./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs --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 495c0a8d92ee0996091cacb8f0345f4ec1c2207f ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs --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 495c0a8d92ee0996091cacb8f0345f4ec1c2207f .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:40:45,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:40:45,848 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:40:45,885 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:40:45,886 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:40:45,887 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:40:45,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:40:45,892 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:40:45,894 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:40:45,896 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:40:45,897 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:40:45,899 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:40:45,899 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:40:45,901 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:40:45,902 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:40:45,904 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:40:45,905 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:40:45,907 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:40:45,909 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:40:45,912 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:40:45,915 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:40:45,917 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:40:45,918 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:40:45,923 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:40:45,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:40:45,939 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:40:45,939 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:40:45,940 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:40:45,942 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:40:45,944 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:40:45,945 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:40:45,947 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:40:45,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:40:45,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:40:45,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:40:45,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:40:45,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:40:45,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:40:45,954 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:40:45,957 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:40:45,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:40:45,963 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:40:45,991 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:40:45,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:40:45,992 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:40:45,992 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:40:45,992 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:40:45,993 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:40:45,993 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:40:45,993 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:40:45,993 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:40:45,994 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:40:45,994 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:40:45,994 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:40:45,994 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:40:45,995 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:40:45,995 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:40:45,996 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:40:45,996 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:40:45,996 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:40:45,996 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:40:45,997 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:40:45,997 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:40:45,997 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:40:45,997 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:40:45,998 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:40:45,998 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:40:45,998 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:40:45,998 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:40:45,999 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:40:45,999 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:40:45,999 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:40:45,999 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:40:46,000 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:40:46,000 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:40:46,000 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:40:46,000 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:40:46,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:40:46,001 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:40:46,001 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:40:46,001 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:40:46,001 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_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 495c0a8d92ee0996091cacb8f0345f4ec1c2207f [2021-10-16 02:40:46,265 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:40:46,293 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:40:46,296 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:40:46,297 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:40:46,298 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:40:46,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2021-10-16 02:40:46,382 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data/f2dcfefdd/222897e79edc401eb596c05f288defe9/FLAG717f8d815 [2021-10-16 02:40:46,958 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:40:46,963 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2021-10-16 02:40:46,973 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data/f2dcfefdd/222897e79edc401eb596c05f288defe9/FLAG717f8d815 [2021-10-16 02:40:47,316 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data/f2dcfefdd/222897e79edc401eb596c05f288defe9 [2021-10-16 02:40:47,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:40:47,329 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:40:47,334 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:40:47,334 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:40:47,338 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:40:47,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,349 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7af3462f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47, skipping insertion in model container [2021-10-16 02:40:47,349 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,359 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:40:47,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:40:47,573 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_75cceba1-40ff-48b7-9c7b-76946f1c65cb/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2021-10-16 02:40:47,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:40:47,607 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:40:47,621 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_75cceba1-40ff-48b7-9c7b-76946f1c65cb/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2021-10-16 02:40:47,634 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:40:47,649 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:40:47,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47 WrapperNode [2021-10-16 02:40:47,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:40:47,651 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:40:47,651 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:40:47,651 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:40:47,660 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,668 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,689 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:40:47,690 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:40:47,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:40:47,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:40:47,700 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,701 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,703 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,704 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,711 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,717 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,719 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,722 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:40:47,723 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:40:47,724 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:40:47,724 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:40:47,725 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (1/1) ... [2021-10-16 02:40:47,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:40:47,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:47,784 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:40:47,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:40:47,837 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:40:47,838 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:40:47,840 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:40:47,841 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:40:47,841 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:40:47,841 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:40:47,842 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:40:48,372 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:40:48,372 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-16 02:40:48,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:48 BoogieIcfgContainer [2021-10-16 02:40:48,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:40:48,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:40:48,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:40:48,382 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:40:48,396 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:40:47" (1/3) ... [2021-10-16 02:40:48,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5fe405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:40:48, skipping insertion in model container [2021-10-16 02:40:48,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:47" (2/3) ... [2021-10-16 02:40:48,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c5fe405 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:40:48, skipping insertion in model container [2021-10-16 02:40:48,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:48" (3/3) ... [2021-10-16 02:40:48,400 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2021-10-16 02:40:48,407 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:40:48,408 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:40:48,483 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:40:48,496 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, mConcurrency=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 [2021-10-16 02:40:48,496 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:40:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:48,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:40:48,524 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:48,525 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:48,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:40:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:48,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1252423112, now seen corresponding path program 1 times [2021-10-16 02:40:48,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:40:48,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882092151] [2021-10-16 02:40:48,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:48,563 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:40:48,706 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:40:48,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [385944741] [2021-10-16 02:40:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:48,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:48,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:48,714 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:48,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:40:48,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:48,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:40:48,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:48,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:48,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:49,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:40:49,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882092151] [2021-10-16 02:40:49,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:40:49,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385944741] [2021-10-16 02:40:49,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385944741] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:49,033 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:49,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:40:49,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372550350] [2021-10-16 02:40:49,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:40:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:40:49,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:40:49,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:40:49,062 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:49,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:49,154 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2021-10-16 02:40:49,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:40:49,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 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 8 [2021-10-16 02:40:49,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:49,167 INFO L225 Difference]: With dead ends: 30 [2021-10-16 02:40:49,167 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 02:40:49,171 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:40:49,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 02:40:49,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-16 02:40:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:49,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2021-10-16 02:40:49,222 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 8 [2021-10-16 02:40:49,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:49,223 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2021-10-16 02:40:49,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:49,225 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2021-10-16 02:40:49,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:40:49,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:49,226 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:49,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:49,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-16 02:40:49,443 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:40:49,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:49,444 INFO L82 PathProgramCache]: Analyzing trace with hash -728109218, now seen corresponding path program 1 times [2021-10-16 02:40:49,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:40:49,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128787301] [2021-10-16 02:40:49,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:49,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:40:49,452 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:40:49,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [680070703] [2021-10-16 02:40:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:49,453 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:49,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:49,471 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:49,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:40:49,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:40:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:49,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:40:49,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:49,757 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:40:49,757 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:40:49,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128787301] [2021-10-16 02:40:49,758 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:40:49,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680070703] [2021-10-16 02:40:49,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [680070703] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:49,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:49,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:40:49,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985923032] [2021-10-16 02:40:49,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:40:49,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:40:49,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:40:49,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:40:49,768 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:49,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:49,929 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2021-10-16 02:40:49,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:40:49,930 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 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 12 [2021-10-16 02:40:49,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:49,937 INFO L225 Difference]: With dead ends: 50 [2021-10-16 02:40:49,937 INFO L226 Difference]: Without dead ends: 36 [2021-10-16 02:40:49,938 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:40:49,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-16 02:40:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-10-16 02:40:49,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 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) [2021-10-16 02:40:49,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2021-10-16 02:40:49,958 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 12 [2021-10-16 02:40:49,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:49,959 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2021-10-16 02:40:49,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:49,960 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2021-10-16 02:40:49,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:40:49,961 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:49,961 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:50,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-10-16 02:40:50,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-16 02:40:50,176 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:40:50,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:50,177 INFO L82 PathProgramCache]: Analyzing trace with hash 839594166, now seen corresponding path program 1 times [2021-10-16 02:40:50,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:40:50,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336393999] [2021-10-16 02:40:50,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:50,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:40:50,184 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:40:50,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [89053928] [2021-10-16 02:40:50,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:50,185 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:50,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:50,186 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:50,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:40:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:50,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:40:50,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:40:50,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:50,469 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:40:50,469 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:40:50,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336393999] [2021-10-16 02:40:50,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:40:50,470 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89053928] [2021-10-16 02:40:50,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89053928] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:50,471 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:50,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:40:50,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559993441] [2021-10-16 02:40:50,474 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:40:50,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:40:50,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:40:50,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:40:50,477 INFO L87 Difference]: Start difference. First operand 32 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:50,570 INFO L93 Difference]: Finished difference Result 84 states and 131 transitions. [2021-10-16 02:40:50,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:40:50,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 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 20 [2021-10-16 02:40:50,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:50,575 INFO L225 Difference]: With dead ends: 84 [2021-10-16 02:40:50,575 INFO L226 Difference]: Without dead ends: 56 [2021-10-16 02:40:50,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 34.9ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:40:50,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-16 02:40:50,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-16 02:40:50,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:50,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2021-10-16 02:40:50,603 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2021-10-16 02:40:50,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:50,606 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2021-10-16 02:40:50,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:50,606 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2021-10-16 02:40:50,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:40:50,609 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:50,609 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:50,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:50,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:50,819 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:40:50,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:50,819 INFO L82 PathProgramCache]: Analyzing trace with hash -1907601738, now seen corresponding path program 1 times [2021-10-16 02:40:50,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:40:50,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481858082] [2021-10-16 02:40:50,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:50,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:40:50,827 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:40:50,828 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173809861] [2021-10-16 02:40:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:50,828 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:50,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:50,829 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:40:50,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:40:50,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:50,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:40:50,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:40:51,115 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:40:51,254 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:40:51,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481858082] [2021-10-16 02:40:51,254 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:40:51,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173809861] [2021-10-16 02:40:51,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173809861] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:40:51,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [104745323] [2021-10-16 02:40:51,287 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-16 02:40:51,288 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:40:51,301 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:40:51,306 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:40:51,307 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:40:51,364 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:40:51,375 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:40:51,377 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:40:51,378 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 92 [2021-10-16 02:40:51,380 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:40:51,381 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:40:51,382 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-10-16 02:40:51,394 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 218 [2021-10-16 02:40:51,464 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,466 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,467 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,482 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,499 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:40:51,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 21 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 38 [2021-10-16 02:40:51,520 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:40:51,528 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-10-16 02:40:51,533 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:40:51,540 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 38 [2021-10-16 02:40:51,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:40:51,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:40:51,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:40:51,638 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:40:51,644 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 222 [2021-10-16 02:40:51,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:40:51,645 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:215, output treesize:222 [2021-10-16 02:40:51,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:51,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:40:51,862 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_30| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:40:51,865 INFO L168 Benchmark]: Toolchain (without parser) took 4536.08 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 66.0 MB in the beginning and 87.4 MB in the end (delta: -21.3 MB). Peak memory consumption was 39.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:51,866 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 98.6 MB. Free memory is still 54.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:40:51,866 INFO L168 Benchmark]: CACSL2BoogieTranslator took 316.30 ms. Allocated memory is still 98.6 MB. Free memory was 65.8 MB in the beginning and 74.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:51,867 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.81 ms. Allocated memory is still 98.6 MB. Free memory was 74.1 MB in the beginning and 72.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:40:51,869 INFO L168 Benchmark]: Boogie Preprocessor took 32.29 ms. Allocated memory is still 98.6 MB. Free memory was 72.4 MB in the beginning and 71.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:51,869 INFO L168 Benchmark]: RCFGBuilder took 652.71 ms. Allocated memory is still 98.6 MB. Free memory was 71.0 MB in the beginning and 55.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:51,870 INFO L168 Benchmark]: TraceAbstraction took 3486.66 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 55.0 MB in the beginning and 87.4 MB in the end (delta: -32.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:40:51,873 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 98.6 MB. Free memory is still 54.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 316.30 ms. Allocated memory is still 98.6 MB. Free memory was 65.8 MB in the beginning and 74.1 MB in the end (delta: -8.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.81 ms. Allocated memory is still 98.6 MB. Free memory was 74.1 MB in the beginning and 72.4 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 32.29 ms. Allocated memory is still 98.6 MB. Free memory was 72.4 MB in the beginning and 71.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 652.71 ms. Allocated memory is still 98.6 MB. Free memory was 71.0 MB in the beginning and 55.6 MB in the end (delta: 15.4 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3486.66 ms. Allocated memory was 98.6 MB in the beginning and 119.5 MB in the end (delta: 21.0 MB). Free memory was 55.0 MB in the beginning and 87.4 MB in the end (delta: -32.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_30| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_30|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:40:51,909 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:40:54,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:40:54,382 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:40:54,449 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:40:54,450 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:40:54,456 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:40:54,458 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:40:54,463 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:40:54,466 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:40:54,477 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:40:54,478 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:40:54,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:40:54,482 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:40:54,485 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:40:54,487 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:40:54,493 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:40:54,494 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:40:54,496 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:40:54,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:40:54,505 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:40:54,507 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:40:54,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:40:54,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:40:54,514 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:40:54,520 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:40:54,521 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:40:54,521 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:40:54,523 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:40:54,524 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:40:54,525 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:40:54,526 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:40:54,527 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:40:54,529 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:40:54,530 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:40:54,531 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:40:54,532 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:40:54,532 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:40:54,533 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:40:54,533 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:40:54,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:40:54,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:40:54,542 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:40:54,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:40:54,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:40:54,591 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:40:54,591 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:40:54,591 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:40:54,592 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:40:54,592 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:40:54,592 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:40:54,592 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:40:54,594 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:40:54,595 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:40:54,595 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:40:54,596 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:40:54,596 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:40:54,596 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:40:54,596 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:40:54,596 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:40:54,597 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:40:54,597 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:40:54,597 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:40:54,597 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:40:54,598 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:40:54,598 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:40:54,598 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:40:54,598 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:40:54,599 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:40:54,599 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:40:54,599 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:40:54,599 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:40:54,600 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:40:54,600 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:40:54,600 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:40:54,600 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:40:54,601 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:40:54,601 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:40:54,601 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_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 495c0a8d92ee0996091cacb8f0345f4ec1c2207f [2021-10-16 02:40:55,006 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:40:55,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:40:55,041 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:40:55,042 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:40:55,043 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:40:55,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2021-10-16 02:40:55,113 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data/b5f41dcf6/1a98f9cd232641af87f321eef9e2291b/FLAG4672a5b79 [2021-10-16 02:40:55,583 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:40:55,584 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c [2021-10-16 02:40:55,591 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data/b5f41dcf6/1a98f9cd232641af87f321eef9e2291b/FLAG4672a5b79 [2021-10-16 02:40:55,964 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/data/b5f41dcf6/1a98f9cd232641af87f321eef9e2291b [2021-10-16 02:40:55,967 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:40:55,968 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:40:55,970 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:40:55,970 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:40:55,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:40:55,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:40:55" (1/1) ... [2021-10-16 02:40:55,990 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@314b1ba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:55, skipping insertion in model container [2021-10-16 02:40:55,991 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:40:55" (1/1) ... [2021-10-16 02:40:55,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:40:56,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:40:56,175 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_75cceba1-40ff-48b7-9c7b-76946f1c65cb/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2021-10-16 02:40:56,204 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:40:56,217 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:40:56,232 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_75cceba1-40ff-48b7-9c7b-76946f1c65cb/sv-benchmarks/c/array-multidimensional/copy-3-n-u.c[322,335] [2021-10-16 02:40:56,251 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:40:56,307 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:40:56,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56 WrapperNode [2021-10-16 02:40:56,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:40:56,310 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:40:56,310 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:40:56,311 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:40:56,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,356 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,384 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:40:56,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:40:56,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:40:56,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:40:56,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,400 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,400 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,410 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,417 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,419 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,423 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:40:56,424 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:40:56,424 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:40:56,424 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:40:56,426 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (1/1) ... [2021-10-16 02:40:56,434 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:40:56,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:40:56,464 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:40:56,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:40:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:40:56,519 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:40:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:40:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:40:56,520 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:40:56,520 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:40:56,521 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:40:57,083 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:40:57,083 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-16 02:40:57,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:57 BoogieIcfgContainer [2021-10-16 02:40:57,086 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:40:57,088 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:40:57,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:40:57,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:40:57,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:40:55" (1/3) ... [2021-10-16 02:40:57,102 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458acc8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:40:57, skipping insertion in model container [2021-10-16 02:40:57,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:40:56" (2/3) ... [2021-10-16 02:40:57,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@458acc8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:40:57, skipping insertion in model container [2021-10-16 02:40:57,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:40:57" (3/3) ... [2021-10-16 02:40:57,107 INFO L111 eAbstractionObserver]: Analyzing ICFG copy-3-n-u.c [2021-10-16 02:40:57,114 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:40:57,114 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:40:57,189 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:40:57,202 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, mConcurrency=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 [2021-10-16 02:40:57,202 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:40:57,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:57,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:40:57,232 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:57,233 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:57,234 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:40:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2021-10-16 02:40:57,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:57,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630933002] [2021-10-16 02:40:57,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:57,282 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:57,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:57,286 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:57,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:40:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:57,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:40:57,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:57,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:57,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:57,636 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:57,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630933002] [2021-10-16 02:40:57,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630933002] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:57,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:57,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:40:57,641 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253314675] [2021-10-16 02:40:57,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:40:57,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:57,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:40:57,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:40:57,666 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 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 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:57,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:57,687 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2021-10-16 02:40:57,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:40:57,689 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 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 11 [2021-10-16 02:40:57,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:57,699 INFO L225 Difference]: With dead ends: 52 [2021-10-16 02:40:57,699 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:40:57,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:40:57,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:40:57,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-16 02:40:57,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:57,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-10-16 02:40:57,742 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2021-10-16 02:40:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:57,743 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-10-16 02:40:57,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:57,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-10-16 02:40:57,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:40:57,744 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:57,745 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:57,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:57,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:57,959 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:40:57,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:57,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2021-10-16 02:40:57,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:57,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1191067697] [2021-10-16 02:40:57,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:57,961 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:57,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:57,963 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:57,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:40:58,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:58,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:40:58,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:58,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:58,197 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:58,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:40:58,280 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:58,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1191067697] [2021-10-16 02:40:58,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1191067697] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:58,281 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:58,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:40:58,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225708440] [2021-10-16 02:40:58,283 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:40:58,283 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:58,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:40:58,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:40:58,290 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:58,539 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-10-16 02:40:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:40:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 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 11 [2021-10-16 02:40:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:58,547 INFO L225 Difference]: With dead ends: 45 [2021-10-16 02:40:58,547 INFO L226 Difference]: Without dead ends: 29 [2021-10-16 02:40:58,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:40:58,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-16 02:40:58,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-16 02:40:58,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:58,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-16 02:40:58,558 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2021-10-16 02:40:58,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:58,559 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-16 02:40:58,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:58,559 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-16 02:40:58,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:40:58,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:58,561 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:58,581 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:58,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:58,775 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:40:58,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:58,776 INFO L82 PathProgramCache]: Analyzing trace with hash 742035169, now seen corresponding path program 1 times [2021-10-16 02:40:58,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:58,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1574082471] [2021-10-16 02:40:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:58,778 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:58,778 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:58,785 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:58,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:40:58,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:58,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:40:58,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:40:59,046 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:59,046 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:40:59,148 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-16 02:40:59,148 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:40:59,148 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1574082471] [2021-10-16 02:40:59,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1574082471] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:40:59,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:40:59,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:40:59,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149655930] [2021-10-16 02:40:59,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:40:59,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:40:59,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:40:59,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:40:59,152 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:59,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:40:59,536 INFO L93 Difference]: Finished difference Result 75 states and 106 transitions. [2021-10-16 02:40:59,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:40:59,537 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 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 17 [2021-10-16 02:40:59,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:40:59,539 INFO L225 Difference]: With dead ends: 75 [2021-10-16 02:40:59,539 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 02:40:59,539 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 53.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:40:59,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 02:40:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-10-16 02:40:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:59,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-10-16 02:40:59,552 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 17 [2021-10-16 02:40:59,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:40:59,552 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-10-16 02:40:59,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:40:59,559 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-10-16 02:40:59,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:40:59,560 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:40:59,561 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:40:59,583 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:40:59,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:40:59,777 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:40:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:40:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1930294047, now seen corresponding path program 1 times [2021-10-16 02:40:59,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:40:59,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152232744] [2021-10-16 02:40:59,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:40:59,782 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:40:59,782 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:40:59,783 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:40:59,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:40:59,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:40:59,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:40:59,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:00,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:41:00,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:00,166 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:41:00,166 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:41:00,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152232744] [2021-10-16 02:41:00,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152232744] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:41:00,168 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:41:00,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:41:00,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794038393] [2021-10-16 02:41:00,169 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:41:00,169 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:41:00,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:41:00,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:41:00,171 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:00,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:00,616 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2021-10-16 02:41:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:41:00,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 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 29 [2021-10-16 02:41:00,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:00,618 INFO L225 Difference]: With dead ends: 114 [2021-10-16 02:41:00,619 INFO L226 Difference]: Without dead ends: 72 [2021-10-16 02:41:00,620 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:41:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-16 02:41:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-10-16 02:41:00,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-10-16 02:41:00,640 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 29 [2021-10-16 02:41:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:00,641 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-10-16 02:41:00,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:00,641 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-10-16 02:41:00,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 02:41:00,643 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:00,643 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:00,666 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:00,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:41:00,867 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:41:00,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:00,867 INFO L82 PathProgramCache]: Analyzing trace with hash 863846625, now seen corresponding path program 1 times [2021-10-16 02:41:00,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:41:00,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [539795552] [2021-10-16 02:41:00,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:00,869 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:41:00,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:41:00,870 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:41:00,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:41:01,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:01,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:41:01,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:01,239 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:41:01,239 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:01,441 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:41:01,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:41:01,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [539795552] [2021-10-16 02:41:01,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [539795552] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:01,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1500129674] [2021-10-16 02:41:01,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:01,442 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:41:01,442 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:41:01,446 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:41:01,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:41:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:01,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:41:01,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:01,805 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:41:01,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:01,948 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:41:01,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1500129674] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:01,948 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127876354] [2021-10-16 02:41:01,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:01,949 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:01,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:01,955 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:01,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:41:02,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:02,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:41:02,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-16 02:41:02,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-16 02:41:02,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127876354] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:41:02,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:41:02,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-16 02:41:02,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177144849] [2021-10-16 02:41:02,588 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:41:02,588 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:41:02,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:41:02,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:41:02,589 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:02,910 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2021-10-16 02:41:02,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:41:02,911 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-16 02:41:02,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:02,914 INFO L225 Difference]: With dead ends: 129 [2021-10-16 02:41:02,914 INFO L226 Difference]: Without dead ends: 105 [2021-10-16 02:41:02,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:41:02,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-16 02:41:02,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2021-10-16 02:41:02,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2625) internal successors, (101), 80 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:02,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2021-10-16 02:41:02,935 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 37 [2021-10-16 02:41:02,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:02,936 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2021-10-16 02:41:02,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:02,936 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2021-10-16 02:41:02,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-16 02:41:02,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:02,939 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:02,952 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:03,169 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-10-16 02:41:03,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:03,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:41:03,542 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:41:03,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:03,542 INFO L82 PathProgramCache]: Analyzing trace with hash -986570111, now seen corresponding path program 1 times [2021-10-16 02:41:03,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:41:03,543 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1785606150] [2021-10-16 02:41:03,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:03,543 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:41:03,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:41:03,549 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:41:03,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:41:03,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:03,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:41:03,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:41:04,020 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:41:04,325 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:41:04,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1785606150] [2021-10-16 02:41:04,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1785606150] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:04,325 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2114681822] [2021-10-16 02:41:04,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:04,326 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:41:04,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:41:04,328 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:41:04,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:41:04,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:04,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:41:04,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:41:04,920 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:05,131 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:41:05,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2114681822] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:05,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738907022] [2021-10-16 02:41:05,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:05,132 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:05,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:05,138 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:05,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:41:05,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:05,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:41:05,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-16 02:41:06,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-16 02:41:06,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738907022] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:06,595 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:41:06,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 18 [2021-10-16 02:41:06,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254680145] [2021-10-16 02:41:06,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:41:06,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:41:06,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:41:06,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:41:06,598 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:12,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:12,396 INFO L93 Difference]: Finished difference Result 510 states and 706 transitions. [2021-10-16 02:41:12,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-16 02:41:12,397 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-10-16 02:41:12,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:12,401 INFO L225 Difference]: With dead ends: 510 [2021-10-16 02:41:12,401 INFO L226 Difference]: Without dead ends: 436 [2021-10-16 02:41:12,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2409.2ms TimeCoverageRelationStatistics Valid=1007, Invalid=2653, Unknown=0, NotChecked=0, Total=3660 [2021-10-16 02:41:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-10-16 02:41:12,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2021-10-16 02:41:12,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.2005494505494505) internal successors, (437), 364 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2021-10-16 02:41:12,461 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 63 [2021-10-16 02:41:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:12,462 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2021-10-16 02:41:12,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2021-10-16 02:41:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-10-16 02:41:12,469 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:12,469 INFO L512 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:12,485 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:12,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-16 02:41:12,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:13,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:41:13,085 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:41:13,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:13,086 INFO L82 PathProgramCache]: Analyzing trace with hash -2136079359, now seen corresponding path program 2 times [2021-10-16 02:41:13,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:41:13,088 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2129104079] [2021-10-16 02:41:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:41:13,088 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:41:13,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:41:13,095 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:41:13,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:41:13,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:41:13,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:41:14,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:41:14,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:14,815 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-16 02:41:14,815 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:16,019 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-16 02:41:16,019 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:41:16,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2129104079] [2021-10-16 02:41:16,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2129104079] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:16,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1150457074] [2021-10-16 02:41:16,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:41:16,021 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:41:16,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:41:16,022 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:41:16,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:41:17,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:41:17,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:41:17,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:41:17,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-16 02:41:18,280 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-16 02:41:18,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1150457074] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:18,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211897776] [2021-10-16 02:41:18,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:41:18,937 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:18,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:18,939 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:18,943 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:41:20,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:41:20,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:41:20,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 605 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:41:20,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 0 proven. 1853 refuted. 0 times theorem prover too weak. 5441 trivial. 0 not checked. [2021-10-16 02:41:21,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:22,457 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 0 proven. 1853 refuted. 0 times theorem prover too weak. 5441 trivial. 0 not checked. [2021-10-16 02:41:22,458 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211897776] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:22,458 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:41:22,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 5, 5] total 24 [2021-10-16 02:41:22,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945589174] [2021-10-16 02:41:22,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-16 02:41:22,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:41:22,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-16 02:41:22,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:41:22,462 INFO L87 Difference]: Start difference. First operand 365 states and 437 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:33,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:33,822 INFO L93 Difference]: Finished difference Result 1502 states and 2144 transitions. [2021-10-16 02:41:33,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-16 02:41:33,823 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-10-16 02:41:33,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:33,832 INFO L225 Difference]: With dead ends: 1502 [2021-10-16 02:41:33,832 INFO L226 Difference]: Without dead ends: 1148 [2021-10-16 02:41:33,845 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1518 GetRequests, 1406 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 7265.6ms TimeCoverageRelationStatistics Valid=2944, Invalid=9938, Unknown=0, NotChecked=0, Total=12882 [2021-10-16 02:41:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-10-16 02:41:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1121. [2021-10-16 02:41:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.1330357142857144) internal successors, (1269), 1120 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1269 transitions. [2021-10-16 02:41:34,005 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1269 transitions. Word has length 239 [2021-10-16 02:41:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:34,006 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1269 transitions. [2021-10-16 02:41:34,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:34,007 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1269 transitions. [2021-10-16 02:41:34,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-10-16 02:41:34,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:34,043 INFO L512 BasicCegarLoop]: trace histogram [504, 168, 36, 36, 36, 12, 12, 12, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:34,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:34,264 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:34,537 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:34,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:34,659 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:41:34,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:34,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1126566913, now seen corresponding path program 3 times [2021-10-16 02:41:34,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:41:34,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1075259295] [2021-10-16 02:41:34,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:41:34,663 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:41:34,663 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:41:34,664 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:41:34,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:41:38,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-16 02:41:38,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:41:38,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:41:38,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:40,707 INFO L134 CoverageAnalysis]: Checked inductivity of 163328 backedges. 7922 proven. 105 refuted. 0 times theorem prover too weak. 155301 trivial. 0 not checked. [2021-10-16 02:41:40,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:43,662 INFO L134 CoverageAnalysis]: Checked inductivity of 163328 backedges. 7922 proven. 105 refuted. 0 times theorem prover too weak. 155301 trivial. 0 not checked. [2021-10-16 02:41:43,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:41:43,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1075259295] [2021-10-16 02:41:43,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1075259295] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:43,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1084449172] [2021-10-16 02:41:43,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:41:43,664 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:41:43,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:41:43,670 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:41:43,703 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:41:52,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 134 [2021-10-16 02:41:52,873 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() [2021-10-16 02:41:52,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-10-16 02:41:53,075 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:41:53,076 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.annotateAndAssertOutsideLoopFirst2(AnnotateAndAsserterWithStmtOrderPrioritization.java:277) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserterWithStmtOrderPrioritization.java:214) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:312) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 32 more Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 40 more [2021-10-16 02:41:53,080 INFO L168 Benchmark]: Toolchain (without parser) took 57111.15 ms. Allocated memory was 69.2 MB in the beginning and 94.4 MB in the end (delta: 25.2 MB). Free memory was 46.9 MB in the beginning and 26.7 MB in the end (delta: 20.1 MB). Peak memory consumption was 45.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:53,081 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory is still 34.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:41:53,081 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.87 ms. Allocated memory is still 69.2 MB. Free memory was 46.8 MB in the beginning and 52.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:53,082 INFO L168 Benchmark]: Boogie Procedure Inliner took 74.73 ms. Allocated memory is still 69.2 MB. Free memory was 52.5 MB in the beginning and 50.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:53,082 INFO L168 Benchmark]: Boogie Preprocessor took 37.50 ms. Allocated memory is still 69.2 MB. Free memory was 50.8 MB in the beginning and 49.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:41:53,083 INFO L168 Benchmark]: RCFGBuilder took 662.33 ms. Allocated memory is still 69.2 MB. Free memory was 49.4 MB in the beginning and 37.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:53,083 INFO L168 Benchmark]: TraceAbstraction took 55990.99 ms. Allocated memory was 69.2 MB in the beginning and 94.4 MB in the end (delta: 25.2 MB). Free memory was 37.0 MB in the beginning and 26.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:53,086 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 54.5 MB. Free memory is still 34.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.87 ms. Allocated memory is still 69.2 MB. Free memory was 46.8 MB in the beginning and 52.5 MB in the end (delta: -5.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 74.73 ms. Allocated memory is still 69.2 MB. Free memory was 52.5 MB in the beginning and 50.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 37.50 ms. Allocated memory is still 69.2 MB. Free memory was 50.8 MB in the beginning and 49.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 662.33 ms. Allocated memory is still 69.2 MB. Free memory was 49.4 MB in the beginning and 37.5 MB in the end (delta: 11.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 55990.99 ms. Allocated memory was 69.2 MB in the beginning and 94.4 MB in the end (delta: 25.2 MB). Free memory was 37.0 MB in the beginning and 26.7 MB in the end (delta: 10.3 MB). Peak memory consumption was 37.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() : de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:41:53,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_75cceba1-40ff-48b7-9c7b-76946f1c65cb/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...