./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops/sum03-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum03-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02c9c5d0d7fccf07466527195598f336cd5622e5 ........................................................................................................................................................................................................................................................................................................................................................ 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_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/loops/sum03-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 02c9c5d0d7fccf07466527195598f336cd5622e5 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:30:54,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:30:54,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:30:54,137 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:30:54,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:30:54,139 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:30:54,141 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:30:54,144 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:30:54,146 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:30:54,147 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:30:54,149 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:30:54,150 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:30:54,151 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:30:54,152 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:30:54,154 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:30:54,156 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:30:54,157 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:30:54,158 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:30:54,161 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:30:54,164 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:30:54,166 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:30:54,168 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:30:54,169 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:30:54,170 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:30:54,174 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:30:54,175 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:30:54,175 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:30:54,176 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:30:54,177 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:30:54,179 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:30:54,179 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:30:54,180 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:30:54,182 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:30:54,183 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:30:54,184 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:30:54,185 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:30:54,186 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:30:54,187 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:30:54,187 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:30:54,188 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:30:54,189 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:30:54,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:30:54,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:30:54,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:30:54,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:30:54,217 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:30:54,218 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:30:54,218 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:30:54,218 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:30:54,218 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:30:54,219 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:30:54,219 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:30:54,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:30:54,219 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:30:54,220 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:30:54,220 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:30:54,220 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:30:54,221 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:30:54,221 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:30:54,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:30:54,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:30:54,222 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:30:54,222 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:30:54,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:30:54,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:30:54,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:30:54,223 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:30:54,223 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:30:54,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:30:54,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:30:54,224 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:30:54,224 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:30:54,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:30:54,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:30:54,225 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:30:54,225 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:30:54,225 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:30:54,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:30:54,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:30:54,226 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:30:54,226 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:30:54,226 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_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c9c5d0d7fccf07466527195598f336cd5622e5 [2021-10-16 02:30:54,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:30:54,510 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:30:54,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:30:54,514 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:30:54,515 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:30:54,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loops/sum03-1.i [2021-10-16 02:30:54,597 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data/699816bc2/5f86a13ffcc94143808743fb8c3a6e79/FLAG6e3a698d8 [2021-10-16 02:30:55,111 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:30:55,111 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/sv-benchmarks/c/loops/sum03-1.i [2021-10-16 02:30:55,118 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data/699816bc2/5f86a13ffcc94143808743fb8c3a6e79/FLAG6e3a698d8 [2021-10-16 02:30:55,546 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data/699816bc2/5f86a13ffcc94143808743fb8c3a6e79 [2021-10-16 02:30:55,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:30:55,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:30:55,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:30:55,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:30:55,561 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:30:55,563 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,571 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e458fc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55, skipping insertion in model container [2021-10-16 02:30:55,572 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,579 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:30:55,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:30:55,753 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_a2de2766-376d-4abd-bb61-78435b09a56e/sv-benchmarks/c/loops/sum03-1.i[807,820] [2021-10-16 02:30:55,763 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:30:55,770 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:30:55,782 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_a2de2766-376d-4abd-bb61-78435b09a56e/sv-benchmarks/c/loops/sum03-1.i[807,820] [2021-10-16 02:30:55,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:30:55,798 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:30:55,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55 WrapperNode [2021-10-16 02:30:55,798 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:30:55,799 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:30:55,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:30:55,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:30:55,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,832 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:30:55,833 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:30:55,834 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:30:55,834 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:30:55,842 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,842 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,844 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,844 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,851 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,858 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,866 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:30:55,867 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:30:55,868 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:30:55,868 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:30:55,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (1/1) ... [2021-10-16 02:30:55,887 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:30:55,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:30:55,920 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:30:55,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:30:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:30:55,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:30:55,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:30:55,970 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:30:56,221 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:30:56,221 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:30:56,224 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:30:56 BoogieIcfgContainer [2021-10-16 02:30:56,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:30:56,227 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:30:56,228 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:30:56,232 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:30:56,232 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:30:55" (1/3) ... [2021-10-16 02:30:56,233 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dea0bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:30:56, skipping insertion in model container [2021-10-16 02:30:56,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:30:55" (2/3) ... [2021-10-16 02:30:56,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dea0bc1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:30:56, skipping insertion in model container [2021-10-16 02:30:56,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:30:56" (3/3) ... [2021-10-16 02:30:56,236 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2021-10-16 02:30:56,243 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:30:56,244 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:30:56,306 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:30:56,318 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:30:56,318 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:30:56,333 INFO L276 IsEmpty]: Start isEmpty. Operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:56,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-16 02:30:56,339 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:56,340 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-16 02:30:56,341 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:30:56,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:56,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1973607, now seen corresponding path program 1 times [2021-10-16 02:30:56,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:56,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565820641] [2021-10-16 02:30:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:56,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:56,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:56,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:56,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565820641] [2021-10-16 02:30:56,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565820641] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-16 02:30:56,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:30:56,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-16 02:30:56,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821219857] [2021-10-16 02:30:56,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:30:56,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:30:56,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:30:56,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:30:56,670 INFO L87 Difference]: Start difference. First operand has 6 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 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 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:56,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:30:56,711 INFO L93 Difference]: Finished difference Result 12 states and 17 transitions. [2021-10-16 02:30:56,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:30:56,714 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2021-10-16 02:30:56,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:30:56,723 INFO L225 Difference]: With dead ends: 12 [2021-10-16 02:30:56,723 INFO L226 Difference]: Without dead ends: 7 [2021-10-16 02:30:56,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:30:56,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-16 02:30:56,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-16 02:30:56,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:56,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-16 02:30:56,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 4 [2021-10-16 02:30:56,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:30:56,766 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-16 02:30:56,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:30:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-16 02:30:56,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:30:56,768 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:30:56,768 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2021-10-16 02:30:56,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-16 02:30:56,769 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:30:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:30:56,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1896800371, now seen corresponding path program 1 times [2021-10-16 02:30:56,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:30:56,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397714351] [2021-10-16 02:30:56,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:56,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:30:56,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:57,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:57,104 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:30:57,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397714351] [2021-10-16 02:30:57,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397714351] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-16 02:30:57,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996036481] [2021-10-16 02:30:57,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:30:57,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:30:57,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:30:57,108 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:30:57,129 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:30:57,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:30:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-16 02:30:57,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:30:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:30:57,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:04,041 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:04,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996036481] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:04,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [81321832] [2021-10-16 02:31:04,062 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2021-10-16 02:31:04,062 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:31:04,067 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:31:04,073 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:31:04,074 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:31:04,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:31:04,112 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:31:04,113 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:31:04,114 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-10-16 02:31:04,115 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:31:04,116 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:31:04,117 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-10-16 02:31:04,120 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 95 [2021-10-16 02:31:04,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:04,152 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:31:04,190 INFO L354 Elim1Store]: treesize reduction 23, result has 17.9 percent of original size [2021-10-16 02:31:04,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 26 [2021-10-16 02:31:04,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:31:04,196 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:31:04,202 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:31:04,203 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 20 [2021-10-16 02:31:04,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:31:04,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:31:04,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:31:04,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:31:04,253 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 80 [2021-10-16 02:31:04,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:31:04,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:92, output treesize:80 [2021-10-16 02:31:04,304 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:04,462 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:31:04,463 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_8| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:31:04,468 INFO L168 Benchmark]: Toolchain (without parser) took 8917.37 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 83.7 MB in the beginning and 100.8 MB in the end (delta: -17.1 MB). Peak memory consumption was 8.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:04,468 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 119.5 MB. Free memory was 92.7 MB in the beginning and 92.7 MB in the end (delta: 30.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:31:04,469 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.46 ms. Allocated memory is still 119.5 MB. Free memory was 83.5 MB in the beginning and 94.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:04,470 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.31 ms. Allocated memory is still 119.5 MB. Free memory was 94.5 MB in the beginning and 92.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:04,471 INFO L168 Benchmark]: Boogie Preprocessor took 33.30 ms. Allocated memory is still 119.5 MB. Free memory was 92.7 MB in the beginning and 91.8 MB in the end (delta: 950.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:04,472 INFO L168 Benchmark]: RCFGBuilder took 357.46 ms. Allocated memory is still 119.5 MB. Free memory was 91.8 MB in the beginning and 81.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:04,473 INFO L168 Benchmark]: TraceAbstraction took 8239.08 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 80.7 MB in the beginning and 100.8 MB in the end (delta: -20.0 MB). Peak memory consumption was 7.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:04,488 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 119.5 MB. Free memory was 92.7 MB in the beginning and 92.7 MB in the end (delta: 30.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 244.46 ms. Allocated memory is still 119.5 MB. Free memory was 83.5 MB in the beginning and 94.5 MB in the end (delta: -11.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.31 ms. Allocated memory is still 119.5 MB. Free memory was 94.5 MB in the beginning and 92.7 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.30 ms. Allocated memory is still 119.5 MB. Free memory was 92.7 MB in the beginning and 91.8 MB in the end (delta: 950.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 357.46 ms. Allocated memory is still 119.5 MB. Free memory was 91.8 MB in the beginning and 81.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8239.08 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 80.7 MB in the beginning and 100.8 MB in the end (delta: -20.0 MB). Peak memory consumption was 7.0 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_8| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_8|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:31:04,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:31:07,196 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:31:07,198 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:31:07,235 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:31:07,235 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:31:07,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:31:07,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:31:07,241 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:31:07,244 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:31:07,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:31:07,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:31:07,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:31:07,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:31:07,250 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:31:07,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:31:07,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:31:07,255 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:31:07,256 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:31:07,258 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:31:07,261 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:31:07,263 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:31:07,264 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:31:07,266 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:31:07,267 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:31:07,271 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:31:07,271 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:31:07,272 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:31:07,273 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:31:07,274 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:31:07,275 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:31:07,276 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:31:07,277 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:31:07,278 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:31:07,279 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:31:07,296 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:31:07,296 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:31:07,297 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:31:07,298 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:31:07,298 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:31:07,300 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:31:07,300 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:31:07,301 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:31:07,328 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:31:07,329 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:31:07,329 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:31:07,330 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:31:07,330 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:31:07,330 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:31:07,331 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:31:07,331 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:31:07,331 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:31:07,332 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:31:07,332 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:31:07,333 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:31:07,333 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:31:07,333 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:31:07,333 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:31:07,334 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:31:07,334 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:31:07,334 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:31:07,334 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:31:07,335 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:31:07,335 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:31:07,335 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:31:07,335 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:31:07,336 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:31:07,336 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:31:07,336 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:31:07,336 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:31:07,337 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:31:07,337 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:31:07,337 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:31:07,337 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:31:07,338 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:31:07,338 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:31:07,338 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:31:07,338 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:31:07,339 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_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 02c9c5d0d7fccf07466527195598f336cd5622e5 [2021-10-16 02:31:07,693 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:31:07,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:31:07,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:31:07,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:31:07,727 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:31:07,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/loops/sum03-1.i [2021-10-16 02:31:07,800 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data/a4661dfc9/29382968db50420fa6b1cc83ac379d64/FLAGc021686c1 [2021-10-16 02:31:08,275 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:31:08,275 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/sv-benchmarks/c/loops/sum03-1.i [2021-10-16 02:31:08,281 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data/a4661dfc9/29382968db50420fa6b1cc83ac379d64/FLAGc021686c1 [2021-10-16 02:31:08,645 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/data/a4661dfc9/29382968db50420fa6b1cc83ac379d64 [2021-10-16 02:31:08,647 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:31:08,649 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:31:08,650 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:31:08,651 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:31:08,654 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:31:08,655 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,656 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c1bbb7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08, skipping insertion in model container [2021-10-16 02:31:08,656 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,664 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:31:08,678 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:31:08,821 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_a2de2766-376d-4abd-bb61-78435b09a56e/sv-benchmarks/c/loops/sum03-1.i[807,820] [2021-10-16 02:31:08,832 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:31:08,844 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:31:08,857 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_a2de2766-376d-4abd-bb61-78435b09a56e/sv-benchmarks/c/loops/sum03-1.i[807,820] [2021-10-16 02:31:08,861 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:31:08,882 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:31:08,883 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08 WrapperNode [2021-10-16 02:31:08,883 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:31:08,884 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:31:08,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:31:08,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:31:08,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,929 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:31:08,955 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:31:08,955 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:31:08,956 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:31:08,964 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,982 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,985 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:08,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:09,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:31:09,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:31:09,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:31:09,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:31:09,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (1/1) ... [2021-10-16 02:31:09,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:31:09,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:31:09,044 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:31:09,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:31:09,106 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:31:09,107 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:31:09,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:31:09,107 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:31:09,417 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:31:09,417 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-16 02:31:09,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:31:09 BoogieIcfgContainer [2021-10-16 02:31:09,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:31:09,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:31:09,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:31:09,426 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:31:09,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:31:08" (1/3) ... [2021-10-16 02:31:09,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e270970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:31:09, skipping insertion in model container [2021-10-16 02:31:09,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:31:08" (2/3) ... [2021-10-16 02:31:09,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e270970 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:31:09, skipping insertion in model container [2021-10-16 02:31:09,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:31:09" (3/3) ... [2021-10-16 02:31:09,430 INFO L111 eAbstractionObserver]: Analyzing ICFG sum03-1.i [2021-10-16 02:31:09,437 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:31:09,438 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-16 02:31:09,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:31:09,521 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:31:09,522 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-16 02:31:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:09,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:31:09,563 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:09,564 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:31:09,565 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:31:09,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:09,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1810721996, now seen corresponding path program 1 times [2021-10-16 02:31:09,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:09,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1564730717] [2021-10-16 02:31:09,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:09,591 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:09,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:09,595 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:09,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:31:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:09,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-16 02:31:09,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:09,831 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:09,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:09,904 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:09,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1564730717] [2021-10-16 02:31:09,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1564730717] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:31:09,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:31:09,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:31:09,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910074333] [2021-10-16 02:31:09,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:31:09,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:09,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:31:09,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:31:09,937 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:09,984 INFO L93 Difference]: Finished difference Result 26 states and 40 transitions. [2021-10-16 02:31:09,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:31:09,986 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-10-16 02:31:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:09,994 INFO L225 Difference]: With dead ends: 26 [2021-10-16 02:31:09,995 INFO L226 Difference]: Without dead ends: 17 [2021-10-16 02:31:09,998 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:31:10,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-16 02:31:10,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 14. [2021-10-16 02:31:10,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:10,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-10-16 02:31:10,031 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 7 [2021-10-16 02:31:10,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:10,032 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-10-16 02:31:10,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:10,032 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-10-16 02:31:10,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:31:10,033 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:10,033 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:31:10,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:10,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:10,242 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:31:10,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:10,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1810662414, now seen corresponding path program 1 times [2021-10-16 02:31:10,243 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:10,243 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853355297] [2021-10-16 02:31:10,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:10,244 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:10,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:10,247 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:10,248 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:31:10,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:10,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:31:10,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:10,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:10,461 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:10,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:10,690 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:10,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853355297] [2021-10-16 02:31:10,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853355297] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:31:10,691 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:31:10,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 8 [2021-10-16 02:31:10,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742406180] [2021-10-16 02:31:10,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-16 02:31:10,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:10,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-16 02:31:10,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-10-16 02:31:10,697 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:10,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:10,831 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-16 02:31:10,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:31:10,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 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 7 [2021-10-16 02:31:10,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:10,833 INFO L225 Difference]: With dead ends: 21 [2021-10-16 02:31:10,833 INFO L226 Difference]: Without dead ends: 19 [2021-10-16 02:31:10,834 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:31:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-16 02:31:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 16. [2021-10-16 02:31:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-10-16 02:31:10,840 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 7 [2021-10-16 02:31:10,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:10,840 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-10-16 02:31:10,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-10-16 02:31:10,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:31:10,842 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:10,846 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1] [2021-10-16 02:31:10,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:11,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:11,058 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:31:11,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:11,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1969109706, now seen corresponding path program 1 times [2021-10-16 02:31:11,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:11,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2076916360] [2021-10-16 02:31:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:11,069 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:11,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:11,074 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:11,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:31:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:31:11,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:11,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:11,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:11,387 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:11,387 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:11,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2076916360] [2021-10-16 02:31:11,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2076916360] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:11,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2111471166] [2021-10-16 02:31:11,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:11,389 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:31:11,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:31:11,398 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:31:11,406 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-16 02:31:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:11,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:31:11,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:11,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:11,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:11,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2111471166] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:11,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010641956] [2021-10-16 02:31:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:11,657 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:31:11,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:31:11,659 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:31:11,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-16 02:31:11,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:11,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-16 02:31:11,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:11,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:12,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010641956] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:12,079 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:31:12,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 6] total 10 [2021-10-16 02:31:12,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326039498] [2021-10-16 02:31:12,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-16 02:31:12,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:12,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-16 02:31:12,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-10-16 02:31:12,089 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:12,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:12,301 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2021-10-16 02:31:12,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-16 02:31:12,302 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 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 15 [2021-10-16 02:31:12,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:12,304 INFO L225 Difference]: With dead ends: 48 [2021-10-16 02:31:12,304 INFO L226 Difference]: Without dead ends: 42 [2021-10-16 02:31:12,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:31:12,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-16 02:31:12,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2021-10-16 02:31:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 33 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:12,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2021-10-16 02:31:12,322 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 15 [2021-10-16 02:31:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:12,324 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2021-10-16 02:31:12,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2021-10-16 02:31:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-16 02:31:12,326 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:12,326 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1] [2021-10-16 02:31:12,355 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:12,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-16 02:31:12,777 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-16 02:31:12,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:31:12,949 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:31:12,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:12,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1969169288, now seen corresponding path program 1 times [2021-10-16 02:31:12,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:12,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1536113991] [2021-10-16 02:31:12,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:12,951 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:12,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:12,955 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:12,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-16 02:31:13,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:13,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:31:13,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:13,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:13,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:13,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1536113991] [2021-10-16 02:31:13,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1536113991] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:13,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1537220541] [2021-10-16 02:31:13,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:13,600 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:31:13,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:31:13,601 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:31:13,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-16 02:31:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:13,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-16 02:31:13,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:13,869 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:14,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1537220541] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:14,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492849853] [2021-10-16 02:31:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:31:14,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:31:14,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:31:14,027 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:31:14,054 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-16 02:31:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:31:14,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:31:14,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:14,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:14,333 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:14,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492849853] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:14,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:31:14,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 10] total 23 [2021-10-16 02:31:14,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894835459] [2021-10-16 02:31:14,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-16 02:31:14,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:14,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-16 02:31:14,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-10-16 02:31:14,828 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:16,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:16,219 INFO L93 Difference]: Finished difference Result 71 states and 85 transitions. [2021-10-16 02:31:16,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-16 02:31:16,220 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 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 15 [2021-10-16 02:31:16,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:16,222 INFO L225 Difference]: With dead ends: 71 [2021-10-16 02:31:16,223 INFO L226 Difference]: Without dead ends: 69 [2021-10-16 02:31:16,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1631.3ms TimeCoverageRelationStatistics Valid=319, Invalid=1241, Unknown=0, NotChecked=0, Total=1560 [2021-10-16 02:31:16,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-16 02:31:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 60. [2021-10-16 02:31:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.2033898305084745) internal successors, (71), 59 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2021-10-16 02:31:16,247 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 15 [2021-10-16 02:31:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:16,249 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2021-10-16 02:31:16,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2021-10-16 02:31:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-16 02:31:16,253 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:16,253 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1] [2021-10-16 02:31:16,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:16,473 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:16,668 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-10-16 02:31:16,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:31:16,868 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:31:16,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1590798326, now seen corresponding path program 2 times [2021-10-16 02:31:16,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:16,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [592805935] [2021-10-16 02:31:16,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:31:16,870 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:16,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:16,871 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:16,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-16 02:31:17,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:31:17,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:31:17,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:31:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:17,181 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:17,182 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:17,435 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:17,435 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:31:17,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [592805935] [2021-10-16 02:31:17,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [592805935] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:17,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1671666343] [2021-10-16 02:31:17,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:31:17,436 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:31:17,436 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:31:17,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:31:17,470 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-16 02:31:17,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:31:17,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:31:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-16 02:31:17,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:17,828 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:17,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:17,949 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:17,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1671666343] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:17,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121161221] [2021-10-16 02:31:17,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:31:17,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:31:17,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:31:17,954 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:31:17,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-16 02:31:18,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:31:18,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:31:18,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:31:18,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:31:18,252 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:18,252 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:31:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:31:18,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121161221] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:31:18,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:31:18,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 10] total 22 [2021-10-16 02:31:18,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276592593] [2021-10-16 02:31:18,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-16 02:31:18,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:31:18,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-16 02:31:18,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=318, Unknown=0, NotChecked=0, Total=462 [2021-10-16 02:31:18,672 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:19,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:31:19,473 INFO L93 Difference]: Finished difference Result 168 states and 203 transitions. [2021-10-16 02:31:19,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-16 02:31:19,474 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 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 31 [2021-10-16 02:31:19,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:31:19,476 INFO L225 Difference]: With dead ends: 168 [2021-10-16 02:31:19,477 INFO L226 Difference]: Without dead ends: 136 [2021-10-16 02:31:19,478 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 952.3ms TimeCoverageRelationStatistics Valid=326, Invalid=730, Unknown=0, NotChecked=0, Total=1056 [2021-10-16 02:31:19,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-16 02:31:19,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 124. [2021-10-16 02:31:19,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.1382113821138211) internal successors, (140), 123 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 140 transitions. [2021-10-16 02:31:19,496 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 140 transitions. Word has length 31 [2021-10-16 02:31:19,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:31:19,496 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 140 transitions. [2021-10-16 02:31:19,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.6818181818181817) internal successors, (81), 22 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:31:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 140 transitions. [2021-10-16 02:31:19,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-16 02:31:19,499 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:31:19,499 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1] [2021-10-16 02:31:19,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:19,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:19,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:20,111 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:31:20,111 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:31:20,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:31:20,112 INFO L82 PathProgramCache]: Analyzing trace with hash -855457058, now seen corresponding path program 3 times [2021-10-16 02:31:20,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:31:20,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [561495699] [2021-10-16 02:31:20,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:31:20,113 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:31:20,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:31:20,114 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:31:20,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-16 02:31:20,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-10-16 02:31:20,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-16 02:31:20,354 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-16 02:31:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-16 02:31:20,451 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-16 02:31:20,451 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-16 02:31:20,453 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:31:20,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-16 02:31:20,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:31:20,672 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:31:20,719 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:31:20 BoogieIcfgContainer [2021-10-16 02:31:20,719 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:31:20,720 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:31:20,720 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:31:20,720 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:31:20,721 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:31:09" (3/4) ... [2021-10-16 02:31:20,723 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-16 02:31:20,808 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:31:20,808 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:31:20,809 INFO L168 Benchmark]: Toolchain (without parser) took 12159.60 ms. Allocated memory was 71.3 MB in the beginning and 104.9 MB in the end (delta: 33.6 MB). Free memory was 53.2 MB in the beginning and 72.6 MB in the end (delta: -19.4 MB). Peak memory consumption was 13.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:20,810 INFO L168 Benchmark]: CDTParser took 0.30 ms. Allocated memory is still 71.3 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:31:20,811 INFO L168 Benchmark]: CACSL2BoogieTranslator took 232.77 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 55.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:20,811 INFO L168 Benchmark]: Boogie Procedure Inliner took 70.58 ms. Allocated memory is still 71.3 MB. Free memory was 55.3 MB in the beginning and 53.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:20,812 INFO L168 Benchmark]: Boogie Preprocessor took 45.68 ms. Allocated memory is still 71.3 MB. Free memory was 53.6 MB in the beginning and 52.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:31:20,812 INFO L168 Benchmark]: RCFGBuilder took 418.18 ms. Allocated memory is still 71.3 MB. Free memory was 52.6 MB in the beginning and 43.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:20,813 INFO L168 Benchmark]: TraceAbstraction took 11297.33 ms. Allocated memory was 71.3 MB in the beginning and 104.9 MB in the end (delta: 33.6 MB). Free memory was 43.3 MB in the beginning and 76.8 MB in the end (delta: -33.4 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:20,814 INFO L168 Benchmark]: Witness Printer took 88.36 ms. Allocated memory is still 104.9 MB. Free memory was 76.8 MB in the beginning and 72.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:31:20,817 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30 ms. Allocated memory is still 71.3 MB. Free memory is still 51.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 232.77 ms. Allocated memory is still 71.3 MB. Free memory was 53.0 MB in the beginning and 55.3 MB in the end (delta: -2.3 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 70.58 ms. Allocated memory is still 71.3 MB. Free memory was 55.3 MB in the beginning and 53.9 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 45.68 ms. Allocated memory is still 71.3 MB. Free memory was 53.6 MB in the beginning and 52.6 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 418.18 ms. Allocated memory is still 71.3 MB. Free memory was 52.6 MB in the beginning and 43.6 MB in the end (delta: 9.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 11297.33 ms. Allocated memory was 71.3 MB in the beginning and 104.9 MB in the end (delta: 33.6 MB). Free memory was 43.3 MB in the beginning and 76.8 MB in the end (delta: -33.4 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. * Witness Printer took 88.36 ms. Allocated memory is still 104.9 MB. Free memory was 76.8 MB in the beginning and 72.6 MB in the end (delta: 4.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L21] int sn=0; [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L22] unsigned int loop1=__VERIFIER_nondet_uint(), n1=__VERIFIER_nondet_uint(); [L23] unsigned int x=0; [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND TRUE x<10 [L26] sn = sn + (2) [L28] x++ [L14] COND FALSE !(!(cond)) [L24] COND TRUE 1 [L25] COND FALSE !(x<10) [L28] x++ [L14] COND TRUE !(cond) [L15] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 11166.2ms, OverallIterations: 6, TraceHistogramMax: 11, EmptinessCheckTime: 31.8ms, AutomataDifference: 2643.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 49 SDtfs, 204 SDslu, 281 SDs, 0 SdLazy, 362 SolverSat, 99 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 530.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 405 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 2977.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=124occurred in iteration=5, InterpolantAutomatonStates: 67, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 80.4ms AutomataMinimizationTime, 5 MinimizatonAttempts, 35 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 105.9ms SsaConstructionTime, 368.7ms SatisfiabilityAnalysisTime, 3974.9ms InterpolantComputationTime, 244 NumberOfCodeBlocks, 244 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 372 ConstructedInterpolants, 0 QuantifiedInterpolants, 1845 SizeOfPredicates, 21 NumberOfNonLiveVariables, 522 ConjunctsInSsa, 84 ConjunctsInUnsatCore, 22 InterpolantComputations, 4 PerfectInterpolantSequences, 96/648 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-16 02:31:20,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a2de2766-376d-4abd-bb61-78435b09a56e/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...