,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:44,362 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-11-07 01:39:44,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 01:39:44,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1580091474, now seen corresponding path program 1 times [2021-11-07 01:39:44,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-07 01:39:44,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1635192518] [2021-11-07 01:39:44,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:44,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-07 01:39:44,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat [2021-11-07 01:39:44,364 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-07 01:39:44,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-07 01:39:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:45,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 01:39:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:45,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 01:39:46,133 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-07 01:39:46,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1635192518] [2021-11-07 01:39:46,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1635192518] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-07 01:39:46,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2083139750] [2021-11-07 01:39:46,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 01:39:46,134 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-07 01:39:46,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 [2021-11-07 01:39:46,135 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-07 01:39:46,136 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fb2227e-a18d-4c67-9add-6699f45f7770/bin/utaipan-UUZaoUuFF8/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-07 01:39:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 01:39:47,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 628 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 01:39:47,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 01:39:47,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:39:47,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-07 01:39:48,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-07 01:39:48,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2083139750] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-07 01:39:48,169 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-11-07 01:39:48,169 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [5, 5] total 10 [2021-11-07 01:39:48,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395151685] [2021-11-07 01:39:48,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-07 01:39:48,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-07 01:39:48,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-07 01:39:48,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-11-07 01:39:48,171 INFO L87 Difference]: Start difference. First operand 55608 states and 100111 transitions. Second operand has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 01:39:52,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 01:39:52,161 INFO L93 Difference]: Finished difference Result 69938 states and 123512 transitions. [2021-11-07 01:39:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 01:39:52,161 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 25.5) internal successors, (102), 4 states have internal predecessors, (102), 0 states have call successors, (0), 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 108 [2021-11-07 01:39:52,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 01:39:52,253 INFO L225 Difference]: With dead ends: 69938 [2021-11-07 01:39:52,253 INFO L226 Difference]: Without dead ends: 63996 [2021-11-07 01:39:52,266 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 420 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-07 01:39:52,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63996 states.