./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/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_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/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_802c0926-6d04-4f95-b2c5-023035851882/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 94e2286a7654821b8ac3351857e28e75cf30c725 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/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_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/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_802c0926-6d04-4f95-b2c5-023035851882/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 94e2286a7654821b8ac3351857e28e75cf30c725 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:41:48,409 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:41:48,413 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:41:48,489 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:41:48,490 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:41:48,496 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:41:48,498 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:41:48,504 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:41:48,507 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:41:48,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:41:48,520 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:41:48,522 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:41:48,523 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:41:48,527 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:41:48,530 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:41:48,537 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:41:48,539 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:41:48,541 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:41:48,548 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:41:48,554 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:41:48,560 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:41:48,563 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:41:48,567 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:41:48,568 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:41:48,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:41:48,577 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:41:48,577 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:41:48,580 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:41:48,581 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:41:48,583 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:41:48,583 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:41:48,584 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:41:48,587 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:41:48,589 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:41:48,591 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:41:48,591 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:41:48,592 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:41:48,593 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:41:48,593 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:41:48,594 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:41:48,595 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:41:48,596 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:41:48,638 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:41:48,638 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:41:48,640 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:41:48,640 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:41:48,640 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:41:48,641 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:41:48,641 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:41:48,641 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:41:48,641 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:41:48,642 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:41:48,642 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:41:48,642 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:41:48,643 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:41:48,643 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:41:48,643 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:41:48,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:41:48,644 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:41:48,645 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:41:48,645 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:41:48,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:41:48,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:41:48,646 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:41:48,646 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:41:48,646 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:41:48,647 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:41:48,647 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:41:48,647 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:41:48,647 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:41:48,648 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:41:48,648 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:41:48,648 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:41:48,649 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:41:48,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:41:48,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:41:48,649 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:41:48,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:41:48,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:41:48,650 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:41:48,651 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:41:48,651 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_802c0926-6d04-4f95-b2c5-023035851882/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94e2286a7654821b8ac3351857e28e75cf30c725 [2021-10-16 02:41:48,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:41:48,967 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:41:48,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:41:48,972 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:41:48,973 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:41:48,974 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-10-16 02:41:49,048 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data/26079f3bc/1c15fd3b6552481f9125dbeb99b04c44/FLAGa7feb7f58 [2021-10-16 02:41:49,636 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:41:49,636 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-10-16 02:41:49,644 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data/26079f3bc/1c15fd3b6552481f9125dbeb99b04c44/FLAGa7feb7f58 [2021-10-16 02:41:49,969 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data/26079f3bc/1c15fd3b6552481f9125dbeb99b04c44 [2021-10-16 02:41:49,972 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:41:49,974 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:41:49,976 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:41:49,976 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:41:49,980 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:41:49,981 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:41:49" (1/1) ... [2021-10-16 02:41:49,983 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d9d59bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:49, skipping insertion in model container [2021-10-16 02:41:49,983 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:41:49" (1/1) ... [2021-10-16 02:41:50,004 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:41:50,030 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:41:50,206 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_802c0926-6d04-4f95-b2c5-023035851882/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-10-16 02:41:50,236 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:41:50,245 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:41:50,276 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_802c0926-6d04-4f95-b2c5-023035851882/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-10-16 02:41:50,304 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:41:50,319 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:41:50,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50 WrapperNode [2021-10-16 02:41:50,320 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:41:50,320 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:41:50,321 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:41:50,321 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:41:50,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,337 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,368 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:41:50,369 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:41:50,370 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:41:50,370 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:41:50,381 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,385 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,385 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,393 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,416 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,421 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:41:50,422 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:41:50,423 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:41:50,423 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:41:50,424 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (1/1) ... [2021-10-16 02:41:50,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:41:50,457 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:50,473 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:41:50,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:41:50,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:41:50,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:41:50,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-16 02:41:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:41:50,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:41:50,529 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-16 02:41:50,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:41:51,074 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:41:51,075 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-16 02:41:51,078 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:41:51 BoogieIcfgContainer [2021-10-16 02:41:51,078 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:41:51,080 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:41:51,080 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:41:51,087 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:41:51,088 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:41:49" (1/3) ... [2021-10-16 02:41:51,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46228528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:41:51, skipping insertion in model container [2021-10-16 02:41:51,089 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:50" (2/3) ... [2021-10-16 02:41:51,089 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46228528 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:41:51, skipping insertion in model container [2021-10-16 02:41:51,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:41:51" (3/3) ... [2021-10-16 02:41:51,091 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2021-10-16 02:41:51,097 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:41:51,097 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:41:51,162 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:41:51,171 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 02:41:51,171 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:41:51,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:51,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:41:51,194 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:51,194 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:51,195 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:41:51,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:51,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2125816706, now seen corresponding path program 1 times [2021-10-16 02:41:51,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:41:51,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910544830] [2021-10-16 02:41:51,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:51,215 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:41:51,304 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:41:51,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [728231333] [2021-10-16 02:41:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:51,305 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:51,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:51,308 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:51,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:41:51,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:51,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:41:51,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:41:51,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:51,726 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 02:41:51,726 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:41:51,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910544830] [2021-10-16 02:41:51,729 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:41:51,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728231333] [2021-10-16 02:41:51,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728231333] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:41:51,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:41:51,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:41:51,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158258813] [2021-10-16 02:41:51,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:41:51,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:41:51,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:41:51,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:41:51,769 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:51,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:51,859 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2021-10-16 02:41:51,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:41:51,862 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:41:51,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:51,872 INFO L225 Difference]: With dead ends: 30 [2021-10-16 02:41:51,872 INFO L226 Difference]: Without dead ends: 18 [2021-10-16 02:41:51,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:41:51,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-16 02:41:51,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-16 02:41:51,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2021-10-16 02:41:51,926 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 8 [2021-10-16 02:41:51,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:51,926 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2021-10-16 02:41:51,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2021-10-16 02:41:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:41:51,930 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:51,930 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:51,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:52,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-16 02:41:52,158 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:41:52,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:52,159 INFO L82 PathProgramCache]: Analyzing trace with hash -442463060, now seen corresponding path program 1 times [2021-10-16 02:41:52,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:41:52,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43996293] [2021-10-16 02:41:52,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:52,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:41:52,173 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:41:52,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1012096278] [2021-10-16 02:41:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:52,177 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:52,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:52,182 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:52,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:41:52,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:52,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:41:52,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:52,395 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 02:41:52,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:52,470 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 02:41:52,471 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:41:52,471 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43996293] [2021-10-16 02:41:52,472 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:41:52,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012096278] [2021-10-16 02:41:52,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012096278] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:41:52,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:41:52,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:41:52,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572113265] [2021-10-16 02:41:52,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:41:52,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:41:52,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:41:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:41:52,486 INFO L87 Difference]: Start difference. First operand 18 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:52,651 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2021-10-16 02:41:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:41:52,652 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-16 02:41:52,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:52,661 INFO L225 Difference]: With dead ends: 50 [2021-10-16 02:41:52,661 INFO L226 Difference]: Without dead ends: 36 [2021-10-16 02:41:52,663 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 35.7ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:41:52,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-16 02:41:52,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-10-16 02:41:52,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.5161290322580645) internal successors, (47), 31 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:52,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2021-10-16 02:41:52,688 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 12 [2021-10-16 02:41:52,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:52,689 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2021-10-16 02:41:52,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:52,690 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2021-10-16 02:41:52,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:41:52,691 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:52,692 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:52,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:52,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-10-16 02:41:52,906 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:41:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1397145300, now seen corresponding path program 1 times [2021-10-16 02:41:52,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:41:52,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060614800] [2021-10-16 02:41:52,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:52,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:41:52,914 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:41:52,915 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [349604630] [2021-10-16 02:41:52,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:52,915 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:52,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:52,916 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:52,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:41:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:53,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:41:53,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:53,096 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:41:53,096 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:53,174 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-16 02:41:53,174 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:41:53,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060614800] [2021-10-16 02:41:53,175 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:41:53,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349604630] [2021-10-16 02:41:53,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349604630] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:41:53,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:41:53,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-16 02:41:53,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053911444] [2021-10-16 02:41:53,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:41:53,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:41:53,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:41:53,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:41:53,178 INFO L87 Difference]: Start difference. First operand 32 states and 47 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:53,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:41:53,297 INFO L93 Difference]: Finished difference Result 84 states and 131 transitions. [2021-10-16 02:41:53,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:41:53,298 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-10-16 02:41:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:41:53,301 INFO L225 Difference]: With dead ends: 84 [2021-10-16 02:41:53,301 INFO L226 Difference]: Without dead ends: 56 [2021-10-16 02:41:53,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:41:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-16 02:41:53,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-16 02:41:53,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.3529411764705883) internal successors, (69), 51 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2021-10-16 02:41:53,330 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2021-10-16 02:41:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:41:53,332 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2021-10-16 02:41:53,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:41:53,333 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2021-10-16 02:41:53,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-16 02:41:53,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:41:53,336 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:41:53,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:53,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:53,558 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:41:53,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:41:53,559 INFO L82 PathProgramCache]: Analyzing trace with hash 153382700, now seen corresponding path program 1 times [2021-10-16 02:41:53,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:41:53,559 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621132376] [2021-10-16 02:41:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:53,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:41:53,569 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:41:53,569 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [968191151] [2021-10-16 02:41:53,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:41:53,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:53,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:41:53,571 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:41:53,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-16 02:41:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:41:53,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:41:53,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:41:53,818 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:41:53,818 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:41:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-16 02:41:53,939 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:41:53,939 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621132376] [2021-10-16 02:41:53,940 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:41:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968191151] [2021-10-16 02:41:53,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968191151] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:41:53,940 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [126340839] [2021-10-16 02:41:53,973 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-16 02:41:53,973 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:41:53,979 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:41:53,986 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:41:53,986 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:41:54,033 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:41:54,038 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:41:54,039 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:41:54,040 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-16 02:41:54,045 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:41:54,046 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:41:54,047 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-16 02:41:54,053 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-10-16 02:41:54,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:41:54,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:41:54,137 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:41:54,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:41:54,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:41:54,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:41:54,498 INFO L354 Elim1Store]: treesize reduction 380, result has 6.4 percent of original size [2021-10-16 02:41:54,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 7 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 25 case distinctions, treesize of input 115 treesize of output 114 [2021-10-16 02:41:54,503 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:41:54,510 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-10-16 02:41:54,514 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:41:54,519 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-10-16 02:41:54,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:41:54,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:41:54,679 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:41:54,694 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:41:54,712 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-10-16 02:41:54,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:41:54,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:260, output treesize:238 [2021-10-16 02:41:54,760 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:41:54,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:41:54,930 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_15| 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 02:41:54,934 INFO L168 Benchmark]: Toolchain (without parser) took 4959.03 ms. Allocated memory was 107.0 MB in the beginning and 136.3 MB in the end (delta: 29.4 MB). Free memory was 75.1 MB in the beginning and 51.3 MB in the end (delta: 23.8 MB). Peak memory consumption was 53.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:54,934 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 58.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:41:54,935 INFO L168 Benchmark]: CACSL2BoogieTranslator took 343.69 ms. Allocated memory is still 107.0 MB. Free memory was 74.9 MB in the beginning and 82.2 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:54,935 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.26 ms. Allocated memory is still 107.0 MB. Free memory was 82.0 MB in the beginning and 80.3 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:41:54,936 INFO L168 Benchmark]: Boogie Preprocessor took 51.95 ms. Allocated memory is still 107.0 MB. Free memory was 80.3 MB in the beginning and 78.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:54,937 INFO L168 Benchmark]: RCFGBuilder took 655.64 ms. Allocated memory is still 107.0 MB. Free memory was 78.8 MB in the beginning and 63.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:54,938 INFO L168 Benchmark]: TraceAbstraction took 3852.70 ms. Allocated memory was 107.0 MB in the beginning and 136.3 MB in the end (delta: 29.4 MB). Free memory was 62.4 MB in the beginning and 51.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 41.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:41:54,941 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 107.0 MB. Free memory is still 58.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 343.69 ms. Allocated memory is still 107.0 MB. Free memory was 74.9 MB in the beginning and 82.2 MB in the end (delta: -7.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 48.26 ms. Allocated memory is still 107.0 MB. Free memory was 82.0 MB in the beginning and 80.3 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.95 ms. Allocated memory is still 107.0 MB. Free memory was 80.3 MB in the beginning and 78.8 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 655.64 ms. Allocated memory is still 107.0 MB. Free memory was 78.8 MB in the beginning and 63.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3852.70 ms. Allocated memory was 107.0 MB in the beginning and 136.3 MB in the end (delta: 29.4 MB). Free memory was 62.4 MB in the beginning and 51.3 MB in the end (delta: 11.1 MB). Peak memory consumption was 41.3 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_15| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_15|: 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 02:41:54,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/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 02:41:58,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:41:58,007 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:41:58,073 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:41:58,074 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:41:58,080 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:41:58,083 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:41:58,088 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:41:58,093 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:41:58,103 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:41:58,105 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:41:58,108 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:41:58,109 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:41:58,112 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:41:58,115 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:41:58,120 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:41:58,123 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:41:58,125 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:41:58,127 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:41:58,138 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:41:58,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:41:58,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:41:58,147 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:41:58,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:41:58,160 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:41:58,161 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:41:58,161 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:41:58,164 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:41:58,165 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:41:58,166 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:41:58,167 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:41:58,168 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:41:58,171 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:41:58,172 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:41:58,174 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:41:58,175 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:41:58,176 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:41:58,177 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:41:58,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:41:58,180 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:41:58,181 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:41:58,192 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:41:58,245 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:41:58,246 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:41:58,247 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:41:58,248 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:41:58,248 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:41:58,248 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:41:58,249 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:41:58,249 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:41:58,249 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:41:58,251 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:41:58,252 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:41:58,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:41:58,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:41:58,253 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:41:58,253 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:41:58,254 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:41:58,254 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:41:58,254 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:41:58,255 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:41:58,255 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:41:58,255 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:41:58,255 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:41:58,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:41:58,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:41:58,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:41:58,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:41:58,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:41:58,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:41:58,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:41:58,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:41:58,258 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:41:58,258 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:41:58,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:41:58,259 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:41:58,260 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:41:58,260 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_802c0926-6d04-4f95-b2c5-023035851882/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 94e2286a7654821b8ac3351857e28e75cf30c725 [2021-10-16 02:41:58,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:41:58,788 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:41:58,792 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:41:58,793 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:41:58,794 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:41:58,795 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-10-16 02:41:58,875 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data/e777e6367/b130ee6e944f484c9cb76654748ee15a/FLAGa7c469672 [2021-10-16 02:41:59,482 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:41:59,483 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c [2021-10-16 02:41:59,505 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data/e777e6367/b130ee6e944f484c9cb76654748ee15a/FLAGa7c469672 [2021-10-16 02:41:59,834 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/data/e777e6367/b130ee6e944f484c9cb76654748ee15a [2021-10-16 02:41:59,838 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:41:59,841 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:41:59,845 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:41:59,846 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:41:59,850 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:41:59,851 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:41:59" (1/1) ... [2021-10-16 02:41:59,853 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58279956 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:41:59, skipping insertion in model container [2021-10-16 02:41:59,853 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:41:59" (1/1) ... [2021-10-16 02:41:59,863 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:41:59,889 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:42:00,129 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_802c0926-6d04-4f95-b2c5-023035851882/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-10-16 02:42:00,182 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:42:00,200 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:42:00,233 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_802c0926-6d04-4f95-b2c5-023035851882/sv-benchmarks/c/array-multidimensional/diff-3-n-u.c[322,335] [2021-10-16 02:42:00,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:42:00,329 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:42:00,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00 WrapperNode [2021-10-16 02:42:00,331 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:42:00,333 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:42:00,333 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:42:00,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:42:00,343 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,369 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,413 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:42:00,415 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:42:00,415 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:42:00,415 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:42:00,426 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,442 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,443 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,461 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,467 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,470 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,473 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:42:00,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:42:00,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:42:00,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:42:00,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (1/1) ... [2021-10-16 02:42:00,485 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:42:00,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:42:00,513 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:42:00,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:42:00,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:42:00,577 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:42:00,578 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-16 02:42:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:42:00,579 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:42:00,579 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-16 02:42:00,580 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-16 02:42:01,285 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:42:01,285 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-16 02:42:01,287 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:42:01 BoogieIcfgContainer [2021-10-16 02:42:01,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:42:01,294 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:42:01,294 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:42:01,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:42:01,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:41:59" (1/3) ... [2021-10-16 02:42:01,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220abce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:42:01, skipping insertion in model container [2021-10-16 02:42:01,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:42:00" (2/3) ... [2021-10-16 02:42:01,299 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@220abce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:42:01, skipping insertion in model container [2021-10-16 02:42:01,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:42:01" (3/3) ... [2021-10-16 02:42:01,301 INFO L111 eAbstractionObserver]: Analyzing ICFG diff-3-n-u.c [2021-10-16 02:42:01,307 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:42:01,308 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:42:01,378 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:42:01,389 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 02:42:01,390 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:42:01,407 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:01,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:42:01,421 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:42:01,422 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:42:01,422 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:42:01,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:42:01,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2021-10-16 02:42:01,447 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:42:01,448 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74235759] [2021-10-16 02:42:01,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:01,450 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:42:01,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:42:01,454 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:42:01,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:42:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:01,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-16 02:42:01,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:01,732 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 02:42:01,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:01,815 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 02:42:01,816 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:42:01,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74235759] [2021-10-16 02:42:01,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [74235759] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:42:01,817 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:42:01,817 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-16 02:42:01,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273123319] [2021-10-16 02:42:01,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-16 02:42:01,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:42:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-16 02:42:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:42:01,857 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.8) internal successors, (45), 26 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:01,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:42:01,875 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2021-10-16 02:42:01,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-16 02:42:01,876 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:42:01,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:42:01,884 INFO L225 Difference]: With dead ends: 52 [2021-10-16 02:42:01,885 INFO L226 Difference]: Without dead ends: 23 [2021-10-16 02:42:01,887 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-16 02:42:01,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-16 02:42:01,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-16 02:42:01,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 22 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:01,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-10-16 02:42:01,920 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2021-10-16 02:42:01,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:42:01,920 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-10-16 02:42:01,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:01,921 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-10-16 02:42:01,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-16 02:42:01,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:42:01,922 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:42:01,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:02,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:42:02,135 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:42:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:42:02,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2021-10-16 02:42:02,136 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:42:02,136 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [92754819] [2021-10-16 02:42:02,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:02,137 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:42:02,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:42:02,138 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:42:02,150 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:42:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:02,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:42:02,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:02,393 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 02:42:02,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:02,447 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 02:42:02,447 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:42:02,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [92754819] [2021-10-16 02:42:02,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [92754819] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:42:02,448 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:42:02,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:42:02,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842483588] [2021-10-16 02:42:02,453 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:42:02,453 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:42:02,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:42:02,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:42:02,455 INFO L87 Difference]: Start difference. First operand 23 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:02,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:42:02,733 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-10-16 02:42:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:42:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-10-16 02:42:02,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:42:02,741 INFO L225 Difference]: With dead ends: 45 [2021-10-16 02:42:02,741 INFO L226 Difference]: Without dead ends: 29 [2021-10-16 02:42:02,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:42:02,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-16 02:42:02,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-16 02:42:02,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:02,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-16 02:42:02,751 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2021-10-16 02:42:02,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:42:02,752 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-16 02:42:02,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:02,753 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-16 02:42:02,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-16 02:42:02,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:42:02,754 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:42:02,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-16 02:42:02,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:42:02,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:42:02,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:42:02,967 INFO L82 PathProgramCache]: Analyzing trace with hash 742035169, now seen corresponding path program 1 times [2021-10-16 02:42:02,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:42:02,967 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [111172512] [2021-10-16 02:42:02,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:02,968 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:42:02,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:42:02,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:42:02,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:42:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:03,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:42:03,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:03,242 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 02:42:03,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:03,350 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 02:42:03,351 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:42:03,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [111172512] [2021-10-16 02:42:03,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [111172512] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:42:03,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:42:03,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:42:03,352 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458285170] [2021-10-16 02:42:03,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:42:03,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:42:03,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:42:03,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:42:03,355 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:42:03,840 INFO L93 Difference]: Finished difference Result 75 states and 106 transitions. [2021-10-16 02:42:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:42:03,842 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-16 02:42:03,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:42:03,843 INFO L225 Difference]: With dead ends: 75 [2021-10-16 02:42:03,844 INFO L226 Difference]: Without dead ends: 52 [2021-10-16 02:42:03,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 49.8ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:42:03,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-16 02:42:03,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-10-16 02:42:03,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.3478260869565217) internal successors, (62), 46 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:03,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-10-16 02:42:03,863 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 17 [2021-10-16 02:42:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:42:03,864 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-10-16 02:42:03,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:03,864 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-10-16 02:42:03,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-16 02:42:03,866 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:42:03,866 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:42:03,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:04,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:42:04,068 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:42:04,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:42:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1930294047, now seen corresponding path program 1 times [2021-10-16 02:42:04,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:42:04,070 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1833799561] [2021-10-16 02:42:04,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:04,070 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:42:04,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:42:04,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:42:04,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:42:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:04,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:42:04,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:04,454 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:42:04,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-16 02:42:04,609 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:42:04,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1833799561] [2021-10-16 02:42:04,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1833799561] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:42:04,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:42:04,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-16 02:42:04,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934268608] [2021-10-16 02:42:04,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:42:04,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:42:04,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:42:04,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-16 02:42:04,617 INFO L87 Difference]: Start difference. First operand 47 states and 62 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:05,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:42:05,236 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2021-10-16 02:42:05,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:42:05,237 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-16 02:42:05,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:42:05,238 INFO L225 Difference]: With dead ends: 114 [2021-10-16 02:42:05,239 INFO L226 Difference]: Without dead ends: 72 [2021-10-16 02:42:05,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-16 02:42:05,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-16 02:42:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-10-16 02:42:05,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.2727272727272727) internal successors, (84), 66 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:05,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-10-16 02:42:05,283 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 29 [2021-10-16 02:42:05,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:42:05,283 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-10-16 02:42:05,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:05,285 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-10-16 02:42:05,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-16 02:42:05,289 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:42:05,291 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:42:05,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:05,493 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:42:05,494 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:42:05,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:42:05,495 INFO L82 PathProgramCache]: Analyzing trace with hash 863846625, now seen corresponding path program 1 times [2021-10-16 02:42:05,495 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:42:05,496 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2034331934] [2021-10-16 02:42:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:05,496 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:42:05,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:42:05,500 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:42:05,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-16 02:42:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:05,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:42:05,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:05,968 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:42:05,969 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:06,267 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:42:06,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:42:06,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2034331934] [2021-10-16 02:42:06,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2034331934] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:06,269 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1364013526] [2021-10-16 02:42:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:06,269 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:42:06,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:42:06,279 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:42:06,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-16 02:42:06,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:06,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:42:06,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:06,758 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:42:06,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:06,917 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-16 02:42:06,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1364013526] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:06,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147865962] [2021-10-16 02:42:06,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:06,919 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:42:06,919 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:42:06,927 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:42:06,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-16 02:42:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:07,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-16 02:42:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-16 02:42:07,479 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-16 02:42:07,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147865962] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:42:07,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-16 02:42:07,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-16 02:42:07,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233586382] [2021-10-16 02:42:07,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-16 02:42:07,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:42:07,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-16 02:42:07,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-16 02:42:07,714 INFO L87 Difference]: Start difference. First operand 67 states and 84 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:08,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:42:08,182 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2021-10-16 02:42:08,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-16 02:42:08,183 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-10-16 02:42:08,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:42:08,186 INFO L225 Difference]: With dead ends: 129 [2021-10-16 02:42:08,186 INFO L226 Difference]: Without dead ends: 105 [2021-10-16 02:42:08,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 292.7ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-16 02:42:08,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-16 02:42:08,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2021-10-16 02:42:08,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.2625) internal successors, (101), 80 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:08,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2021-10-16 02:42:08,210 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 37 [2021-10-16 02:42:08,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:42:08,211 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2021-10-16 02:42:08,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:08,211 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2021-10-16 02:42:08,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-16 02:42:08,214 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:42:08,214 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:42:08,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:08,465 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:08,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:08,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:42:08,828 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:42:08,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:42:08,829 INFO L82 PathProgramCache]: Analyzing trace with hash -986570111, now seen corresponding path program 1 times [2021-10-16 02:42:08,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:42:08,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [191311335] [2021-10-16 02:42:08,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:08,830 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:42:08,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:42:08,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:42:08,834 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-16 02:42:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:09,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:42:09,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:09,460 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:42:09,460 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:09,801 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:42:09,801 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:42:09,801 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [191311335] [2021-10-16 02:42:09,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [191311335] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:09,802 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2098486290] [2021-10-16 02:42:09,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:09,802 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:42:09,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:42:09,804 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:42:09,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-16 02:42:10,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:10,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:42:10,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:42:10,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:10,782 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-16 02:42:10,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2098486290] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:10,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727048683] [2021-10-16 02:42:10,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:42:10,783 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:42:10,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:42:10,786 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:42:10,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-16 02:42:11,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:42:11,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:42:11,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-16 02:42:11,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:12,248 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-16 02:42:12,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727048683] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:12,249 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:42:12,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 18 [2021-10-16 02:42:12,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881403600] [2021-10-16 02:42:12,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-16 02:42:12,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:42:12,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-16 02:42:12,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-16 02:42:12,253 INFO L87 Difference]: Start difference. First operand 81 states and 101 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:19,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:42:19,236 INFO L93 Difference]: Finished difference Result 510 states and 706 transitions. [2021-10-16 02:42:19,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-16 02:42:19,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-10-16 02:42:19,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:42:19,242 INFO L225 Difference]: With dead ends: 510 [2021-10-16 02:42:19,242 INFO L226 Difference]: Without dead ends: 436 [2021-10-16 02:42:19,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2705.8ms TimeCoverageRelationStatistics Valid=1007, Invalid=2653, Unknown=0, NotChecked=0, Total=3660 [2021-10-16 02:42:19,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-10-16 02:42:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2021-10-16 02:42:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.2005494505494505) internal successors, (437), 364 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2021-10-16 02:42:19,391 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 63 [2021-10-16 02:42:19,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:42:19,392 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2021-10-16 02:42:19,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2021-10-16 02:42:19,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-10-16 02:42:19,401 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:42:19,402 INFO L512 BasicCegarLoop]: trace histogram [72, 72, 12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:42:19,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:19,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:19,821 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:20,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:42:20,006 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:42:20,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:42:20,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2136079359, now seen corresponding path program 2 times [2021-10-16 02:42:20,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:42:20,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1253788578] [2021-10-16 02:42:20,011 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:42:20,011 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:42:20,012 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:42:20,022 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:42:20,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-16 02:42:21,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:42:21,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:42:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:42:21,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:22,205 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-16 02:42:22,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:23,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-16 02:42:23,432 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:42:23,432 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1253788578] [2021-10-16 02:42:23,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1253788578] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:23,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [304489331] [2021-10-16 02:42:23,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:42:23,433 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:42:23,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:42:23,439 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:42:23,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-16 02:42:25,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:42:25,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:42:25,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:42:25,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:26,131 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-16 02:42:26,131 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-16 02:42:26,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [304489331] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:26,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842016099] [2021-10-16 02:42:26,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:42:26,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:42:26,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:42:26,899 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:42:26,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-16 02:42:28,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:42:28,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:42:28,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:42:28,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 0 proven. 1853 refuted. 0 times theorem prover too weak. 5441 trivial. 0 not checked. [2021-10-16 02:42:30,444 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:31,595 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 0 proven. 1853 refuted. 0 times theorem prover too weak. 5441 trivial. 0 not checked. [2021-10-16 02:42:31,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842016099] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:31,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:42:31,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 5, 5] total 24 [2021-10-16 02:42:31,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397674114] [2021-10-16 02:42:31,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-16 02:42:31,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:42:31,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-16 02:42:31,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:42:31,600 INFO L87 Difference]: Start difference. First operand 365 states and 437 transitions. Second operand has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:45,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:42:45,776 INFO L93 Difference]: Finished difference Result 1502 states and 2144 transitions. [2021-10-16 02:42:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-16 02:42:45,777 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-10-16 02:42:45,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:42:45,785 INFO L225 Difference]: With dead ends: 1502 [2021-10-16 02:42:45,785 INFO L226 Difference]: Without dead ends: 1148 [2021-10-16 02:42:45,793 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1518 GetRequests, 1406 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 8297.1ms TimeCoverageRelationStatistics Valid=2944, Invalid=9938, Unknown=0, NotChecked=0, Total=12882 [2021-10-16 02:42:45,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-10-16 02:42:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1121. [2021-10-16 02:42:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 1.1330357142857144) internal successors, (1269), 1120 states have internal predecessors, (1269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1269 transitions. [2021-10-16 02:42:45,952 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1269 transitions. Word has length 239 [2021-10-16 02:42:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:42:45,952 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1269 transitions. [2021-10-16 02:42:45,953 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.1666666666666665) internal successors, (76), 24 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:42:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1269 transitions. [2021-10-16 02:42:46,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-10-16 02:42:46,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:42:46,010 INFO L512 BasicCegarLoop]: trace histogram [504, 168, 36, 36, 36, 12, 12, 12, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:42:46,026 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:46,251 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-16 02:42:46,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-16 02:42:46,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:42:46,619 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:42:46,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:42:46,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1126566913, now seen corresponding path program 3 times [2021-10-16 02:42:46,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:42:46,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2005508497] [2021-10-16 02:42:46,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:42:46,635 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:42:46,635 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:42:46,636 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:42:46,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-16 02:42:52,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-16 02:42:52,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:42:52,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:42:52,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:42:55,104 INFO L134 CoverageAnalysis]: Checked inductivity of 163328 backedges. 7922 proven. 105 refuted. 0 times theorem prover too weak. 155301 trivial. 0 not checked. [2021-10-16 02:42:55,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:42:58,855 INFO L134 CoverageAnalysis]: Checked inductivity of 163328 backedges. 7922 proven. 105 refuted. 0 times theorem prover too weak. 155301 trivial. 0 not checked. [2021-10-16 02:42:58,856 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:42:58,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2005508497] [2021-10-16 02:42:58,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2005508497] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:42:58,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1174868224] [2021-10-16 02:42:58,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:42:58,857 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:42:58,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:42:58,866 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:42:58,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-16 02:43:51,390 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() [2021-10-16 02:43:51,391 ERROR L418 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Exception during sending of exit command (exit): Broken pipe [2021-10-16 02:43:51,392 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 134 [2021-10-16 02:43:51,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-16 02:43:51,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:43:51,793 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_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheck.(InterpolatingTraceCheck.java:90) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:241) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parseCheckSatResult(Executor.java:260) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Scriptor.checkSat(Scriptor.java:155) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.checkSat(WrapperScript.java:163) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.annotateAndAssertOutsideLoopFirst2(AnnotateAndAsserterWithStmtOrderPrioritization.java:277) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.AnnotateAndAsserterWithStmtOrderPrioritization.buildAnnotatedSsaAndAssertTerms(AnnotateAndAsserterWithStmtOrderPrioritization.java:214) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.checkTrace(TraceCheck.java:312) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:211) ... 32 more Caused by: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: EOF at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser$Action$.CUP$do_action(Parser.java:1465) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Parser.do_action(Parser.java:658) at com.github.jhoenicke.javacup.runtime.LRParser.parse(LRParser.java:383) at de.uni_freiburg.informatik.ultimate.smtsolver.external.Executor.parse(Executor.java:237) ... 40 more [2021-10-16 02:43:51,798 INFO L168 Benchmark]: Toolchain (without parser) took 111956.56 ms. Allocated memory was 50.3 MB in the beginning and 96.5 MB in the end (delta: 46.1 MB). Free memory was 26.9 MB in the beginning and 37.4 MB in the end (delta: -10.5 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:51,799 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 50.3 MB. Free memory was 32.1 MB in the beginning and 32.0 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:51,799 INFO L168 Benchmark]: CACSL2BoogieTranslator took 486.39 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 26.7 MB in the beginning and 47.6 MB in the end (delta: -20.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:51,800 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.68 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 45.8 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:43:51,800 INFO L168 Benchmark]: Boogie Preprocessor took 58.83 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 44.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:51,804 INFO L168 Benchmark]: RCFGBuilder took 813.13 ms. Allocated memory is still 65.0 MB. Free memory was 44.2 MB in the beginning and 44.3 MB in the end (delta: -105.6 kB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:51,805 INFO L168 Benchmark]: TraceAbstraction took 110502.91 ms. Allocated memory was 65.0 MB in the beginning and 96.5 MB in the end (delta: 31.5 MB). Free memory was 43.8 MB in the beginning and 37.4 MB in the end (delta: 6.4 MB). Peak memory consumption was 39.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:43:51,808 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 50.3 MB. Free memory was 32.1 MB in the beginning and 32.0 MB in the end (delta: 38.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 486.39 ms. Allocated memory was 50.3 MB in the beginning and 65.0 MB in the end (delta: 14.7 MB). Free memory was 26.7 MB in the beginning and 47.6 MB in the end (delta: -20.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 80.68 ms. Allocated memory is still 65.0 MB. Free memory was 47.6 MB in the beginning and 45.8 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 58.83 ms. Allocated memory is still 65.0 MB. Free memory was 45.8 MB in the beginning and 44.3 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 813.13 ms. Allocated memory is still 65.0 MB. Free memory was 44.2 MB in the beginning and 44.3 MB in the end (delta: -105.6 kB). Peak memory consumption was 14.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 110502.91 ms. Allocated memory was 65.0 MB in the beginning and 96.5 MB in the end (delta: 31.5 MB). Free memory was 43.8 MB in the beginning and 37.4 MB in the end (delta: 6.4 MB). Peak memory consumption was 39.1 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_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (16) with exit command (exit)) Received EOF on stdin. stderr output: Fatal failure within void CVC4::TheoryEngine::check(CVC4::theory::Theory::Effort) at /barrett/scratch/noetzli/barrett-cluster/cvc4_build_scripts/dest_fixed/src/cvc4-2020-08-25/src/theory/theory_engine.cpp:545 Check failure d_curr_model->isBuiltSuccess() : de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheck.(TraceCheck.java:232) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:43:51,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_802c0926-6d04-4f95-b2c5-023035851882/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...