./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-multidimensional/add-3-n-u.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/add-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8 --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 c362da824550e9feb28e3c042ad1de3abc7c98f5 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/array-multidimensional/add-3-n-u.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8 --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 c362da824550e9feb28e3c042ad1de3abc7c98f5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 06:52:44,892 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:52:44,895 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:52:44,962 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:52:44,963 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:52:44,964 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:52:44,970 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:52:44,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:52:44,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:52:44,994 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:52:44,996 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:52:44,998 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:52:44,999 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:52:45,003 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:52:45,008 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:52:45,015 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:52:45,021 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:52:45,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:52:45,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:52:45,031 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:52:45,037 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:52:45,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:52:45,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:52:45,045 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:52:45,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:52:45,057 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:52:45,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:52:45,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:52:45,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:52:45,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:52:45,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:52:45,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:52:45,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:52:45,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:52:45,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:52:45,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:52:45,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:52:45,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:52:45,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:52:45,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:52:45,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:52:45,077 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 06:52:45,143 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:52:45,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:52:45,146 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:52:45,146 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:52:45,146 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:52:45,147 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:52:45,147 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 06:52:45,147 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:52:45,148 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:52:45,148 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 06:52:45,149 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 06:52:45,150 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:52:45,150 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 06:52:45,151 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 06:52:45,151 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 06:52:45,152 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:52:45,152 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:52:45,152 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 06:52:45,153 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:52:45,153 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:52:45,153 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:52:45,154 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:52:45,154 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:52:45,154 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:52:45,155 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:52:45,155 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:52:45,155 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:52:45,155 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:52:45,156 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:52:45,158 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:52:45,158 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:45,159 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:52:45,159 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:52:45,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:52:45,160 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 06:52:45,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 06:52:45,161 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:52:45,161 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:52:45,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:52:45,161 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_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c362da824550e9feb28e3c042ad1de3abc7c98f5 [2021-10-13 06:52:45,464 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:52:45,499 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:52:45,502 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:52:45,506 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:52:45,507 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:52:45,508 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-multidimensional/add-3-n-u.c [2021-10-13 06:52:45,608 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data/a5f5287d2/ee7f457e3eb143c3bf8c5dd3e5c9d5c1/FLAG5e246a472 [2021-10-13 06:52:46,128 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:52:46,129 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/sv-benchmarks/c/array-multidimensional/add-3-n-u.c [2021-10-13 06:52:46,136 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data/a5f5287d2/ee7f457e3eb143c3bf8c5dd3e5c9d5c1/FLAG5e246a472 [2021-10-13 06:52:46,505 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data/a5f5287d2/ee7f457e3eb143c3bf8c5dd3e5c9d5c1 [2021-10-13 06:52:46,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:52:46,509 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:52:46,515 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:46,515 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:52:46,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:52:46,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,521 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b2afaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46, skipping insertion in model container [2021-10-13 06:52:46,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,532 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:52:46,554 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:52:46,725 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_91bfae38-793a-4a6c-adb7-0fea5944577d/sv-benchmarks/c/array-multidimensional/add-3-n-u.c[321,334] [2021-10-13 06:52:46,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:46,758 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:52:46,772 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_91bfae38-793a-4a6c-adb7-0fea5944577d/sv-benchmarks/c/array-multidimensional/add-3-n-u.c[321,334] [2021-10-13 06:52:46,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:46,805 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:52:46,806 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46 WrapperNode [2021-10-13 06:52:46,806 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:46,807 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:46,807 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:52:46,808 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:52:46,816 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,859 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:46,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:52:46,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:52:46,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:52:46,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,897 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,902 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,904 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,906 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:52:46,907 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:52:46,907 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:52:46,907 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:52:46,908 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (1/1) ... [2021-10-13 06:52:46,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:46,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:46,939 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:52:46,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:52:46,996 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 06:52:46,996 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:52:46,998 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 06:52:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:52:46,999 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:52:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 06:52:46,999 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:52:47,582 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:52:47,583 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 06:52:47,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:47 BoogieIcfgContainer [2021-10-13 06:52:47,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:52:47,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:52:47,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:52:47,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:52:47,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:52:46" (1/3) ... [2021-10-13 06:52:47,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b530c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:47, skipping insertion in model container [2021-10-13 06:52:47,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:46" (2/3) ... [2021-10-13 06:52:47,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18b530c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:47, skipping insertion in model container [2021-10-13 06:52:47,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:47" (3/3) ... [2021-10-13 06:52:47,597 INFO L111 eAbstractionObserver]: Analyzing ICFG add-3-n-u.c [2021-10-13 06:52:47,604 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:52:47,604 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:52:47,658 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:52:47,666 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 [2021-10-13 06:52:47,667 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:52:47,684 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) [2021-10-13 06:52:47,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 06:52:47,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:47,691 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:47,692 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:47,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:47,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1242475547, now seen corresponding path program 1 times [2021-10-13 06:52:47,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:47,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588681404] [2021-10-13 06:52:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:47,714 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:47,810 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:52:47,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [857039778] [2021-10-13 06:52:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:47,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:47,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:47,819 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:47,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 06:52:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:52:47,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:48,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:48,084 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:48,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:48,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:48,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588681404] [2021-10-13 06:52:48,131 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:52:48,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857039778] [2021-10-13 06:52:48,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857039778] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:48,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:48,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 06:52:48,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889263294] [2021-10-13 06:52:48,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:52:48,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:52:48,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:52:48,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:52:48,174 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) [2021-10-13 06:52:48,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:48,295 INFO L93 Difference]: Finished difference Result 30 states and 49 transitions. [2021-10-13 06:52:48,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:52:48,299 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 [2021-10-13 06:52:48,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:48,310 INFO L225 Difference]: With dead ends: 30 [2021-10-13 06:52:48,310 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 06:52:48,314 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:52:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 06:52:48,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 06:52:48,366 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) [2021-10-13 06:52:48,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 28 transitions. [2021-10-13 06:52:48,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 28 transitions. Word has length 8 [2021-10-13 06:52:48,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:48,370 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 28 transitions. [2021-10-13 06:52:48,371 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) [2021-10-13 06:52:48,371 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 28 transitions. [2021-10-13 06:52:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 06:52:48,373 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:48,373 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:48,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:48,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 06:52:48,600 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:48,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:48,601 INFO L82 PathProgramCache]: Analyzing trace with hash 287923397, now seen corresponding path program 1 times [2021-10-13 06:52:48,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:48,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650487386] [2021-10-13 06:52:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:48,602 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:48,609 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:52:48,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2121589319] [2021-10-13 06:52:48,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:48,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:48,610 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:48,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:48,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 06:52:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:48,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:52:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:48,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:48,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:48,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 06:52:48,865 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:48,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650487386] [2021-10-13 06:52:48,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:52:48,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2121589319] [2021-10-13 06:52:48,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2121589319] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:48,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:48,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 06:52:48,868 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585707124] [2021-10-13 06:52:48,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:52:48,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:52:48,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:52:48,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:52:48,872 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) [2021-10-13 06:52:49,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:49,057 INFO L93 Difference]: Finished difference Result 50 states and 81 transitions. [2021-10-13 06:52:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:52:49,058 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 [2021-10-13 06:52:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:49,059 INFO L225 Difference]: With dead ends: 50 [2021-10-13 06:52:49,059 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 06:52:49,060 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:52:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 06:52:49,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2021-10-13 06:52:49,083 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) [2021-10-13 06:52:49,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 47 transitions. [2021-10-13 06:52:49,085 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 47 transitions. Word has length 12 [2021-10-13 06:52:49,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:49,085 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 47 transitions. [2021-10-13 06:52:49,085 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) [2021-10-13 06:52:49,086 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 47 transitions. [2021-10-13 06:52:49,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 06:52:49,090 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:49,090 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:49,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:49,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:49,303 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:49,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:49,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1283343331, now seen corresponding path program 1 times [2021-10-13 06:52:49,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:49,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132716866] [2021-10-13 06:52:49,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:49,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:49,330 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:52:49,331 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354719173] [2021-10-13 06:52:49,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:49,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:49,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:49,333 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:49,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 06:52:49,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:49,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:52:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:49,506 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 06:52:49,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:49,582 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-10-13 06:52:49,583 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:49,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132716866] [2021-10-13 06:52:49,583 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:52:49,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354719173] [2021-10-13 06:52:49,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354719173] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:49,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:49,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-13 06:52:49,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543798504] [2021-10-13 06:52:49,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:52:49,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 06:52:49,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:52:49,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:52:49,587 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) [2021-10-13 06:52:49,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:49,684 INFO L93 Difference]: Finished difference Result 84 states and 131 transitions. [2021-10-13 06:52:49,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:52:49,685 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 [2021-10-13 06:52:49,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:49,686 INFO L225 Difference]: With dead ends: 84 [2021-10-13 06:52:49,686 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 06:52:49,687 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 26.8ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:52:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 06:52:49,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 52. [2021-10-13 06:52:49,698 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) [2021-10-13 06:52:49,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 69 transitions. [2021-10-13 06:52:49,700 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 69 transitions. Word has length 20 [2021-10-13 06:52:49,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:49,700 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 69 transitions. [2021-10-13 06:52:49,701 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) [2021-10-13 06:52:49,701 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 69 transitions. [2021-10-13 06:52:49,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 06:52:49,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:49,702 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:49,749 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:49,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:49,931 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:49,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:49,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1093367837, now seen corresponding path program 1 times [2021-10-13 06:52:49,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 06:52:49,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632975892] [2021-10-13 06:52:49,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:49,933 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 06:52:49,947 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 06:52:49,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1084968810] [2021-10-13 06:52:49,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:49,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:49,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:49,950 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:52:49,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 06:52:50,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:50,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:52:50,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:50,219 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 06:52:50,219 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:50,338 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-10-13 06:52:50,338 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 06:52:50,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632975892] [2021-10-13 06:52:50,339 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 06:52:50,339 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084968810] [2021-10-13 06:52:50,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1084968810] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:52:50,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1760816147] [2021-10-13 06:52:50,365 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-13 06:52:50,366 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 06:52:50,371 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 06:52:50,377 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 06:52:50,378 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 06:52:50,432 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:50,440 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:52:50,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:50,442 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 39 [2021-10-13 06:52:50,448 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 06:52:50,449 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:50,451 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 118 [2021-10-13 06:52:50,461 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 263 [2021-10-13 06:52:50,517 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:50,524 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:50,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:50,541 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:50,543 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:50,553 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 06:52:50,839 INFO L354 Elim1Store]: treesize reduction 380, result has 6.4 percent of original size [2021-10-13 06:52:50,844 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 [2021-10-13 06:52:50,849 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:50,863 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-10-13 06:52:50,869 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:50,872 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 96 [2021-10-13 06:52:50,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 06:52:50,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 06:52:51,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:51,023 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 06:52:51,032 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 238 [2021-10-13 06:52:51,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 06:52:51,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:260, output treesize:238 [2021-10-13 06:52:51,081 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:51,259 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:52:51,259 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) [2021-10-13 06:52:51,263 INFO L168 Benchmark]: Toolchain (without parser) took 4753.78 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 89.5 MB in the beginning and 66.0 MB in the end (delta: 23.4 MB). Peak memory consumption was 48.0 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:51,264 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 119.5 MB. Free memory was 74.0 MB in the beginning and 73.9 MB in the end (delta: 60.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:52:51,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 291.44 ms. Allocated memory is still 119.5 MB. Free memory was 89.5 MB in the beginning and 93.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:51,265 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.12 ms. Allocated memory is still 119.5 MB. Free memory was 93.1 MB in the beginning and 91.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:51,266 INFO L168 Benchmark]: Boogie Preprocessor took 46.30 ms. Allocated memory is still 119.5 MB. Free memory was 91.3 MB in the beginning and 90.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:52:51,267 INFO L168 Benchmark]: RCFGBuilder took 679.58 ms. Allocated memory is still 119.5 MB. Free memory was 89.7 MB in the beginning and 74.1 MB in the end (delta: 15.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:51,269 INFO L168 Benchmark]: TraceAbstraction took 3673.45 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 73.5 MB in the beginning and 66.0 MB in the end (delta: 7.4 MB). Peak memory consumption was 34.9 MB. Max. memory is 16.1 GB. [2021-10-13 06:52:51,272 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 119.5 MB. Free memory was 74.0 MB in the beginning and 73.9 MB in the end (delta: 60.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 291.44 ms. Allocated memory is still 119.5 MB. Free memory was 89.5 MB in the beginning and 93.1 MB in the end (delta: -3.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.12 ms. Allocated memory is still 119.5 MB. Free memory was 93.1 MB in the beginning and 91.3 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 46.30 ms. Allocated memory is still 119.5 MB. Free memory was 91.3 MB in the beginning and 90.0 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 679.58 ms. Allocated memory is still 119.5 MB. Free memory was 89.7 MB in the beginning and 74.1 MB in the end (delta: 15.6 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3673.45 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 73.5 MB in the beginning and 66.0 MB in the end (delta: 7.4 MB). Peak memory consumption was 34.9 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. [2021-10-13 06:52:51,329 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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-4e77c04 [2021-10-13 06:52:54,011 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 06:52:54,013 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 06:52:54,060 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 06:52:54,061 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 06:52:54,065 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 06:52:54,067 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 06:52:54,072 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 06:52:54,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 06:52:54,083 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 06:52:54,085 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 06:52:54,087 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 06:52:54,087 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 06:52:54,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 06:52:54,092 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 06:52:54,099 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 06:52:54,101 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 06:52:54,102 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 06:52:54,104 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 06:52:54,114 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 06:52:54,116 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 06:52:54,117 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 06:52:54,120 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 06:52:54,122 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 06:52:54,131 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 06:52:54,132 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 06:52:54,132 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 06:52:54,134 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 06:52:54,135 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 06:52:54,136 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 06:52:54,137 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 06:52:54,138 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 06:52:54,140 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 06:52:54,141 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 06:52:54,142 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 06:52:54,143 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 06:52:54,143 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 06:52:54,144 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 06:52:54,144 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 06:52:54,146 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 06:52:54,147 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 06:52:54,152 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 06:52:54,197 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 06:52:54,198 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 06:52:54,199 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 06:52:54,199 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 06:52:54,200 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 06:52:54,200 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 06:52:54,200 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 06:52:54,200 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 06:52:54,200 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 06:52:54,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 06:52:54,203 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 06:52:54,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 06:52:54,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 06:52:54,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 06:52:54,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 06:52:54,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 06:52:54,204 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 06:52:54,204 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 06:52:54,205 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 06:52:54,205 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 06:52:54,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 06:52:54,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 06:52:54,206 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 06:52:54,206 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 06:52:54,206 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 06:52:54,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 06:52:54,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:54,207 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 06:52:54,207 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 06:52:54,207 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 06:52:54,207 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 06:52:54,208 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 06:52:54,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 06:52:54,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 06:52:54,209 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 06:52:54,209 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_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c362da824550e9feb28e3c042ad1de3abc7c98f5 [2021-10-13 06:52:54,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 06:52:54,679 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 06:52:54,681 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 06:52:54,684 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 06:52:54,685 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 06:52:54,686 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/array-multidimensional/add-3-n-u.c [2021-10-13 06:52:54,763 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data/59f5f221e/6e51e1978e444c8097e3396ec574d3d3/FLAGba11e495e [2021-10-13 06:52:55,382 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 06:52:55,387 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/sv-benchmarks/c/array-multidimensional/add-3-n-u.c [2021-10-13 06:52:55,395 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data/59f5f221e/6e51e1978e444c8097e3396ec574d3d3/FLAGba11e495e [2021-10-13 06:52:55,716 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/data/59f5f221e/6e51e1978e444c8097e3396ec574d3d3 [2021-10-13 06:52:55,721 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 06:52:55,723 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 06:52:55,726 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:55,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 06:52:55,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 06:52:55,731 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,734 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@246f1af6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:55, skipping insertion in model container [2021-10-13 06:52:55,734 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 06:52:55" (1/1) ... [2021-10-13 06:52:55,742 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 06:52:55,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 06:52:55,908 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_91bfae38-793a-4a6c-adb7-0fea5944577d/sv-benchmarks/c/array-multidimensional/add-3-n-u.c[321,334] [2021-10-13 06:52:55,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:55,981 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 06:52:56,007 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_91bfae38-793a-4a6c-adb7-0fea5944577d/sv-benchmarks/c/array-multidimensional/add-3-n-u.c[321,334] [2021-10-13 06:52:56,059 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 06:52:56,075 INFO L208 MainTranslator]: Completed translation [2021-10-13 06:52:56,076 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56 WrapperNode [2021-10-13 06:52:56,076 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 06:52:56,078 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:56,078 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 06:52:56,078 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 06:52:56,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,097 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,124 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 06:52:56,125 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 06:52:56,125 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 06:52:56,126 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 06:52:56,135 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,139 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,140 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,149 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 06:52:56,162 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 06:52:56,162 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 06:52:56,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 06:52:56,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (1/1) ... [2021-10-13 06:52:56,172 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 06:52:56,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:52:56,202 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 06:52:56,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 06:52:56,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 06:52:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 06:52:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 06:52:56,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 06:52:56,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 06:52:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 06:52:56,253 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 06:52:56,983 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 06:52:56,984 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 06:52:56,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:56 BoogieIcfgContainer [2021-10-13 06:52:56,986 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 06:52:56,988 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 06:52:56,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 06:52:56,991 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 06:52:56,991 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 06:52:55" (1/3) ... [2021-10-13 06:52:56,992 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3516cb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:56, skipping insertion in model container [2021-10-13 06:52:56,992 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 06:52:56" (2/3) ... [2021-10-13 06:52:57,006 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3516cb68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 06:52:57, skipping insertion in model container [2021-10-13 06:52:57,007 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 06:52:56" (3/3) ... [2021-10-13 06:52:57,008 INFO L111 eAbstractionObserver]: Analyzing ICFG add-3-n-u.c [2021-10-13 06:52:57,013 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 06:52:57,014 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 06:52:57,061 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 06:52:57,068 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 [2021-10-13 06:52:57,068 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 06:52:57,081 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) [2021-10-13 06:52:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:52:57,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:57,087 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:57,088 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:57,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:57,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1568356865, now seen corresponding path program 1 times [2021-10-13 06:52:57,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:57,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1025482205] [2021-10-13 06:52:57,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:57,113 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:57,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:57,127 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:57,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 06:52:57,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:57,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 06:52:57,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:57,385 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:57,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:57,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:57,427 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:57,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1025482205] [2021-10-13 06:52:57,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1025482205] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:57,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:57,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 06:52:57,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347164673] [2021-10-13 06:52:57,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 06:52:57,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:57,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 06:52:57,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 06:52:57,452 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) [2021-10-13 06:52:57,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:57,470 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2021-10-13 06:52:57,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 06:52:57,471 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 [2021-10-13 06:52:57,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:57,479 INFO L225 Difference]: With dead ends: 52 [2021-10-13 06:52:57,479 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 06:52:57,482 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 [2021-10-13 06:52:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 06:52:57,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 06:52:57,510 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) [2021-10-13 06:52:57,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 31 transitions. [2021-10-13 06:52:57,526 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 31 transitions. Word has length 11 [2021-10-13 06:52:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:57,527 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 31 transitions. [2021-10-13 06:52:57,527 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) [2021-10-13 06:52:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 31 transitions. [2021-10-13 06:52:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 06:52:57,528 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:57,528 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:57,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:57,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:52:57,741 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:57,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:57,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1115669473, now seen corresponding path program 1 times [2021-10-13 06:52:57,743 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:57,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [644084016] [2021-10-13 06:52:57,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:57,744 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:57,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:57,745 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:57,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 06:52:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:57,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:52:57,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:57,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:57,966 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:58,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 06:52:58,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:58,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [644084016] [2021-10-13 06:52:58,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [644084016] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:58,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:58,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 06:52:58,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855460092] [2021-10-13 06:52:58,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 06:52:58,015 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:58,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 06:52:58,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:52:58,016 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) [2021-10-13 06:52:58,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:58,258 INFO L93 Difference]: Finished difference Result 45 states and 62 transitions. [2021-10-13 06:52:58,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 06:52:58,265 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 [2021-10-13 06:52:58,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:58,266 INFO L225 Difference]: With dead ends: 45 [2021-10-13 06:52:58,266 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 06:52:58,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 06:52:58,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 06:52:58,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 06:52:58,275 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) [2021-10-13 06:52:58,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-13 06:52:58,276 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 11 [2021-10-13 06:52:58,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:58,277 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-13 06:52:58,277 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) [2021-10-13 06:52:58,277 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-13 06:52:58,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 06:52:58,278 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:58,279 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:58,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-10-13 06:52:58,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:52:58,492 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:58,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:58,493 INFO L82 PathProgramCache]: Analyzing trace with hash 742035169, now seen corresponding path program 1 times [2021-10-13 06:52:58,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:58,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1310796241] [2021-10-13 06:52:58,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:58,494 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:58,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:58,511 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:58,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 06:52:58,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:58,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:52:58,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 06:52:58,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:52:58,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 06:52:58,832 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:52:58,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1310796241] [2021-10-13 06:52:58,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1310796241] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:52:58,833 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:52:58,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:52:58,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30110905] [2021-10-13 06:52:58,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:52:58,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:52:58,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:52:58,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:52:58,836 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) [2021-10-13 06:52:59,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:52:59,293 INFO L93 Difference]: Finished difference Result 75 states and 106 transitions. [2021-10-13 06:52:59,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:52:59,293 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 [2021-10-13 06:52:59,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:52:59,295 INFO L225 Difference]: With dead ends: 75 [2021-10-13 06:52:59,295 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 06:52:59,296 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 44.5ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:52:59,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 06:52:59,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 47. [2021-10-13 06:52:59,307 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) [2021-10-13 06:52:59,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 62 transitions. [2021-10-13 06:52:59,309 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 62 transitions. Word has length 17 [2021-10-13 06:52:59,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:52:59,309 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 62 transitions. [2021-10-13 06:52:59,309 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) [2021-10-13 06:52:59,309 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 62 transitions. [2021-10-13 06:52:59,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 06:52:59,310 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:52:59,311 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:52:59,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 06:52:59,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:52:59,524 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:52:59,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:52:59,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1930294047, now seen corresponding path program 1 times [2021-10-13 06:52:59,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:52:59,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [99485070] [2021-10-13 06:52:59,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:52:59,526 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:52:59,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:52:59,527 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:52:59,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 06:52:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:52:59,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:52:59,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:52:59,884 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 06:52:59,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:00,054 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 06:53:00,055 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:53:00,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [99485070] [2021-10-13 06:53:00,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [99485070] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:53:00,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 06:53:00,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 06:53:00,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725669651] [2021-10-13 06:53:00,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:53:00,058 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:53:00,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:53:00,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 06:53:00,063 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) [2021-10-13 06:53:00,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:53:00,509 INFO L93 Difference]: Finished difference Result 114 states and 161 transitions. [2021-10-13 06:53:00,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:53:00,510 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 [2021-10-13 06:53:00,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:53:00,512 INFO L225 Difference]: With dead ends: 114 [2021-10-13 06:53:00,512 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 06:53:00,513 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 06:53:00,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 06:53:00,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 67. [2021-10-13 06:53:00,532 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) [2021-10-13 06:53:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 84 transitions. [2021-10-13 06:53:00,534 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 84 transitions. Word has length 29 [2021-10-13 06:53:00,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:53:00,535 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 84 transitions. [2021-10-13 06:53:00,535 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) [2021-10-13 06:53:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 84 transitions. [2021-10-13 06:53:00,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 06:53:00,537 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:00,537 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 06:53:00,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:00,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:53:00,751 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:00,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:00,752 INFO L82 PathProgramCache]: Analyzing trace with hash 863846625, now seen corresponding path program 1 times [2021-10-13 06:53:00,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:00,753 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196096922] [2021-10-13 06:53:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:00,753 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:00,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:00,754 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:00,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 06:53:00,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:00,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:53:00,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:01,198 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 06:53:01,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:01,437 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 06:53:01,438 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:53:01,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196096922] [2021-10-13 06:53:01,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196096922] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:01,439 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [602927715] [2021-10-13 06:53:01,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:01,439 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:01,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:53:01,444 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:53:01,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 06:53:01,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:01,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:53:01,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:01,834 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 06:53:01,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:01,968 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-10-13 06:53:01,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [602927715] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:01,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915188582] [2021-10-13 06:53:01,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:01,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:53:01,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:53:01,972 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:53:01,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 06:53:02,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:02,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 06:53:02,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:02,476 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 06:53:02,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:02,693 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-10-13 06:53:02,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915188582] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 06:53:02,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 06:53:02,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [6, 6, 6, 6] total 14 [2021-10-13 06:53:02,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12737737] [2021-10-13 06:53:02,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 06:53:02,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:53:02,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 06:53:02,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-13 06:53:02,697 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) [2021-10-13 06:53:03,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:53:03,151 INFO L93 Difference]: Finished difference Result 129 states and 163 transitions. [2021-10-13 06:53:03,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 06:53:03,152 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 [2021-10-13 06:53:03,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:53:03,155 INFO L225 Difference]: With dead ends: 129 [2021-10-13 06:53:03,156 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 06:53:03,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 06:53:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 06:53:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 81. [2021-10-13 06:53:03,176 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) [2021-10-13 06:53:03,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 101 transitions. [2021-10-13 06:53:03,177 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 101 transitions. Word has length 37 [2021-10-13 06:53:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:53:03,178 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 101 transitions. [2021-10-13 06:53:03,178 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) [2021-10-13 06:53:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 101 transitions. [2021-10-13 06:53:03,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 06:53:03,181 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:03,181 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] [2021-10-13 06:53:03,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:03,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:03,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 06:53:03,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 06:53:03,788 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:03,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:03,789 INFO L82 PathProgramCache]: Analyzing trace with hash -986570111, now seen corresponding path program 1 times [2021-10-13 06:53:03,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:03,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116195115] [2021-10-13 06:53:03,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:03,790 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:03,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:03,791 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:03,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 06:53:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:04,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:53:04,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 06:53:04,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:04,676 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 06:53:04,676 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:53:04,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116195115] [2021-10-13 06:53:04,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116195115] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:04,677 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [184180324] [2021-10-13 06:53:04,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:04,677 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:04,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:53:04,681 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:53:04,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 06:53:05,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:05,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:53:05,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:05,298 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 06:53:05,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:05,501 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 34 proven. 3 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-13 06:53:05,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [184180324] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:05,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470937758] [2021-10-13 06:53:05,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 06:53:05,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:53:05,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:53:05,507 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:53:05,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 06:53:05,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 06:53:06,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:53:06,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:06,401 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-13 06:53:06,401 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:06,747 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 51 proven. 13 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2021-10-13 06:53:06,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470937758] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:06,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:53:06,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 18 [2021-10-13 06:53:06,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508839296] [2021-10-13 06:53:06,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 06:53:06,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:53:06,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 06:53:06,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-10-13 06:53:06,751 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) [2021-10-13 06:53:13,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:53:13,212 INFO L93 Difference]: Finished difference Result 510 states and 706 transitions. [2021-10-13 06:53:13,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 06:53:13,213 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 [2021-10-13 06:53:13,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:53:13,225 INFO L225 Difference]: With dead ends: 510 [2021-10-13 06:53:13,225 INFO L226 Difference]: Without dead ends: 436 [2021-10-13 06:53:13,228 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 415 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 2389.5ms TimeCoverageRelationStatistics Valid=1007, Invalid=2653, Unknown=0, NotChecked=0, Total=3660 [2021-10-13 06:53:13,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2021-10-13 06:53:13,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 365. [2021-10-13 06:53:13,310 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) [2021-10-13 06:53:13,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 437 transitions. [2021-10-13 06:53:13,316 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 437 transitions. Word has length 63 [2021-10-13 06:53:13,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:53:13,317 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 437 transitions. [2021-10-13 06:53:13,317 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) [2021-10-13 06:53:13,317 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 437 transitions. [2021-10-13 06:53:13,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-10-13 06:53:13,336 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:13,336 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] [2021-10-13 06:53:13,403 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:13,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:13,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:13,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:13,951 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:13,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:13,952 INFO L82 PathProgramCache]: Analyzing trace with hash -2136079359, now seen corresponding path program 2 times [2021-10-13 06:53:13,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:13,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1532390919] [2021-10-13 06:53:13,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:53:13,955 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:13,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:13,959 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:14,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 06:53:15,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:53:15,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:53:15,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:53:15,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:15,885 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-13 06:53:15,886 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-13 06:53:16,872 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:53:16,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1532390919] [2021-10-13 06:53:16,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1532390919] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:16,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1430218925] [2021-10-13 06:53:16,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:53:16,873 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:16,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:53:16,874 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:53:16,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 06:53:18,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:53:18,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:53:18,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 06:53:18,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-13 06:53:19,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:19,744 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 554 proven. 21 refuted. 0 times theorem prover too weak. 6719 trivial. 0 not checked. [2021-10-13 06:53:19,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1430218925] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:19,745 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465839051] [2021-10-13 06:53:19,745 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 06:53:19,746 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 06:53:19,746 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 06:53:19,747 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 06:53:19,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 06:53:21,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 06:53:21,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:53:21,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 610 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 06:53:21,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:22,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 0 proven. 1853 refuted. 0 times theorem prover too weak. 5441 trivial. 0 not checked. [2021-10-13 06:53:22,624 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:23,624 INFO L134 CoverageAnalysis]: Checked inductivity of 7294 backedges. 0 proven. 1853 refuted. 0 times theorem prover too weak. 5441 trivial. 0 not checked. [2021-10-13 06:53:23,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465839051] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:23,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 06:53:23,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10, 5, 5] total 24 [2021-10-13 06:53:23,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013216465] [2021-10-13 06:53:23,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 06:53:23,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 06:53:23,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 06:53:23,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=434, Unknown=0, NotChecked=0, Total=552 [2021-10-13 06:53:23,628 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) [2021-10-13 06:53:36,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 06:53:36,007 INFO L93 Difference]: Finished difference Result 1502 states and 2144 transitions. [2021-10-13 06:53:36,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-13 06:53:36,008 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 [2021-10-13 06:53:36,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 06:53:36,016 INFO L225 Difference]: With dead ends: 1502 [2021-10-13 06:53:36,016 INFO L226 Difference]: Without dead ends: 1148 [2021-10-13 06:53:36,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1518 GetRequests, 1406 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4214 ImplicationChecksByTransitivity, 7131.5ms TimeCoverageRelationStatistics Valid=2944, Invalid=9938, Unknown=0, NotChecked=0, Total=12882 [2021-10-13 06:53:36,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-10-13 06:53:36,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 1121. [2021-10-13 06:53:36,144 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) [2021-10-13 06:53:36,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1269 transitions. [2021-10-13 06:53:36,148 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1269 transitions. Word has length 239 [2021-10-13 06:53:36,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 06:53:36,149 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 1269 transitions. [2021-10-13 06:53:36,149 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) [2021-10-13 06:53:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1269 transitions. [2021-10-13 06:53:36,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2021-10-13 06:53:36,183 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 06:53:36,184 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] [2021-10-13 06:53:36,275 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:36,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 06:53:36,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Ended with exit code 0 [2021-10-13 06:53:36,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:36,808 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 06:53:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 06:53:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1126566913, now seen corresponding path program 3 times [2021-10-13 06:53:36,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 06:53:36,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905180970] [2021-10-13 06:53:36,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:53:36,812 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 06:53:36,812 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 06:53:36,813 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 06:53:36,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 06:53:42,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-13 06:53:42,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 06:53:42,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 06:53:42,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 06:53:44,760 INFO L134 CoverageAnalysis]: Checked inductivity of 163328 backedges. 7922 proven. 105 refuted. 0 times theorem prover too weak. 155301 trivial. 0 not checked. [2021-10-13 06:53:44,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 06:53:48,296 INFO L134 CoverageAnalysis]: Checked inductivity of 163328 backedges. 7922 proven. 105 refuted. 0 times theorem prover too weak. 155301 trivial. 0 not checked. [2021-10-13 06:53:48,296 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 06:53:48,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905180970] [2021-10-13 06:53:48,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905180970] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 06:53:48,297 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [632510934] [2021-10-13 06:53:48,297 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 06:53:48,298 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 06:53:48,298 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 06:53:48,304 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 06:53:48,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 06:54:37,861 WARN L228 Executor]: External (MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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() [2021-10-13 06:54:37,881 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 134 [2021-10-13 06:54:37,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 06:54:38,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 06:54:38,067 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_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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 [2021-10-13 06:54:38,072 INFO L168 Benchmark]: Toolchain (without parser) took 102348.38 ms. Allocated memory was 54.5 MB in the beginning and 83.9 MB in the end (delta: 29.4 MB). Free memory was 31.1 MB in the beginning and 31.1 MB in the end (delta: 28.6 kB). Peak memory consumption was 30.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:54:38,072 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 54.5 MB. Free memory was 35.7 MB in the beginning and 35.7 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:54:38,073 INFO L168 Benchmark]: CACSL2BoogieTranslator took 350.67 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.9 MB in the beginning and 49.4 MB in the end (delta: -18.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 06:54:38,073 INFO L168 Benchmark]: Boogie Procedure Inliner took 46.74 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 47.4 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 06:54:38,074 INFO L168 Benchmark]: Boogie Preprocessor took 35.66 ms. Allocated memory is still 67.1 MB. Free memory was 47.4 MB in the beginning and 46.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:54:38,074 INFO L168 Benchmark]: RCFGBuilder took 824.43 ms. Allocated memory is still 67.1 MB. Free memory was 46.0 MB in the beginning and 33.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 06:54:38,074 INFO L168 Benchmark]: TraceAbstraction took 101082.62 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 32.7 MB in the beginning and 31.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 22.1 MB. Max. memory is 16.1 GB. [2021-10-13 06:54:38,077 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 54.5 MB. Free memory was 35.7 MB in the beginning and 35.7 MB in the end (delta: 38.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 350.67 ms. Allocated memory was 54.5 MB in the beginning and 67.1 MB in the end (delta: 12.6 MB). Free memory was 30.9 MB in the beginning and 49.4 MB in the end (delta: -18.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 46.74 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 47.4 MB in the end (delta: 1.9 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 35.66 ms. Allocated memory is still 67.1 MB. Free memory was 47.4 MB in the beginning and 46.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 824.43 ms. Allocated memory is still 67.1 MB. Free memory was 46.0 MB in the beginning and 33.3 MB in the end (delta: 12.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 101082.62 ms. Allocated memory was 67.1 MB in the beginning and 83.9 MB in the end (delta: 16.8 MB). Free memory was 32.7 MB in the beginning and 31.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 22.1 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_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/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. [2021-10-13 06:54:38,122 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_91bfae38-793a-4a6c-adb7-0fea5944577d/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...