./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/rangesum20.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/reducercommutativity/rangesum20.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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-4e77c04 [2021-10-13 08:09:57,103 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:09:57,105 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:09:57,158 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:09:57,159 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:09:57,163 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:09:57,165 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:09:57,169 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:09:57,172 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:09:57,178 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:09:57,180 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:09:57,181 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:09:57,182 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:09:57,185 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:09:57,187 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:09:57,191 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:09:57,193 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:09:57,194 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:09:57,197 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:09:57,205 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:09:57,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:09:57,209 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:09:57,212 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:09:57,213 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:09:57,223 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:09:57,223 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:09:57,224 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:09:57,226 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:09:57,227 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:09:57,228 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:09:57,229 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:09:57,230 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:09:57,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:09:57,233 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:09:57,235 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:09:57,236 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:09:57,236 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:09:57,237 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:09:57,237 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:09:57,238 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:09:57,239 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:09:57,240 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:09:57,287 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:09:57,288 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:09:57,290 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:09:57,290 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:09:57,291 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:09:57,291 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:09:57,291 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:09:57,291 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:09:57,292 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:09:57,292 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:09:57,300 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:09:57,300 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:09:57,301 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:09:57,301 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:09:57,301 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:09:57,302 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:09:57,302 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:09:57,303 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:09:57,303 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:09:57,303 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:09:57,303 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:09:57,303 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:09:57,304 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:09:57,304 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:09:57,304 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:09:57,304 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:09:57,305 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:09:57,305 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:09:57,305 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:09:57,307 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:09:57,307 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:09:57,307 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:09:57,308 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:09:57,308 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:09:57,308 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:09:57,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:09:57,309 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:09:57,309 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:09:57,309 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:09:57,309 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_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 [2021-10-13 08:09:57,659 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:09:57,683 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:09:57,686 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:09:57,688 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:09:57,689 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:09:57,690 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-10-13 08:09:57,784 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data/a06927ae8/6c4e63e684794866810049d5733c30a3/FLAG02935b24a [2021-10-13 08:09:58,422 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:09:58,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-10-13 08:09:58,440 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data/a06927ae8/6c4e63e684794866810049d5733c30a3/FLAG02935b24a [2021-10-13 08:09:58,772 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data/a06927ae8/6c4e63e684794866810049d5733c30a3 [2021-10-13 08:09:58,775 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:09:58,777 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:09:58,779 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:09:58,779 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:09:58,783 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:09:58,784 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:58" (1/1) ... [2021-10-13 08:09:58,785 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cfa6501 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:58, skipping insertion in model container [2021-10-13 08:09:58,785 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:09:58" (1/1) ... [2021-10-13 08:09:58,793 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:09:58,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:09:59,030 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_abe7b85b-3496-40d2-911e-2077bc9c6fa7/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2021-10-13 08:09:59,034 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:09:59,042 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:09:59,064 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_abe7b85b-3496-40d2-911e-2077bc9c6fa7/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2021-10-13 08:09:59,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:09:59,078 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:09:59,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59 WrapperNode [2021-10-13 08:09:59,079 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:09:59,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:09:59,080 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:09:59,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:09:59,087 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,094 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,119 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:09:59,120 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:09:59,120 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:09:59,120 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:09:59,129 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,129 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,133 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,133 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,141 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,146 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,148 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,152 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:09:59,153 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:09:59,153 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:09:59,153 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:09:59,154 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (1/1) ... [2021-10-13 08:09:59,161 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:09:59,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:09:59,204 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:09:59,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:09:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:09:59,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:09:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 08:09:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:09:59,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:09:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-13 08:09:59,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:09:59,806 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:09:59,806 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 08:09:59,809 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:59 BoogieIcfgContainer [2021-10-13 08:09:59,809 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:09:59,811 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:09:59,811 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:09:59,821 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:09:59,821 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:09:58" (1/3) ... [2021-10-13 08:09:59,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edacd96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:59, skipping insertion in model container [2021-10-13 08:09:59,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:09:59" (2/3) ... [2021-10-13 08:09:59,822 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4edacd96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:09:59, skipping insertion in model container [2021-10-13 08:09:59,822 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:09:59" (3/3) ... [2021-10-13 08:09:59,824 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2021-10-13 08:09:59,829 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:09:59,829 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:09:59,878 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:09:59,885 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:09:59,886 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:09:59,915 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) [2021-10-13 08:09:59,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:09:59,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:09:59,921 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:09:59,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:09:59,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:09:59,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1624531970, now seen corresponding path program 1 times [2021-10-13 08:09:59,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:09:59,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194943902] [2021-10-13 08:09:59,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:09:59,941 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:10:00,060 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:10:00,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985107745] [2021-10-13 08:10:00,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:00,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:00,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:00,064 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:00,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:10:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:00,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:10:00,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:00,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:00,245 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:00,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:00,297 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:10:00,298 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194943902] [2021-10-13 08:10:00,299 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:10:00,304 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985107745] [2021-10-13 08:10:00,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985107745] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:00,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:10:00,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 08:10:00,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555555697] [2021-10-13 08:10:00,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:10:00,315 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:10:00,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:10:00,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:10:00,336 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 10 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) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:00,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:00,371 INFO L93 Difference]: Finished difference Result 22 states and 33 transitions. [2021-10-13 08:10:00,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:10:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 08:10:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:00,383 INFO L225 Difference]: With dead ends: 22 [2021-10-13 08:10:00,383 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 08:10:00,386 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:10:00,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 08:10:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 08:10:00,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:00,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 15 transitions. [2021-10-13 08:10:00,428 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 15 transitions. Word has length 8 [2021-10-13 08:10:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:00,428 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 15 transitions. [2021-10-13 08:10:00,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:00,430 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 15 transitions. [2021-10-13 08:10:00,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 08:10:00,431 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:00,431 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:00,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:00,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 08:10:00,649 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:00,650 INFO L82 PathProgramCache]: Analyzing trace with hash -132988094, now seen corresponding path program 1 times [2021-10-13 08:10:00,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:10:00,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050750054] [2021-10-13 08:10:00,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:00,651 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:10:00,681 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:10:00,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1901665073] [2021-10-13 08:10:00,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:00,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:00,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:00,683 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:00,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:10:00,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:00,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:10:00,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:00,876 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 08:10:00,876 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:00,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-13 08:10:00,930 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:10:00,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050750054] [2021-10-13 08:10:00,931 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:10:00,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901665073] [2021-10-13 08:10:00,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901665073] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:00,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:10:00,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:10:00,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720755005] [2021-10-13 08:10:00,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:10:00,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:10:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:10:00,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:10:00,935 INFO L87 Difference]: Start difference. First operand 11 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:00,996 INFO L93 Difference]: Finished difference Result 23 states and 35 transitions. [2021-10-13 08:10:00,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:10:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 08:10:01,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:01,005 INFO L225 Difference]: With dead ends: 23 [2021-10-13 08:10:01,005 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 08:10:01,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:10:01,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 08:10:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 08:10:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:01,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2021-10-13 08:10:01,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 10 [2021-10-13 08:10:01,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:01,016 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2021-10-13 08:10:01,017 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:01,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2021-10-13 08:10:01,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:10:01,020 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:01,020 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:01,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:01,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:01,249 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:01,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:01,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1151414046, now seen corresponding path program 1 times [2021-10-13 08:10:01,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:10:01,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266638023] [2021-10-13 08:10:01,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:01,251 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:10:01,310 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:10:01,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [684375913] [2021-10-13 08:10:01,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:01,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:01,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:01,314 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:01,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 08:10:01,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:01,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:10:01,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:01,466 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:10:01,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:01,546 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:10:01,547 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:10:01,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266638023] [2021-10-13 08:10:01,547 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:10:01,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684375913] [2021-10-13 08:10:01,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684375913] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:01,548 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:10:01,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:10:01,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426190344] [2021-10-13 08:10:01,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:10:01,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:10:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:10:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:10:01,555 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-10-13 08:10:01,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:01,582 INFO L93 Difference]: Finished difference Result 25 states and 31 transitions. [2021-10-13 08:10:01,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:10:01,583 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) Word has length 16 [2021-10-13 08:10:01,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:01,584 INFO L225 Difference]: With dead ends: 25 [2021-10-13 08:10:01,584 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 08:10:01,585 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:10:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 08:10:01,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 08:10:01,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:01,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2021-10-13 08:10:01,600 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 16 [2021-10-13 08:10:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:01,602 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2021-10-13 08:10:01,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 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) [2021-10-13 08:10:01,603 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2021-10-13 08:10:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 08:10:01,604 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:01,605 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:01,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:01,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:01,818 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:01,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:01,819 INFO L82 PathProgramCache]: Analyzing trace with hash 2095232066, now seen corresponding path program 1 times [2021-10-13 08:10:01,819 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:10:01,819 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380398135] [2021-10-13 08:10:01,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:01,820 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:10:01,841 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:10:01,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1273912079] [2021-10-13 08:10:01,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:01,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:01,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:01,843 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:01,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 08:10:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:01,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:01,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:10:02,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:02,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-13 08:10:02,133 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:10:02,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380398135] [2021-10-13 08:10:02,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:10:02,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273912079] [2021-10-13 08:10:02,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273912079] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:02,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2064137156] [2021-10-13 08:10:02,160 INFO L159 IcfgInterpreter]: Started Sifa with 9 locations of interest [2021-10-13 08:10:02,160 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:10:02,167 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:10:02,173 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:10:02,174 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:10:02,238 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:02,243 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:10:02,244 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:02,244 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:10:02,248 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:10:02,249 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:02,249 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:10:02,254 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 134 [2021-10-13 08:10:02,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:10:02,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:10:02,288 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:10:02,345 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 08:10:02,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 08:10:02,351 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:02,354 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:10:02,358 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:02,365 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 08:10:02,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:10:02,367 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:10:02,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:02,433 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:10:02,436 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 115 [2021-10-13 08:10:02,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:10:02,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:131, output treesize:115 [2021-10-13 08:10:02,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:02,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:02,653 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_12| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:10:02,656 INFO L168 Benchmark]: Toolchain (without parser) took 3879.01 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 57.5 MB in the beginning and 76.4 MB in the end (delta: -18.9 MB). Peak memory consumption was 22.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:02,657 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 62.1 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:10:02,657 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.61 ms. Allocated memory is still 92.3 MB. Free memory was 57.3 MB in the beginning and 67.5 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:02,658 INFO L168 Benchmark]: Boogie Procedure Inliner took 39.16 ms. Allocated memory is still 92.3 MB. Free memory was 67.5 MB in the beginning and 65.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:02,664 INFO L168 Benchmark]: Boogie Preprocessor took 31.87 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 64.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:10:02,666 INFO L168 Benchmark]: RCFGBuilder took 656.52 ms. Allocated memory is still 92.3 MB. Free memory was 64.1 MB in the beginning and 42.8 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:02,667 INFO L168 Benchmark]: TraceAbstraction took 2844.54 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 42.4 MB in the beginning and 76.4 MB in the end (delta: -34.0 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:02,669 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 92.3 MB. Free memory was 62.1 MB in the beginning and 62.1 MB in the end (delta: 29.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.61 ms. Allocated memory is still 92.3 MB. Free memory was 57.3 MB in the beginning and 67.5 MB in the end (delta: -10.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 39.16 ms. Allocated memory is still 92.3 MB. Free memory was 67.5 MB in the beginning and 65.5 MB in the end (delta: 2.0 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 31.87 ms. Allocated memory is still 92.3 MB. Free memory was 65.5 MB in the beginning and 64.1 MB in the end (delta: 1.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 656.52 ms. Allocated memory is still 92.3 MB. Free memory was 64.1 MB in the beginning and 42.8 MB in the end (delta: 21.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2844.54 ms. Allocated memory was 92.3 MB in the beginning and 134.2 MB in the end (delta: 41.9 MB). Free memory was 42.4 MB in the beginning and 76.4 MB in the end (delta: -34.0 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_12| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_12|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:10:02,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:10:05,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:10:05,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:10:05,398 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:10:05,399 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:10:05,400 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:10:05,402 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:10:05,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:10:05,406 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:10:05,408 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:10:05,409 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:10:05,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:10:05,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:10:05,412 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:10:05,414 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:10:05,415 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:10:05,416 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:10:05,417 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:10:05,419 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:10:05,422 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:10:05,424 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:10:05,425 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:10:05,426 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:10:05,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:10:05,431 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:10:05,432 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:10:05,432 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:10:05,433 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:10:05,434 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:10:05,435 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:10:05,435 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:10:05,436 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:10:05,437 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:10:05,438 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:10:05,440 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:10:05,440 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:10:05,441 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:10:05,441 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:10:05,442 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:10:05,443 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:10:05,444 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:10:05,445 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:10:05,473 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:10:05,473 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:10:05,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:10:05,474 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:10:05,474 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:10:05,475 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:10:05,475 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:10:05,475 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:10:05,475 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:10:05,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:10:05,477 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:10:05,477 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:10:05,477 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:10:05,477 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:10:05,478 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:10:05,478 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:10:05,478 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:10:05,478 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:10:05,478 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:10:05,479 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:10:05,479 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:10:05,479 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:10:05,479 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:10:05,480 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:10:05,480 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:10:05,480 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:10:05,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:10:05,481 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:10:05,481 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:10:05,481 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:10:05,481 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:10:05,482 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:05,482 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:10:05,482 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:10:05,482 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:10:05,483 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_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 15b22eac1c9abf5483bb158aadbf00f9ee3ca223 [2021-10-13 08:10:05,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:10:05,868 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:10:05,871 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:10:05,873 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:10:05,874 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:10:05,875 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-10-13 08:10:05,954 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data/59477b531/80b9cb0b152f4960bcd7001006c3482f/FLAG1af448319 [2021-10-13 08:10:06,669 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:10:06,674 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/sv-benchmarks/c/reducercommutativity/rangesum20.i [2021-10-13 08:10:06,683 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data/59477b531/80b9cb0b152f4960bcd7001006c3482f/FLAG1af448319 [2021-10-13 08:10:06,997 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/data/59477b531/80b9cb0b152f4960bcd7001006c3482f [2021-10-13 08:10:07,000 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:10:07,002 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:10:07,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:10:07,005 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:10:07,009 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:10:07,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:06" (1/1) ... [2021-10-13 08:10:07,012 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c191dec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07, skipping insertion in model container [2021-10-13 08:10:07,012 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:10:06" (1/1) ... [2021-10-13 08:10:07,021 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:10:07,045 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:10:07,228 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_abe7b85b-3496-40d2-911e-2077bc9c6fa7/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2021-10-13 08:10:07,240 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:10:07,254 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:10:07,306 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_abe7b85b-3496-40d2-911e-2077bc9c6fa7/sv-benchmarks/c/reducercommutativity/rangesum20.i[1465,1478] [2021-10-13 08:10:07,307 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:10:07,324 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:10:07,325 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07 WrapperNode [2021-10-13 08:10:07,325 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:10:07,326 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:10:07,326 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:10:07,326 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:10:07,365 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,408 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,439 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:10:07,440 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:10:07,441 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:10:07,441 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:10:07,453 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,459 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,470 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,476 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,483 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:10:07,484 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:10:07,484 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:10:07,485 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:10:07,486 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (1/1) ... [2021-10-13 08:10:07,495 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:10:07,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:07,529 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:10:07,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:10:07,594 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:10:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:10:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-13 08:10:07,595 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:10:07,595 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:10:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:10:07,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 08:10:08,778 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:10:08,778 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-10-13 08:10:08,781 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:08 BoogieIcfgContainer [2021-10-13 08:10:08,781 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:10:08,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:10:08,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:10:08,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:10:08,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:10:06" (1/3) ... [2021-10-13 08:10:08,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61868b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:08, skipping insertion in model container [2021-10-13 08:10:08,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:10:07" (2/3) ... [2021-10-13 08:10:08,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@61868b37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:10:08, skipping insertion in model container [2021-10-13 08:10:08,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:08" (3/3) ... [2021-10-13 08:10:08,794 INFO L111 eAbstractionObserver]: Analyzing ICFG rangesum20.i [2021-10-13 08:10:08,825 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:10:08,825 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 08:10:08,889 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:10:08,897 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-13 08:10:08,897 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 08:10:08,912 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:08,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:10:08,920 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:08,920 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:08,921 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:08,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:08,929 INFO L82 PathProgramCache]: Analyzing trace with hash -919167012, now seen corresponding path program 1 times [2021-10-13 08:10:08,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:08,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [250820512] [2021-10-13 08:10:08,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:08,946 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:08,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:08,947 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:08,960 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:10:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:10:09,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:09,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:09,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:09,522 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:09,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [250820512] [2021-10-13 08:10:09,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [250820512] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:09,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:10:09,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:10:09,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452110302] [2021-10-13 08:10:09,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:10:09,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:09,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:10:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:10:09,548 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 29 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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) [2021-10-13 08:10:09,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:09,566 INFO L93 Difference]: Finished difference Result 56 states and 86 transitions. [2021-10-13 08:10:09,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:10:09,567 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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) Word has length 17 [2021-10-13 08:10:09,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:09,576 INFO L225 Difference]: With dead ends: 56 [2021-10-13 08:10:09,576 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 08:10:09,579 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:10:09,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 08:10:09,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 08:10:09,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.44) internal successors, (36), 25 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:09,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 36 transitions. [2021-10-13 08:10:09,612 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 36 transitions. Word has length 17 [2021-10-13 08:10:09,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:09,613 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 36 transitions. [2021-10-13 08:10:09,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.5) internal successors, (17), 2 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) [2021-10-13 08:10:09,613 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 36 transitions. [2021-10-13 08:10:09,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:10:09,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:09,626 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:09,647 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:09,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:10:09,841 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:09,844 INFO L82 PathProgramCache]: Analyzing trace with hash 164788593, now seen corresponding path program 1 times [2021-10-13 08:10:09,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:09,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1361949278] [2021-10-13 08:10:09,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:09,846 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:09,846 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:09,847 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:09,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:10:10,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:10,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:10:10,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:10,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:10,354 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:10,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:10,441 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:10,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1361949278] [2021-10-13 08:10:10,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1361949278] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:10,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:10:10,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:10:10,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570704701] [2021-10-13 08:10:10,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:10:10,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:10,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:10:10,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:10:10,446 INFO L87 Difference]: Start difference. First operand 26 states and 36 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:10,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:10,480 INFO L93 Difference]: Finished difference Result 51 states and 72 transitions. [2021-10-13 08:10:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:10:10,481 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 08:10:10,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:10,482 INFO L225 Difference]: With dead ends: 51 [2021-10-13 08:10:10,482 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 08:10:10,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:10:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 08:10:10,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 08:10:10,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:10,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2021-10-13 08:10:10,491 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 17 [2021-10-13 08:10:10,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:10,491 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2021-10-13 08:10:10,492 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:10,492 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2021-10-13 08:10:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:10:10,493 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:10,494 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:10,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:10,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:10:10,714 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:10,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:10,715 INFO L82 PathProgramCache]: Analyzing trace with hash -790773651, now seen corresponding path program 1 times [2021-10-13 08:10:10,716 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:10,716 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [745179432] [2021-10-13 08:10:10,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:10,716 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:10,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:10,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:10,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:10:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:11,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:11,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:11,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:11,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:11,331 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:11,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [745179432] [2021-10-13 08:10:11,332 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [745179432] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:11,332 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2026690173] [2021-10-13 08:10:11,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:11,332 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:11,332 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:11,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:11,345 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 08:10:11,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:11,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:10:11,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:10:11,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:11,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:10:11,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2026690173] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:11,670 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 08:10:11,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5] total 9 [2021-10-13 08:10:11,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470253069] [2021-10-13 08:10:11,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:10:11,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:11,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:10:11,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:10:11,673 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:12,059 INFO L93 Difference]: Finished difference Result 67 states and 92 transitions. [2021-10-13 08:10:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:10:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-10-13 08:10:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:12,061 INFO L225 Difference]: With dead ends: 67 [2021-10-13 08:10:12,062 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 08:10:12,062 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-13 08:10:12,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 08:10:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-10-13 08:10:12,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.425) internal successors, (57), 40 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 57 transitions. [2021-10-13 08:10:12,071 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 57 transitions. Word has length 21 [2021-10-13 08:10:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:12,071 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 57 transitions. [2021-10-13 08:10:12,072 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 57 transitions. [2021-10-13 08:10:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 08:10:12,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:12,074 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:12,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:12,288 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:12,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:10:12,476 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:12,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:12,477 INFO L82 PathProgramCache]: Analyzing trace with hash -532548631, now seen corresponding path program 1 times [2021-10-13 08:10:12,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:12,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1776992069] [2021-10-13 08:10:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:12,478 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:12,479 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:12,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 08:10:12,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:12,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:12,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:12,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:12,866 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:12,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1776992069] [2021-10-13 08:10:12,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1776992069] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:12,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [691647931] [2021-10-13 08:10:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:12,868 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:12,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:12,873 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:12,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Waiting until timeout for monitored process [2021-10-13 08:10:13,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:13,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:13,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:13,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:13,149 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:10:13,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [691647931] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:13,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599322912] [2021-10-13 08:10:13,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:13,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:13,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:13,248 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:13,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 08:10:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:13,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:10:13,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:13,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:10:13,802 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:14,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-13 08:10:14,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599322912] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:14,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:10:14,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [5, 5, 5, 5] total 16 [2021-10-13 08:10:14,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233125797] [2021-10-13 08:10:14,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:10:14,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:14,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:10:14,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:10:14,101 INFO L87 Difference]: Start difference. First operand 41 states and 57 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:14,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:14,721 INFO L93 Difference]: Finished difference Result 98 states and 127 transitions. [2021-10-13 08:10:14,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:10:14,724 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 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 21 [2021-10-13 08:10:14,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:14,725 INFO L225 Difference]: With dead ends: 98 [2021-10-13 08:10:14,726 INFO L226 Difference]: Without dead ends: 93 [2021-10-13 08:10:14,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 105 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 425.8ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:10:14,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-13 08:10:14,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2021-10-13 08:10:14,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 60 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:14,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 86 transitions. [2021-10-13 08:10:14,737 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 86 transitions. Word has length 21 [2021-10-13 08:10:14,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:14,737 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 86 transitions. [2021-10-13 08:10:14,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 86 transitions. [2021-10-13 08:10:14,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 08:10:14,739 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:14,739 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:14,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:14,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (7)] Ended with exit code 0 [2021-10-13 08:10:15,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:15,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:15,351 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash -781348630, now seen corresponding path program 1 times [2021-10-13 08:10:15,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:15,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36903294] [2021-10-13 08:10:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:15,353 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:15,353 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:15,354 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:15,357 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-13 08:10:15,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:15,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:15,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:15,670 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:10:15,670 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:15,808 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:10:15,809 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:15,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36903294] [2021-10-13 08:10:15,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36903294] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:15,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [957779252] [2021-10-13 08:10:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:15,810 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:15,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:15,815 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:15,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-10-13 08:10:16,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:16,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:16,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:16,535 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:10:16,535 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-13 08:10:16,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [957779252] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:16,628 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392163639] [2021-10-13 08:10:16,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:16,629 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:16,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:16,630 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:16,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 08:10:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:17,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:10:17,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:10:17,177 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:17,277 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 08:10:17,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392163639] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:17,278 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:10:17,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5, 5, 5, 5] total 10 [2021-10-13 08:10:17,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439920470] [2021-10-13 08:10:17,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:10:17,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:17,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:10:17,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:10:17,280 INFO L87 Difference]: Start difference. First operand 61 states and 86 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:17,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:17,408 INFO L93 Difference]: Finished difference Result 131 states and 191 transitions. [2021-10-13 08:10:17,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:10:17,408 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-10-13 08:10:17,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:17,411 INFO L225 Difference]: With dead ends: 131 [2021-10-13 08:10:17,411 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 08:10:17,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:10:17,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 08:10:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2021-10-13 08:10:17,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 78 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:17,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 104 transitions. [2021-10-13 08:10:17,427 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 104 transitions. Word has length 24 [2021-10-13 08:10:17,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:17,428 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 104 transitions. [2021-10-13 08:10:17,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:17,429 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 104 transitions. [2021-10-13 08:10:17,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 08:10:17,430 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:17,431 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:17,452 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:17,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2021-10-13 08:10:17,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:18,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:18,047 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:18,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:18,048 INFO L82 PathProgramCache]: Analyzing trace with hash -358269621, now seen corresponding path program 1 times [2021-10-13 08:10:18,048 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:18,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1847526991] [2021-10-13 08:10:18,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:18,048 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:18,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:18,052 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:18,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 08:10:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:18,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:18,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:18,511 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:10:18,511 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:18,692 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:10:18,692 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:18,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1847526991] [2021-10-13 08:10:18,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1847526991] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:18,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [183922275] [2021-10-13 08:10:18,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:18,693 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:18,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:18,695 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:18,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 08:10:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:18,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:10:18,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 08:10:19,109 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 08:10:19,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [183922275] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:19,291 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400603776] [2021-10-13 08:10:19,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:19,291 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:19,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:19,297 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:19,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 08:10:19,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:20,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:10:20,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:20,190 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 08:10:20,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-10-13 08:10:20,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400603776] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:20,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:10:20,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4, 4, 4, 4] total 12 [2021-10-13 08:10:20,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864096373] [2021-10-13 08:10:20,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 08:10:20,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:20,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 08:10:20,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:10:20,304 INFO L87 Difference]: Start difference. First operand 79 states and 104 transitions. Second operand has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:21,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:21,827 INFO L93 Difference]: Finished difference Result 245 states and 340 transitions. [2021-10-13 08:10:21,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:10:21,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 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 39 [2021-10-13 08:10:21,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:21,830 INFO L225 Difference]: With dead ends: 245 [2021-10-13 08:10:21,830 INFO L226 Difference]: Without dead ends: 173 [2021-10-13 08:10:21,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 267.5ms TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:10:21,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2021-10-13 08:10:21,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 125. [2021-10-13 08:10:21,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.403225806451613) internal successors, (174), 124 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:21,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 174 transitions. [2021-10-13 08:10:21,847 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 174 transitions. Word has length 39 [2021-10-13 08:10:21,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:21,847 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 174 transitions. [2021-10-13 08:10:21,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.5) internal successors, (66), 12 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:21,848 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 174 transitions. [2021-10-13 08:10:21,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 08:10:21,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:21,850 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:21,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:22,064 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-10-13 08:10:22,283 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-10-13 08:10:22,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:22,453 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1109413569, now seen corresponding path program 1 times [2021-10-13 08:10:22,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:22,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [630253174] [2021-10-13 08:10:22,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:22,454 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:22,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:22,455 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:22,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-10-13 08:10:22,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:10:23,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:23,307 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:10:23,307 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:23,738 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:10:23,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:23,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [630253174] [2021-10-13 08:10:23,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [630253174] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:23,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [517192988] [2021-10-13 08:10:23,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:23,739 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:23,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:23,740 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:23,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-10-13 08:10:25,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:25,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:10:25,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:25,337 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:10:25,337 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:25,529 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-10-13 08:10:25,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [517192988] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:25,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247616761] [2021-10-13 08:10:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:25,530 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:25,530 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:25,533 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:25,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 08:10:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:26,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 08:10:26,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:26,642 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-13 08:10:26,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-10-13 08:10:26,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247616761] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:10:26,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 4 imperfect interpolant sequences. [2021-10-13 08:10:26,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [9, 9, 9, 9] total 18 [2021-10-13 08:10:26,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464534765] [2021-10-13 08:10:26,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:10:26,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:26,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:10:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-13 08:10:26,816 INFO L87 Difference]: Start difference. First operand 125 states and 174 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2021-10-13 08:10:26,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:26,856 INFO L93 Difference]: Finished difference Result 167 states and 233 transitions. [2021-10-13 08:10:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:10:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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 47 [2021-10-13 08:10:26,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:26,859 INFO L225 Difference]: With dead ends: 167 [2021-10-13 08:10:26,859 INFO L226 Difference]: Without dead ends: 131 [2021-10-13 08:10:26,862 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 367.3ms TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-10-13 08:10:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-10-13 08:10:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2021-10-13 08:10:26,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.3846153846153846) internal successors, (180), 130 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:26,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 180 transitions. [2021-10-13 08:10:26,904 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 180 transitions. Word has length 47 [2021-10-13 08:10:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:26,905 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 180 transitions. [2021-10-13 08:10:26,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 4 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) [2021-10-13 08:10:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 180 transitions. [2021-10-13 08:10:26,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 08:10:26,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:26,914 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:26,930 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:27,148 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:27,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:27,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:27,515 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:27,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:27,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1522869053, now seen corresponding path program 1 times [2021-10-13 08:10:27,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:27,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1142355587] [2021-10-13 08:10:27,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:27,516 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:27,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:27,517 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:27,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-10-13 08:10:28,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:28,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:10:28,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:28,416 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 08:10:28,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:28,867 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 08:10:28,868 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:28,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1142355587] [2021-10-13 08:10:28,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1142355587] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:28,869 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1241233229] [2021-10-13 08:10:28,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:28,869 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:28,869 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:28,884 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:28,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-10-13 08:10:30,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:30,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:10:30,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 08:10:30,741 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:30,983 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-10-13 08:10:30,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1241233229] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:30,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447318557] [2021-10-13 08:10:30,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:30,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:30,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:30,989 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:30,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 08:10:31,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:32,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:32,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:32,394 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-13 08:10:32,394 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:32,741 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2021-10-13 08:10:32,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447318557] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:32,742 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:10:32,742 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 4, 5] total 21 [2021-10-13 08:10:32,743 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051630292] [2021-10-13 08:10:32,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 08:10:32,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:32,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 08:10:32,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2021-10-13 08:10:32,745 INFO L87 Difference]: Start difference. First operand 131 states and 180 transitions. Second operand has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:34,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:34,157 INFO L93 Difference]: Finished difference Result 317 states and 445 transitions. [2021-10-13 08:10:34,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 08:10:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 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 51 [2021-10-13 08:10:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:34,159 INFO L225 Difference]: With dead ends: 317 [2021-10-13 08:10:34,159 INFO L226 Difference]: Without dead ends: 201 [2021-10-13 08:10:34,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 283 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1115.7ms TimeCoverageRelationStatistics Valid=205, Invalid=607, Unknown=0, NotChecked=0, Total=812 [2021-10-13 08:10:34,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-10-13 08:10:34,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 184. [2021-10-13 08:10:34,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.273224043715847) internal successors, (233), 183 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 233 transitions. [2021-10-13 08:10:34,178 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 233 transitions. Word has length 51 [2021-10-13 08:10:34,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:34,179 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 233 transitions. [2021-10-13 08:10:34,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.8095238095238093) internal successors, (80), 21 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:34,179 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 233 transitions. [2021-10-13 08:10:34,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-13 08:10:34,184 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:34,184 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:34,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (19)] Ended with exit code 0 [2021-10-13 08:10:34,434 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2021-10-13 08:10:34,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:34,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:10:34,795 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:34,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:34,796 INFO L82 PathProgramCache]: Analyzing trace with hash 248331838, now seen corresponding path program 1 times [2021-10-13 08:10:34,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:34,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1539945819] [2021-10-13 08:10:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:34,797 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:34,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:34,798 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:34,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-10-13 08:10:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:35,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 08:10:35,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-13 08:10:35,807 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:36,885 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-13 08:10:36,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:36,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1539945819] [2021-10-13 08:10:36,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1539945819] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:36,886 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1998045850] [2021-10-13 08:10:36,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:36,887 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:36,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:36,903 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:36,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Waiting until timeout for monitored process [2021-10-13 08:10:37,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:37,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 08:10:37,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-13 08:10:38,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:38,624 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2021-10-13 08:10:38,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1998045850] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:38,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215711158] [2021-10-13 08:10:38,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:38,625 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:38,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:38,630 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:38,631 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 08:10:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:39,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:10:39,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:39,855 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-10-13 08:10:39,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:40,373 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2021-10-13 08:10:40,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215711158] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:40,374 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:10:40,374 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17, 5, 5] total 38 [2021-10-13 08:10:40,374 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360686121] [2021-10-13 08:10:40,375 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 08:10:40,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:40,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 08:10:40,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=1144, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 08:10:40,378 INFO L87 Difference]: Start difference. First operand 184 states and 233 transitions. Second operand has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:42,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:42,141 INFO L93 Difference]: Finished difference Result 365 states and 476 transitions. [2021-10-13 08:10:42,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 08:10:42,142 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 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 88 [2021-10-13 08:10:42,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:42,144 INFO L225 Difference]: With dead ends: 365 [2021-10-13 08:10:42,145 INFO L226 Difference]: Without dead ends: 212 [2021-10-13 08:10:42,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 486 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 2155.5ms TimeCoverageRelationStatistics Valid=366, Invalid=1526, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 08:10:42,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-10-13 08:10:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2021-10-13 08:10:42,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.2369668246445498) internal successors, (261), 211 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:42,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 261 transitions. [2021-10-13 08:10:42,161 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 261 transitions. Word has length 88 [2021-10-13 08:10:42,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:42,162 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 261 transitions. [2021-10-13 08:10:42,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.0526315789473686) internal successors, (116), 38 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 261 transitions. [2021-10-13 08:10:42,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-10-13 08:10:42,168 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:42,168 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:42,193 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (21)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:42,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (22)] Ended with exit code 0 [2021-10-13 08:10:42,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:42,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:42,785 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash 965050562, now seen corresponding path program 2 times [2021-10-13 08:10:42,786 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:42,786 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1590477762] [2021-10-13 08:10:42,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:10:42,786 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:42,786 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:42,787 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:42,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-10-13 08:10:43,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:10:43,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:10:43,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:10:43,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-10-13 08:10:43,846 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:44,240 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-10-13 08:10:44,241 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:44,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1590477762] [2021-10-13 08:10:44,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1590477762] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:44,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [467092507] [2021-10-13 08:10:44,241 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:10:44,241 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:44,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:44,242 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:44,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Waiting until timeout for monitored process [2021-10-13 08:10:45,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:10:45,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:10:45,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:10:45,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:46,140 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-10-13 08:10:46,141 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:46,453 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 493 trivial. 0 not checked. [2021-10-13 08:10:46,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [467092507] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:46,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356121996] [2021-10-13 08:10:46,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:10:46,454 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:46,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:46,455 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:46,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 08:10:47,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:10:47,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:10:47,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:10:47,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 9 proven. 26 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-10-13 08:10:47,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:48,607 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2021-10-13 08:10:48,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356121996] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:48,608 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:10:48,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 9] total 17 [2021-10-13 08:10:48,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544557053] [2021-10-13 08:10:48,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 08:10:48,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:48,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 08:10:48,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-10-13 08:10:48,611 INFO L87 Difference]: Start difference. First operand 212 states and 261 transitions. Second operand has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:49,920 INFO L93 Difference]: Finished difference Result 532 states and 738 transitions. [2021-10-13 08:10:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 08:10:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 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 108 [2021-10-13 08:10:49,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:49,927 INFO L225 Difference]: With dead ends: 532 [2021-10-13 08:10:49,927 INFO L226 Difference]: Without dead ends: 378 [2021-10-13 08:10:49,928 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 654 GetRequests, 633 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 842.5ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-10-13 08:10:49,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-10-13 08:10:49,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-10-13 08:10:49,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.1653543307086613) internal successors, (296), 254 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:49,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 296 transitions. [2021-10-13 08:10:49,947 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 296 transitions. Word has length 108 [2021-10-13 08:10:49,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:49,948 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 296 transitions. [2021-10-13 08:10:49,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 5.411764705882353) internal successors, (92), 17 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:10:49,948 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 296 transitions. [2021-10-13 08:10:49,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-10-13 08:10:49,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:49,951 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 11, 11, 11, 11, 11, 11, 6, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:49,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:50,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (25)] Ended with exit code 0 [2021-10-13 08:10:50,384 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:50,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:10:50,573 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:50,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:50,573 INFO L82 PathProgramCache]: Analyzing trace with hash 70930950, now seen corresponding path program 1 times [2021-10-13 08:10:50,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:50,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2055599207] [2021-10-13 08:10:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:50,574 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:50,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:50,575 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:50,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-10-13 08:10:51,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:51,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:10:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:51,938 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 96 proven. 40 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2021-10-13 08:10:51,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:52,578 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 96 proven. 40 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2021-10-13 08:10:52,578 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:10:52,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2055599207] [2021-10-13 08:10:52,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2055599207] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:52,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1080316247] [2021-10-13 08:10:52,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:52,579 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:10:52,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:10:52,580 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:10:52,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Waiting until timeout for monitored process [2021-10-13 08:10:53,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:53,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:10:53,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:54,240 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2021-10-13 08:10:54,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2021-10-13 08:10:55,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1080316247] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:55,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364252616] [2021-10-13 08:10:55,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:10:55,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:10:55,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:10:55,072 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:10:55,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 08:10:56,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:10:56,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:10:56,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:10:57,290 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 21 proven. 155 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-13 08:10:57,290 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:10:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 964 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2021-10-13 08:10:59,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364252616] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:10:59,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:10:59,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9, 9, 13, 15] total 46 [2021-10-13 08:10:59,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146723904] [2021-10-13 08:10:59,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-13 08:10:59,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:10:59,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-13 08:10:59,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 08:10:59,416 INFO L87 Difference]: Start difference. First operand 255 states and 296 transitions. Second operand has 46 states, 46 states have (on average 4.086956521739131) internal successors, (188), 46 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:08,615 INFO L93 Difference]: Finished difference Result 2393 states and 3298 transitions. [2021-10-13 08:13:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 247 states. [2021-10-13 08:13:08,617 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 4.086956521739131) internal successors, (188), 46 states have internal predecessors, (188), 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 168 [2021-10-13 08:13:08,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:08,636 INFO L225 Difference]: With dead ends: 2393 [2021-10-13 08:13:08,637 INFO L226 Difference]: Without dead ends: 2199 [2021-10-13 08:13:08,665 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1489 GetRequests, 1201 SyntacticMatches, 0 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31546 ImplicationChecksByTransitivity, 105503.4ms TimeCoverageRelationStatistics Valid=8002, Invalid=75808, Unknown=0, NotChecked=0, Total=83810 [2021-10-13 08:13:08,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-10-13 08:13:08,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 785. [2021-10-13 08:13:08,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 1.2015306122448979) internal successors, (942), 784 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 942 transitions. [2021-10-13 08:13:08,783 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 942 transitions. Word has length 168 [2021-10-13 08:13:08,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:08,784 INFO L470 AbstractCegarLoop]: Abstraction has 785 states and 942 transitions. [2021-10-13 08:13:08,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 4.086956521739131) internal successors, (188), 46 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:08,785 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 942 transitions. [2021-10-13 08:13:08,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2021-10-13 08:13:08,790 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:08,791 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 11, 11, 11, 9, 9, 9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:08,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (28)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:09,030 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (27)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:09,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:09,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:09,421 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:09,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:09,421 INFO L82 PathProgramCache]: Analyzing trace with hash -751640007, now seen corresponding path program 2 times [2021-10-13 08:13:09,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:13:09,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742830027] [2021-10-13 08:13:09,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:13:09,422 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:13:09,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:13:09,423 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:13:09,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-10-13 08:13:12,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:13:12,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:13:12,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:13:12,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:13:12,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:13,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:13:13,731 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:13:13,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742830027] [2021-10-13 08:13:13,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742830027] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:13,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [813719018] [2021-10-13 08:13:13,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:13:13,732 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:13:13,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:13:13,733 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:13:13,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-10-13 08:13:18,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:13:18,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:13:18,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:13:18,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:18,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:13:18,745 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:19,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:13:19,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [813719018] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:19,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498393227] [2021-10-13 08:13:19,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:13:19,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:13:19,307 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:13:19,307 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:13:19,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-13 08:13:22,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:13:22,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:13:22,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 08:13:22,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:13:23,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:13:23,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:13:24,074 INFO L134 CoverageAnalysis]: Checked inductivity of 2206 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:13:24,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498393227] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:13:24,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:13:24,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 9, 9] total 16 [2021-10-13 08:13:24,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10893557] [2021-10-13 08:13:24,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 08:13:24,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:13:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 08:13:24,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-10-13 08:13:24,078 INFO L87 Difference]: Start difference. First operand 785 states and 942 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:25,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:13:25,050 INFO L93 Difference]: Finished difference Result 1052 states and 1271 transitions. [2021-10-13 08:13:25,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 08:13:25,051 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 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 249 [2021-10-13 08:13:25,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:13:25,058 INFO L225 Difference]: With dead ends: 1052 [2021-10-13 08:13:25,058 INFO L226 Difference]: Without dead ends: 817 [2021-10-13 08:13:25,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1494 GetRequests, 1474 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 806.0ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-10-13 08:13:25,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-10-13 08:13:25,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 817. [2021-10-13 08:13:25,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 1.1936274509803921) internal successors, (974), 816 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:25,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 974 transitions. [2021-10-13 08:13:25,140 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 974 transitions. Word has length 249 [2021-10-13 08:13:25,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:13:25,141 INFO L470 AbstractCegarLoop]: Abstraction has 817 states and 974 transitions. [2021-10-13 08:13:25,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:13:25,142 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 974 transitions. [2021-10-13 08:13:25,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-10-13 08:13:25,148 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:13:25,149 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 14, 14, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:13:25,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-13 08:13:25,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-10-13 08:13:25,586 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-10-13 08:13:25,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:13:25,773 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:13:25,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:13:25,773 INFO L82 PathProgramCache]: Analyzing trace with hash 697777193, now seen corresponding path program 3 times [2021-10-13 08:13:25,774 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:13:25,775 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [147657081] [2021-10-13 08:13:25,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:13:25,775 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:13:25,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:13:25,776 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:13:25,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (33)] Waiting until timeout for monitored process [2021-10-13 08:15:13,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 08:15:13,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:15:16,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 08:15:16,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:17,889 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:15:17,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:19,884 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:15:19,885 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:15:19,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [147657081] [2021-10-13 08:15:19,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [147657081] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:15:19,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [936760147] [2021-10-13 08:15:19,885 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:15:19,886 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:15:19,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:15:19,896 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:15:19,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (34)] Waiting until timeout for monitored process [2021-10-13 08:15:43,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 08:15:43,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:15:43,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 08:15:43,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:15:46,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:15:46,181 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:15:49,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 588 refuted. 0 times theorem prover too weak. 1778 trivial. 0 not checked. [2021-10-13 08:15:49,213 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [936760147] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:15:49,213 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834858348] [2021-10-13 08:15:49,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:15:49,213 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:15:49,214 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:15:49,216 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:15:49,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 08:19:58,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 08:19:58,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:19:58,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 08:19:58,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:19:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:19:59,491 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:20:00,453 INFO L134 CoverageAnalysis]: Checked inductivity of 2366 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2170 trivial. 0 not checked. [2021-10-13 08:20:00,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834858348] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:20:00,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:20:00,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18, 28, 17, 18] total 59 [2021-10-13 08:20:00,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779039523] [2021-10-13 08:20:00,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-13 08:20:00,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:20:00,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-13 08:20:00,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=607, Invalid=2815, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 08:20:00,459 INFO L87 Difference]: Start difference. First operand 817 states and 974 transitions. Second operand has 59 states, 59 states have (on average 2.76271186440678) internal successors, (163), 59 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:20:33,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:20:33,393 INFO L93 Difference]: Finished difference Result 1117 states and 1352 transitions. [2021-10-13 08:20:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 08:20:33,395 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.76271186440678) internal successors, (163), 59 states have internal predecessors, (163), 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 265 [2021-10-13 08:20:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:20:33,400 INFO L225 Difference]: With dead ends: 1117 [2021-10-13 08:20:33,401 INFO L226 Difference]: Without dead ends: 882 [2021-10-13 08:20:33,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1637 GetRequests, 1528 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3068 ImplicationChecksByTransitivity, 34224.5ms TimeCoverageRelationStatistics Valid=2110, Invalid=10100, Unknown=0, NotChecked=0, Total=12210 [2021-10-13 08:20:33,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-10-13 08:20:33,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 881. [2021-10-13 08:20:33,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 881 states, 880 states have (on average 1.1818181818181819) internal successors, (1040), 880 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:20:33,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 881 states to 881 states and 1040 transitions. [2021-10-13 08:20:33,546 INFO L78 Accepts]: Start accepts. Automaton has 881 states and 1040 transitions. Word has length 265 [2021-10-13 08:20:33,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:20:33,546 INFO L470 AbstractCegarLoop]: Abstraction has 881 states and 1040 transitions. [2021-10-13 08:20:33,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.76271186440678) internal successors, (163), 59 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:20:33,547 INFO L276 IsEmpty]: Start isEmpty. Operand 881 states and 1040 transitions. [2021-10-13 08:20:33,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2021-10-13 08:20:33,552 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:20:33,552 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 19, 19, 11, 11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:20:33,643 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-13 08:20:33,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (33)] Forceful destruction successful, exit code 0 [2021-10-13 08:20:33,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (34)] Forceful destruction successful, exit code 0 [2021-10-13 08:20:34,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:20:34,177 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:20:34,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:20:34,177 INFO L82 PathProgramCache]: Analyzing trace with hash 355397791, now seen corresponding path program 4 times [2021-10-13 08:20:34,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:20:34,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [248422525] [2021-10-13 08:20:34,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 08:20:34,178 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:20:34,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:20:34,180 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:20:34,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (36)] Waiting until timeout for monitored process [2021-10-13 08:20:40,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 08:20:40,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 08:20:40,700 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:20:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:20:45,285 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:20:45,286 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:20:45,287 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:20:45,335 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (36)] Ended with exit code 0 [2021-10-13 08:20:45,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:20:45,496 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:20:45,747 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:20:45 BoogieIcfgContainer [2021-10-13 08:20:45,748 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:20:45,750 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:20:45,750 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:20:45,750 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:20:45,751 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:10:08" (3/4) ... [2021-10-13 08:20:45,753 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:20:45,969 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:20:45,969 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:20:45,971 INFO L168 Benchmark]: Toolchain (without parser) took 638967.49 ms. Allocated memory was 56.6 MB in the beginning and 182.5 MB in the end (delta: 125.8 MB). Free memory was 35.2 MB in the beginning and 50.2 MB in the end (delta: -15.0 MB). Peak memory consumption was 129.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:20:45,972 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory is still 38.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:20:45,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 321.10 ms. Allocated memory is still 56.6 MB. Free memory was 34.9 MB in the beginning and 24.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:20:45,973 INFO L168 Benchmark]: Boogie Procedure Inliner took 113.58 ms. Allocated memory is still 56.6 MB. Free memory was 24.4 MB in the beginning and 39.3 MB in the end (delta: -14.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:20:45,974 INFO L168 Benchmark]: Boogie Preprocessor took 42.92 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 37.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:20:45,974 INFO L168 Benchmark]: RCFGBuilder took 1296.83 ms. Allocated memory is still 56.6 MB. Free memory was 37.7 MB in the beginning and 25.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:20:45,975 INFO L168 Benchmark]: TraceAbstraction took 636960.58 ms. Allocated memory was 56.6 MB in the beginning and 182.5 MB in the end (delta: 125.8 MB). Free memory was 24.8 MB in the beginning and 49.1 MB in the end (delta: -24.3 MB). Peak memory consumption was 136.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:20:45,975 INFO L168 Benchmark]: Witness Printer took 219.46 ms. Allocated memory is still 182.5 MB. Free memory was 49.1 MB in the beginning and 50.2 MB in the end (delta: -1.1 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:20:45,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 56.6 MB. Free memory is still 38.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 321.10 ms. Allocated memory is still 56.6 MB. Free memory was 34.9 MB in the beginning and 24.4 MB in the end (delta: 10.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 113.58 ms. Allocated memory is still 56.6 MB. Free memory was 24.4 MB in the beginning and 39.3 MB in the end (delta: -14.9 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.92 ms. Allocated memory is still 56.6 MB. Free memory was 39.3 MB in the beginning and 37.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1296.83 ms. Allocated memory is still 56.6 MB. Free memory was 37.7 MB in the beginning and 25.3 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 636960.58 ms. Allocated memory was 56.6 MB in the beginning and 182.5 MB in the end (delta: 125.8 MB). Free memory was 24.8 MB in the beginning and 49.1 MB in the end (delta: -24.3 MB). Peak memory consumption was 136.6 MB. Max. memory is 16.1 GB. * Witness Printer took 219.46 ms. Allocated memory is still 182.5 MB. Free memory was 49.1 MB in the beginning and 50.2 MB in the end (delta: -1.1 MB). Peak memory consumption was 18.9 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: 61]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L42] int x[20]; [L16] int i; [L17] i = 0 [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND TRUE i < 20 [L18] x[i] = __VERIFIER_nondet_int() [L17] i++ [L17] COND FALSE !(i < 20) [L44] int temp; [L45] int ret; [L46] int ret2; [L47] int ret5; [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L49] ret = rangesum(x) [L51] EXPR x[0] [L51] temp=x[0] [L51] EXPR x[1] [L51] x[0] = x[1] [L51] x[1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L52] ret2 = rangesum(x) [L53] EXPR x[0] [L53] temp=x[0] [L54] int i =0 ; [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND TRUE i<20 -1 [L55] EXPR x[i+1] [L55] x[i] = x[i+1] [L54] i++ [L54] COND FALSE !(i<20 -1) [L57] x[20 -1] = temp [L24] int i; [L25] long long ret; [L26] ret = 0 [L27] int cnt = 0; [L28] i = 0 [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND FALSE !(i > 20/2) [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND TRUE i < 20 [L29] COND TRUE i > 20/2 [L30] EXPR x[i] [L30] ret = ret + x[i] [L31] cnt = cnt + 1 [L28] i++ [L28] COND FALSE !(i < 20) [L34] COND TRUE cnt !=0 [L35] return ret / cnt; [L58] ret5 = rangesum(x) [L60] COND TRUE ret != ret2 || ret !=ret5 [L61] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 636607.1ms, OverallIterations: 14, TraceHistogramMax: 20, EmptinessCheckTime: 67.7ms, AutomataDifference: 170465.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 403 SDtfs, 11696 SDslu, 2361 SDs, 0 SdLazy, 9721 SolverSat, 9803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28703.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7023 GetRequests, 6454 SyntacticMatches, 1 SemanticMatches, 568 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34994 ImplicationChecksByTransitivity, 145928.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=881occurred in iteration=13, InterpolantAutomatonStates: 418, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 510.7ms AutomataMinimizationTime, 13 MinimizatonAttempts, 1646 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 667.7ms SsaConstructionTime, 397442.4ms SatisfiabilityAnalysisTime, 36819.9ms InterpolantComputationTime, 3531 NumberOfCodeBlocks, 3333 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 6444 ConstructedInterpolants, 0 QuantifiedInterpolants, 10672 SizeOfPredicates, 33 NumberOfNonLiveVariables, 5794 ConjunctsInSsa, 265 ConjunctsInUnsatCore, 68 InterpolantComputations, 12 PerfectInterpolantSequences, 35040/38800 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! [2021-10-13 08:20:46,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_abe7b85b-3496-40d2-911e-2077bc9c6fa7/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...