./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/init-2-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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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 0cb0e77f89daac547c42b2171c72b94010312494 .................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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 0cb0e77f89daac547c42b2171c72b94010312494 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11) 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 02:52:34,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:52:34,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:52:34,637 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:52:34,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:52:34,642 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:52:34,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:52:34,649 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:52:34,652 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:52:34,660 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:52:34,662 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:52:34,664 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:52:34,664 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:52:34,667 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:52:34,670 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:52:34,676 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:52:34,678 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:52:34,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:52:34,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:52:34,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:52:34,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:52:34,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:52:34,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:52:34,701 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:52:34,705 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:52:34,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:52:34,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:52:34,708 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:52:34,709 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:52:34,711 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:52:34,712 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:52:34,713 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:52:34,715 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:52:34,717 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:52:34,718 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:52:34,719 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:52:34,720 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:52:34,720 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:52:34,720 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:52:34,721 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:52:34,722 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:52:34,723 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:52:34,776 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:52:34,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:52:34,778 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:52:34,778 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:52:34,778 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:52:34,779 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:52:34,779 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:52:34,779 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:52:34,779 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:52:34,780 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:52:34,781 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:52:34,781 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:52:34,781 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:52:34,782 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:52:34,782 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:52:34,783 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:52:34,783 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:52:34,783 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:52:34,784 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:52:34,784 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:52:34,784 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:52:34,784 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:52:34,784 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:52:34,785 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:52:34,785 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:52:34,785 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:52:34,785 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:52:34,786 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:52:34,786 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:52:34,788 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:52:34,788 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:52:34,788 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:52:34,789 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:52:34,789 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:52:34,789 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:52:34,789 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:52:34,790 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:52:34,790 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:52:34,790 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:52:34,790 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cb0e77f89daac547c42b2171c72b94010312494 [2021-10-16 02:52:35,108 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:52:35,141 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:52:35,144 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:52:35,145 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:52:35,146 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:52:35,147 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2021-10-16 02:52:35,211 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data/bb6d4f665/039e49da77bc463e88d58bee45d8d738/FLAGce6fef52a [2021-10-16 02:52:35,636 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:52:35,639 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2021-10-16 02:52:35,649 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data/bb6d4f665/039e49da77bc463e88d58bee45d8d738/FLAGce6fef52a [2021-10-16 02:52:36,017 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data/bb6d4f665/039e49da77bc463e88d58bee45d8d738 [2021-10-16 02:52:36,020 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:52:36,021 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:52:36,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:52:36,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:52:36,026 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:52:36,027 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,028 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@521283b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36, skipping insertion in model container [2021-10-16 02:52:36,029 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,036 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:52:36,050 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:52:36,204 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2021-10-16 02:52:36,231 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:52:36,244 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:52:36,257 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2021-10-16 02:52:36,272 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:52:36,297 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:52:36,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36 WrapperNode [2021-10-16 02:52:36,298 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:52:36,300 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:52:36,301 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:52:36,301 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:52:36,309 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,317 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,342 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:52:36,343 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:52:36,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:52:36,344 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:52:36,353 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,353 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,367 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,369 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,373 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,379 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,387 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,394 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:52:36,395 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:52:36,399 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:52:36,399 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:52:36,400 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (1/1) ... [2021-10-16 02:52:36,408 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:52:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:52:36,438 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:52:36,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:52:36,489 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:52:36,490 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:52:36,491 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:52:36,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:52:36,492 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:52:36,492 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:52:36,492 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:52:36,807 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:52:36,807 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 02:52:36,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:52:36 BoogieIcfgContainer [2021-10-16 02:52:36,810 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:52:36,812 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:52:36,812 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:52:36,815 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:52:36,816 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:52:36" (1/3) ... [2021-10-16 02:52:36,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492c371e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:52:36, skipping insertion in model container [2021-10-16 02:52:36,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:36" (2/3) ... [2021-10-16 02:52:36,817 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@492c371e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:52:36, skipping insertion in model container [2021-10-16 02:52:36,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:52:36" (3/3) ... [2021-10-16 02:52:36,819 INFO L111 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2021-10-16 02:52:36,825 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:52:36,825 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:52:36,876 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:52:36,883 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 02:52:36,883 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:52:36,897 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 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 02:52:36,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:52:36,902 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:36,903 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:52:36,903 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:52:36,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:36,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1361640078, now seen corresponding path program 1 times [2021-10-16 02:52:36,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:52:36,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329418961] [2021-10-16 02:52:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:36,930 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:52:37,016 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:52:37,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1695847145] [2021-10-16 02:52:37,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:37,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:37,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:52:37,019 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:52:37,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:52:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:52:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:52:37,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:37,208 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 02:52:37,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:37,233 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 02:52:37,233 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:52:37,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329418961] [2021-10-16 02:52:37,234 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:52:37,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695847145] [2021-10-16 02:52:37,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695847145] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:52:37,236 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:52:37,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:52:37,238 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231416745] [2021-10-16 02:52:37,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:52:37,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:52:37,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:52:37,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:52:37,259 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 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 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 02:52:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:52:37,326 INFO L93 Difference]: Finished difference Result 20 states and 29 transitions. [2021-10-16 02:52:37,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:52:37,328 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 6 [2021-10-16 02:52:37,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:52:37,336 INFO L225 Difference]: With dead ends: 20 [2021-10-16 02:52:37,336 INFO L226 Difference]: Without dead ends: 12 [2021-10-16 02:52:37,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:52:37,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-16 02:52:37,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-16 02:52:37,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 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 02:52:37,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-10-16 02:52:37,370 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 6 [2021-10-16 02:52:37,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:52:37,370 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-10-16 02:52:37,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 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 02:52:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-10-16 02:52:37,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:52:37,371 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:37,372 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:52:37,401 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:37,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:37,587 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:52:37,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:37,588 INFO L82 PathProgramCache]: Analyzing trace with hash 830437686, now seen corresponding path program 1 times [2021-10-16 02:52:37,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:52:37,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503374655] [2021-10-16 02:52:37,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:37,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:52:37,601 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:52:37,603 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1917432559] [2021-10-16 02:52:37,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:37,604 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:37,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:52:37,605 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:52:37,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:52:37,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:52:37,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:52:37,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:37,805 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 02:52:37,810 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:37,860 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 02:52:37,860 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:52:37,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503374655] [2021-10-16 02:52:37,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:52:37,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917432559] [2021-10-16 02:52:37,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1917432559] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:52:37,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:52:37,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:52:37,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969244986] [2021-10-16 02:52:37,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:52:37,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:52:37,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:52:37,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:52:37,866 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 02:52:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:52:37,913 INFO L93 Difference]: Finished difference Result 32 states and 45 transitions. [2021-10-16 02:52:37,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:52:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 10 [2021-10-16 02:52:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:52:37,915 INFO L225 Difference]: With dead ends: 32 [2021-10-16 02:52:37,915 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:52:37,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 23.0ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:52:37,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:52:37,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-10-16 02:52:37,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 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 02:52:37,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-10-16 02:52:37,922 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 10 [2021-10-16 02:52:37,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:52:37,922 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-10-16 02:52:37,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 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 02:52:37,923 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-10-16 02:52:37,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:52:37,923 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:37,923 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-16 02:52:37,961 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:38,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:38,140 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:52:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash 2117943862, now seen corresponding path program 1 times [2021-10-16 02:52:38,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:52:38,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772293685] [2021-10-16 02:52:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:38,142 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:52:38,148 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:52:38,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828580847] [2021-10-16 02:52:38,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:38,149 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:38,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:52:38,151 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:52:38,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:52:38,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:52:38,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:52:38,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:52:38,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:52:38,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:52:38,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772293685] [2021-10-16 02:52:38,474 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:52:38,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828580847] [2021-10-16 02:52:38,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828580847] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:38,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1085509964] [2021-10-16 02:52:38,505 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-16 02:52:38,505 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:52:38,514 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:52:38,520 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:52:38,521 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:52:38,571 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:52:38,575 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:52:38,576 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:52:38,577 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 19 [2021-10-16 02:52:38,585 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:52:38,588 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:52:38,589 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 69 [2021-10-16 02:52:38,595 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 176 [2021-10-16 02:52:38,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:52:38,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:52:38,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:52:38,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:52:38,742 INFO L354 Elim1Store]: treesize reduction 141, result has 10.2 percent of original size [2021-10-16 02:52:38,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 5 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 12 case distinctions, treesize of input 63 treesize of output 62 [2021-10-16 02:52:38,744 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:52:38,749 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-16 02:52:38,751 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:52:38,753 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 50 [2021-10-16 02:52:38,753 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:52:38,755 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:52:38,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:52:38,876 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:52:38,881 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 154 [2021-10-16 02:52:38,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:52:38,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:173, output treesize:154 [2021-10-16 02:52:38,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:39,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:39,098 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_13| 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 02:52:39,102 INFO L168 Benchmark]: Toolchain (without parser) took 3080.01 ms. Allocated memory was 83.9 MB in the beginning and 111.1 MB in the end (delta: 27.3 MB). Free memory was 45.0 MB in the beginning and 47.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 23.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:39,102 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 83.9 MB. Free memory is still 61.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:52:39,103 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.32 ms. Allocated memory was 83.9 MB in the beginning and 111.1 MB in the end (delta: 27.3 MB). Free memory was 44.8 MB in the beginning and 87.0 MB in the end (delta: -42.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:39,104 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.40 ms. Allocated memory is still 111.1 MB. Free memory was 87.0 MB in the beginning and 85.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:39,105 INFO L168 Benchmark]: Boogie Preprocessor took 51.24 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 84.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:39,105 INFO L168 Benchmark]: RCFGBuilder took 414.30 ms. Allocated memory is still 111.1 MB. Free memory was 84.0 MB in the beginning and 71.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:39,106 INFO L168 Benchmark]: TraceAbstraction took 2289.23 ms. Allocated memory is still 111.1 MB. Free memory was 71.4 MB in the beginning and 47.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:52:39,116 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 83.9 MB. Free memory is still 61.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 275.32 ms. Allocated memory was 83.9 MB in the beginning and 111.1 MB in the end (delta: 27.3 MB). Free memory was 44.8 MB in the beginning and 87.0 MB in the end (delta: -42.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.40 ms. Allocated memory is still 111.1 MB. Free memory was 87.0 MB in the beginning and 85.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.24 ms. Allocated memory is still 111.1 MB. Free memory was 85.2 MB in the beginning and 84.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 414.30 ms. Allocated memory is still 111.1 MB. Free memory was 84.0 MB in the beginning and 71.8 MB in the end (delta: 12.1 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2289.23 ms. Allocated memory is still 111.1 MB. Free memory was 71.4 MB in the beginning and 47.3 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_13| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_13|: 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 02:52:39,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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 02:52:41,706 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:52:41,710 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:52:41,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:52:41,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:52:41,772 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:52:41,774 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:52:41,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:52:41,782 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:52:41,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:52:41,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:52:41,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:52:41,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:52:41,800 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:52:41,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:52:41,808 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:52:41,810 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:52:41,811 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:52:41,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:52:41,823 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:52:41,825 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:52:41,827 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:52:41,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:52:41,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:52:41,836 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:52:41,837 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:52:41,837 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:52:41,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:52:41,840 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:52:41,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:52:41,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:52:41,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:52:41,845 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:52:41,846 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:52:41,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:52:41,849 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:52:41,850 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:52:41,850 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:52:41,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:52:41,852 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:52:41,853 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:52:41,854 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:52:41,884 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:52:41,884 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:52:41,886 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:52:41,886 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:52:41,886 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:52:41,886 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:52:41,886 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:52:41,887 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:52:41,887 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:52:41,888 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:52:41,889 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:52:41,890 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:52:41,890 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:52:41,890 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:52:41,890 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:52:41,890 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:52:41,891 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:52:41,891 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:52:41,891 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:52:41,891 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:52:41,891 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:52:41,892 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:52:41,892 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:52:41,892 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:52:41,892 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:52:41,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:52:41,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:52:41,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:52:41,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:52:41,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:52:41,894 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:52:41,894 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:52:41,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:52:41,894 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:52:41,895 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:52:41,895 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0cb0e77f89daac547c42b2171c72b94010312494 [2021-10-16 02:52:42,273 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:52:42,299 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:52:42,302 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:52:42,304 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:52:42,304 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:52:42,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2021-10-16 02:52:42,371 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data/ccb103e02/5fa752f3fce247069d2a23bb62b19246/FLAG473f2b600 [2021-10-16 02:52:42,873 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:52:42,874 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/sv-benchmarks/c/array-multidimensional/init-2-n-u.c [2021-10-16 02:52:42,882 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data/ccb103e02/5fa752f3fce247069d2a23bb62b19246/FLAG473f2b600 [2021-10-16 02:52:43,252 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/data/ccb103e02/5fa752f3fce247069d2a23bb62b19246 [2021-10-16 02:52:43,255 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:52:43,256 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:52:43,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:52:43,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:52:43,262 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:52:43,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,264 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@672d7512 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43, skipping insertion in model container [2021-10-16 02:52:43,264 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,271 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:52:43,287 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:52:43,419 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2021-10-16 02:52:43,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:52:43,457 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:52:43,476 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/sv-benchmarks/c/array-multidimensional/init-2-n-u.c[322,335] [2021-10-16 02:52:43,493 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:52:43,523 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:52:43,523 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43 WrapperNode [2021-10-16 02:52:43,523 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:52:43,524 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:52:43,524 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:52:43,525 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:52:43,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,541 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,573 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:52:43,574 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:52:43,574 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:52:43,574 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:52:43,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,591 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,606 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,606 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,612 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,616 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,618 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,620 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:52:43,621 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:52:43,622 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:52:43,622 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:52:43,623 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (1/1) ... [2021-10-16 02:52:43,630 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:52:43,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:52:43,657 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:52:43,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:52:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:52:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:52:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:52:43,702 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:52:43,703 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:52:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:52:43,703 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:52:43,970 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:52:43,970 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-16 02:52:43,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:52:43 BoogieIcfgContainer [2021-10-16 02:52:43,972 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:52:43,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:52:43,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:52:43,977 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:52:43,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:52:43" (1/3) ... [2021-10-16 02:52:43,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c543017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:52:43, skipping insertion in model container [2021-10-16 02:52:43,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:52:43" (2/3) ... [2021-10-16 02:52:43,978 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c543017 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:52:43, skipping insertion in model container [2021-10-16 02:52:43,979 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:52:43" (3/3) ... [2021-10-16 02:52:43,980 INFO L111 eAbstractionObserver]: Analyzing ICFG init-2-n-u.c [2021-10-16 02:52:43,985 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:52:43,986 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:52:44,033 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:52:44,040 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 02:52:44,040 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:52:44,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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 02:52:44,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:52:44,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:44,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:52:44,060 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:52:44,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:44,065 INFO L82 PathProgramCache]: Analyzing trace with hash 252221889, now seen corresponding path program 1 times [2021-10-16 02:52:44,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:52:44,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1514142838] [2021-10-16 02:52:44,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:44,079 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:52:44,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:52:44,082 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:52:44,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:52:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:52:44,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:52:44,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:44,407 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 02:52:44,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:44,461 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 02:52:44,462 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:52:44,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1514142838] [2021-10-16 02:52:44,463 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1514142838] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:52:44,464 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:52:44,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:52:44,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170193509] [2021-10-16 02:52:44,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:52:44,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:52:44,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:52:44,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:52:44,494 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 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), 4 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 02:52:44,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:52:44,595 INFO L93 Difference]: Finished difference Result 36 states and 58 transitions. [2021-10-16 02:52:44,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:52:44,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 02:52:44,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:52:44,606 INFO L225 Difference]: With dead ends: 36 [2021-10-16 02:52:44,606 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 02:52:44,611 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:52:44,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 02:52:44,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-16 02:52:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 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 02:52:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-16 02:52:44,647 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 8 [2021-10-16 02:52:44,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:52:44,648 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-16 02:52:44,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 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 02:52:44,648 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-16 02:52:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-16 02:52:44,649 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:44,650 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:52:44,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:44,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:52:44,868 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:52:44,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:44,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1647448607, now seen corresponding path program 1 times [2021-10-16 02:52:44,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:52:44,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1152739213] [2021-10-16 02:52:44,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:44,871 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:52:44,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:52:44,872 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:52:44,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:52:44,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:52:44,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:52:44,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:45,031 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 02:52:45,031 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:45,119 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 02:52:45,121 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:52:45,121 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1152739213] [2021-10-16 02:52:45,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1152739213] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:52:45,121 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:52:45,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:52:45,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460611520] [2021-10-16 02:52:45,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:52:45,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:52:45,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:52:45,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:52:45,126 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 02:52:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:52:45,262 INFO L93 Difference]: Finished difference Result 41 states and 54 transitions. [2021-10-16 02:52:45,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:52:45,263 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 14 [2021-10-16 02:52:45,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:52:45,264 INFO L225 Difference]: With dead ends: 41 [2021-10-16 02:52:45,264 INFO L226 Difference]: Without dead ends: 28 [2021-10-16 02:52:45,265 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:52:45,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-16 02:52:45,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-10-16 02:52:45,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:52:45,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-10-16 02:52:45,276 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 14 [2021-10-16 02:52:45,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:52:45,277 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-10-16 02:52:45,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 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 02:52:45,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-10-16 02:52:45,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-16 02:52:45,279 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:45,279 INFO L512 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:52:45,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:45,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:52:45,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:52:45,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:45,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1377549151, now seen corresponding path program 1 times [2021-10-16 02:52:45,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:52:45,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [485960816] [2021-10-16 02:52:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:45,494 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:52:45,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:52:45,495 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:52:45,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:52:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:52:45,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:52:45,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:45,786 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:52:45,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:52:45,958 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:52:45,958 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [485960816] [2021-10-16 02:52:45,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [485960816] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:45,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1359454366] [2021-10-16 02:52:45,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:45,959 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:52:45,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:52:45,965 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:52:45,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:52:46,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:52:46,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:52:46,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:52:46,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:46,275 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:52:46,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1359454366] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:46,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851461040] [2021-10-16 02:52:46,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:52:46,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:46,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:52:46,278 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:52:46,298 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:52:46,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:52:46,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:52:46,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:52:46,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:46,556 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-16 02:52:46,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851461040] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:46,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:52:46,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-10-16 02:52:46,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165553524] [2021-10-16 02:52:46,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:52:46,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:52:46,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:52:46,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:52:46,560 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 02:52:46,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:52:46,890 INFO L93 Difference]: Finished difference Result 75 states and 95 transitions. [2021-10-16 02:52:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:52:46,891 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 18 [2021-10-16 02:52:46,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:52:46,892 INFO L225 Difference]: With dead ends: 75 [2021-10-16 02:52:46,892 INFO L226 Difference]: Without dead ends: 56 [2021-10-16 02:52:46,893 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 213.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:52:46,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-16 02:52:46,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 45. [2021-10-16 02:52:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:52:46,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-10-16 02:52:46,903 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 18 [2021-10-16 02:52:46,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:52:46,903 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-10-16 02:52:46,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 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 02:52:46,904 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-10-16 02:52:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:52:46,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:46,919 INFO L512 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:52:46,965 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:47,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:47,355 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-16 02:52:47,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:52:47,548 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:52:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:47,549 INFO L82 PathProgramCache]: Analyzing trace with hash 372613665, now seen corresponding path program 2 times [2021-10-16 02:52:47,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:52:47,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1015345708] [2021-10-16 02:52:47,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:52:47,550 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:52:47,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:52:47,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:52:47,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:52:47,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:52:47,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:52:47,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:52:47,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:47,949 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-16 02:52:47,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:48,365 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-16 02:52:48,366 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:52:48,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1015345708] [2021-10-16 02:52:48,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1015345708] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:48,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1735913916] [2021-10-16 02:52:48,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:52:48,367 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:52:48,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:52:48,374 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:52:48,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 02:52:48,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:52:48,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:52:48,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:52:48,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-16 02:52:48,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:48,911 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 51 proven. 21 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-10-16 02:52:48,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1735913916] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:48,911 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431774931] [2021-10-16 02:52:48,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:52:48,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:48,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:52:48,914 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:52:48,915 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:52:49,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:52:49,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:52:49,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:52:49,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:49,375 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:52:49,376 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:49,628 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 53 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-10-16 02:52:49,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431774931] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:49,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:52:49,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 5, 5] total 24 [2021-10-16 02:52:49,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843559801] [2021-10-16 02:52:49,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-16 02:52:49,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:52:49,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-16 02:52:49,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:52:49,631 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 02:52:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:52:56,956 INFO L93 Difference]: Finished difference Result 215 states and 291 transitions. [2021-10-16 02:52:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-16 02:52:56,957 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-16 02:52:56,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:52:56,959 INFO L225 Difference]: With dead ends: 215 [2021-10-16 02:52:56,959 INFO L226 Difference]: Without dead ends: 180 [2021-10-16 02:52:56,966 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 6260.7ms TimeCoverageRelationStatistics Valid=2944, Invalid=9938, Unknown=0, NotChecked=0, Total=12882 [2021-10-16 02:52:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-10-16 02:52:56,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 153. [2021-10-16 02:52:56,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.144736842105263) internal successors, (174), 152 states have internal predecessors, (174), 0 states have call successors, (0), 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 02:52:56,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 174 transitions. [2021-10-16 02:52:56,993 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 174 transitions. Word has length 26 [2021-10-16 02:52:56,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:52:56,993 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 174 transitions. [2021-10-16 02:52:56,994 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 0 states have call successors, (0), 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 02:52:56,994 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 174 transitions. [2021-10-16 02:52:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-10-16 02:52:56,998 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:52:56,998 INFO L512 BasicCegarLoop]: trace histogram [84, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:52:57,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:57,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:57,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:52:57,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:52:57,615 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:52:57,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:52:57,616 INFO L82 PathProgramCache]: Analyzing trace with hash -540304415, now seen corresponding path program 3 times [2021-10-16 02:52:57,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:52:57,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [686735179] [2021-10-16 02:52:57,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:52:57,617 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:52:57,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:52:57,618 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:52:57,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:52:58,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-10-16 02:52:58,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:52:58,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:52:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:52:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4041 backedges. 1131 proven. 105 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2021-10-16 02:52:58,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:52:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4041 backedges. 1131 proven. 105 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2021-10-16 02:52:59,698 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:52:59,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [686735179] [2021-10-16 02:52:59,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [686735179] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:52:59,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [500131945] [2021-10-16 02:52:59,698 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:52:59,698 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:52:59,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:52:59,699 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:52:59,700 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 02:53:00,515 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11) 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 02:53:00,517 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 134 [2021-10-16 02:53:00,527 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:53:00,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:53:00,717 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11) 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11) 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 02:53:00,722 INFO L168 Benchmark]: Toolchain (without parser) took 17464.48 ms. Allocated memory was 58.7 MB in the beginning and 98.6 MB in the end (delta: 39.8 MB). Free memory was 36.8 MB in the beginning and 57.9 MB in the end (delta: -21.1 MB). Peak memory consumption was 19.8 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:00,723 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 58.7 MB. Free memory was 39.8 MB in the beginning and 39.7 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:53:00,724 INFO L168 Benchmark]: CACSL2BoogieTranslator took 265.83 ms. Allocated memory is still 58.7 MB. Free memory was 36.5 MB in the beginning and 42.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:00,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.56 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 42.0 MB in the beginning and 65.0 MB in the end (delta: -23.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:00,725 INFO L168 Benchmark]: Boogie Preprocessor took 46.67 ms. Allocated memory is still 81.8 MB. Free memory was 65.0 MB in the beginning and 63.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:00,725 INFO L168 Benchmark]: RCFGBuilder took 350.81 ms. Allocated memory is still 81.8 MB. Free memory was 63.8 MB in the beginning and 53.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:00,726 INFO L168 Benchmark]: TraceAbstraction took 16746.31 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 53.0 MB in the beginning and 57.9 MB in the end (delta: -4.8 MB). Peak memory consumption was 14.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:53:00,729 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 58.7 MB. Free memory was 39.8 MB in the beginning and 39.7 MB in the end (delta: 44.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 265.83 ms. Allocated memory is still 58.7 MB. Free memory was 36.5 MB in the beginning and 42.0 MB in the end (delta: -5.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.56 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 42.0 MB in the beginning and 65.0 MB in the end (delta: -23.0 MB). Peak memory consumption was 4.4 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.67 ms. Allocated memory is still 81.8 MB. Free memory was 65.0 MB in the beginning and 63.8 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 350.81 ms. Allocated memory is still 81.8 MB. Free memory was 63.8 MB in the beginning and 53.6 MB in the end (delta: 10.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16746.31 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 53.0 MB in the beginning and 57.9 MB in the end (delta: -4.8 MB). Peak memory consumption was 14.2 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11) 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_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11) 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 02:53:00,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c68b2efb-fe4a-4ab0-b73b-688328573eaf/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...