./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/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_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/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_af139905-5a2f-43b9-b6ff-2222bd86237a/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 f7920dae4fa1aaae1d36ed15e0c19f03a8ddeadf ..................................................................................................................................................................................................................................................................................................................................................................................................................... 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_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/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_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/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_af139905-5a2f-43b9-b6ff-2222bd86237a/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 f7920dae4fa1aaae1d36ed15e0c19f03a8ddeadf ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 08:02:54,112 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:02:54,114 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:02:54,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:02:54,144 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:02:54,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:02:54,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:02:54,150 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:02:54,152 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:02:54,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:02:54,155 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:02:54,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:02:54,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:02:54,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:02:54,160 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:02:54,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:02:54,163 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:02:54,164 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:02:54,166 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:02:54,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:02:54,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:02:54,172 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:02:54,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:02:54,174 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:02:54,178 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:02:54,178 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:02:54,179 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:02:54,180 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:02:54,181 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:02:54,182 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:02:54,182 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:02:54,183 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:02:54,184 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:02:54,185 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:02:54,186 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:02:54,187 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:02:54,187 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:02:54,188 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:02:54,188 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:02:54,189 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:02:54,190 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:02:54,191 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 08:02:54,216 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:02:54,216 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:02:54,217 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:02:54,217 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:02:54,217 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:02:54,218 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:02:54,218 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:02:54,218 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:02:54,218 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:02:54,218 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:02:54,219 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:02:54,219 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:02:54,219 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:02:54,219 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:02:54,220 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:02:54,220 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:02:54,220 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:02:54,221 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:02:54,221 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:02:54,221 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:02:54,221 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:02:54,222 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:02:54,222 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:02:54,222 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:02:54,222 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:02:54,222 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:02:54,223 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:02:54,223 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:02:54,223 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:02:54,223 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:02:54,224 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:02:54,224 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:02:54,224 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:02:54,224 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:02:54,224 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:02:54,225 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:02:54,225 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:02:54,225 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:02:54,225 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:02:54,226 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7920dae4fa1aaae1d36ed15e0c19f03a8ddeadf [2021-10-13 08:02:54,527 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:02:54,551 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:02:54,554 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:02:54,555 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:02:54,556 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:02:54,557 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2021-10-13 08:02:54,630 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data/efad9df1d/47527ec9b2bc4b2c8549f02240dc0d1e/FLAG78ff372a9 [2021-10-13 08:02:55,096 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:02:55,097 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2021-10-13 08:02:55,119 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data/efad9df1d/47527ec9b2bc4b2c8549f02240dc0d1e/FLAG78ff372a9 [2021-10-13 08:02:55,468 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data/efad9df1d/47527ec9b2bc4b2c8549f02240dc0d1e [2021-10-13 08:02:55,471 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:02:55,473 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:02:55,483 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:02:55,483 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:02:55,486 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:02:55,487 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,488 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@30bbfbc3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55, skipping insertion in model container [2021-10-13 08:02:55,489 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,497 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:02:55,514 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:02:55,786 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_af139905-5a2f-43b9-b6ff-2222bd86237a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2021-10-13 08:02:55,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:02:55,818 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:02:55,832 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_af139905-5a2f-43b9-b6ff-2222bd86237a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2021-10-13 08:02:55,841 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:02:55,858 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:02:55,859 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55 WrapperNode [2021-10-13 08:02:55,859 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:02:55,861 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:02:55,861 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:02:55,861 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:02:55,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,880 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:02:55,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:02:55,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:02:55,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:02:55,916 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,917 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,919 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:02:55,934 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:02:55,934 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:02:55,934 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:02:55,935 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (1/1) ... [2021-10-13 08:02:55,945 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:02:55,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:55,977 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:02:55,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:02:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 08:02:56,030 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:02:56,031 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:02:56,031 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:02:56,338 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:02:56,338 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 08:02:56,342 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:56 BoogieIcfgContainer [2021-10-13 08:02:56,342 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:02:56,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:02:56,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:02:56,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:02:56,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:02:55" (1/3) ... [2021-10-13 08:02:56,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5a2012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:56, skipping insertion in model container [2021-10-13 08:02:56,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:02:55" (2/3) ... [2021-10-13 08:02:56,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c5a2012 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:02:56, skipping insertion in model container [2021-10-13 08:02:56,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:02:56" (3/3) ... [2021-10-13 08:02:56,354 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2021-10-13 08:02:56,361 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:02:56,375 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 08:02:56,461 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:02:56,470 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 08:02:56,471 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 08:02:56,490 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 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 08:02:56,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:02:56,497 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:56,498 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:02:56,499 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:56,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:56,508 INFO L82 PathProgramCache]: Analyzing trace with hash 93462408, now seen corresponding path program 1 times [2021-10-13 08:02:56,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:02:56,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119020749] [2021-10-13 08:02:56,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:56,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:02:56,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:56,699 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 08:02:56,699 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:02:56,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119020749] [2021-10-13 08:02:56,701 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119020749] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:56,701 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:56,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 08:02:56,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968431950] [2021-10-13 08:02:56,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:02:56,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:02:56,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:02:56,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:02:56,725 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 16 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) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 08:02:56,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:56,740 INFO L93 Difference]: Finished difference Result 33 states and 43 transitions. [2021-10-13 08:02:56,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:02:56,741 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 5 [2021-10-13 08:02:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:56,749 INFO L225 Difference]: With dead ends: 33 [2021-10-13 08:02:56,750 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 08:02:56,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:02:56,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 08:02:56,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 08:02:56,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 14 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 08:02:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-10-13 08:02:56,784 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 5 [2021-10-13 08:02:56,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:56,785 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-10-13 08:02:56,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 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 08:02:56,786 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-10-13 08:02:56,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:02:56,787 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:56,787 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:02:56,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:02:56,788 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:56,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:56,789 INFO L82 PathProgramCache]: Analyzing trace with hash 92788139, now seen corresponding path program 1 times [2021-10-13 08:02:56,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:02:56,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609546580] [2021-10-13 08:02:56,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:56,791 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:02:56,807 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:02:56,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1463310910] [2021-10-13 08:02:56,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:56,809 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:56,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:56,811 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:56,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:02:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:56,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 08:02:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:57,072 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 08:02:57,073 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:57,170 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 08:02:57,170 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:02:57,171 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609546580] [2021-10-13 08:02:57,171 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:02:57,172 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463310910] [2021-10-13 08:02:57,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463310910] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:02:57,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:02:57,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 08:02:57,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677928747] [2021-10-13 08:02:57,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 08:02:57,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:02:57,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 08:02:57,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 08:02:57,177 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:59,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:02:59,354 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2021-10-13 08:02:59,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 08:02:59,358 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 08:02:59,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:02:59,359 INFO L225 Difference]: With dead ends: 43 [2021-10-13 08:02:59,359 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 08:02:59,360 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:02:59,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 08:02:59,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 25. [2021-10-13 08:02:59,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:59,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2021-10-13 08:02:59,367 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 5 [2021-10-13 08:02:59,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:02:59,368 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2021-10-13 08:02:59,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:02:59,368 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2021-10-13 08:02:59,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 08:02:59,369 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:02:59,369 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:02:59,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-10-13 08:02:59,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:59,583 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:02:59,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:02:59,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1170197384, now seen corresponding path program 1 times [2021-10-13 08:02:59,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:02:59,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158566500] [2021-10-13 08:02:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:59,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:02:59,600 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 08:02:59,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [913564938] [2021-10-13 08:02:59,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:02:59,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:02:59,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:02:59,611 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:02:59,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 08:02:59,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:02:59,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:02:59,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:02:59,808 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:59,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:02:59,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:02:59,871 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:02:59,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158566500] [2021-10-13 08:02:59,871 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 08:02:59,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913564938] [2021-10-13 08:02:59,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [913564938] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:02:59,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [525532227] [2021-10-13 08:02:59,892 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2021-10-13 08:02:59,893 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:02:59,897 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:02:59,902 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:02:59,915 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:02:59,972 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:59,988 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:02:59,991 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:02:59,994 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 08:02:59,995 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:02:59,999 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:00,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 08:03:00,010 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 162 [2021-10-13 08:03:00,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:03:00,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:03:00,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 08:03:00,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 08:03:00,097 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:00,098 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:03:00,099 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:00,099 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 08:03:00,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:03:00,109 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-13 08:03:00,110 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:00,110 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:03:00,111 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:00,111 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 08:03:00,112 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 08:03:00,113 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:03:00,151 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:03:00,156 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.0 percent of original size [2021-10-13 08:03:00,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 149 [2021-10-13 08:03:00,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:03:00,169 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:300, output treesize:149 [2021-10-13 08:03:00,205 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:00,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:00,383 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_14| 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 08:03:00,387 INFO L168 Benchmark]: Toolchain (without parser) took 4913.93 ms. Allocated memory is still 132.1 MB. Free memory was 93.9 MB in the beginning and 83.9 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:00,388 INFO L168 Benchmark]: CDTParser took 0.92 ms. Allocated memory is still 132.1 MB. Free memory was 110.4 MB in the beginning and 110.3 MB in the end (delta: 73.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:00,388 INFO L168 Benchmark]: CACSL2BoogieTranslator took 377.17 ms. Allocated memory is still 132.1 MB. Free memory was 93.7 MB in the beginning and 106.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:00,389 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.91 ms. Allocated memory is still 132.1 MB. Free memory was 106.5 MB in the beginning and 105.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:00,390 INFO L168 Benchmark]: Boogie Preprocessor took 27.46 ms. Allocated memory is still 132.1 MB. Free memory was 104.8 MB in the beginning and 104.0 MB in the end (delta: 779.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:00,390 INFO L168 Benchmark]: RCFGBuilder took 408.86 ms. Allocated memory is still 132.1 MB. Free memory was 104.0 MB in the beginning and 91.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:00,395 INFO L168 Benchmark]: TraceAbstraction took 4041.20 ms. Allocated memory is still 132.1 MB. Free memory was 91.0 MB in the beginning and 83.9 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:03:00,401 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.92 ms. Allocated memory is still 132.1 MB. Free memory was 110.4 MB in the beginning and 110.3 MB in the end (delta: 73.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 377.17 ms. Allocated memory is still 132.1 MB. Free memory was 93.7 MB in the beginning and 106.5 MB in the end (delta: -12.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 43.91 ms. Allocated memory is still 132.1 MB. Free memory was 106.5 MB in the beginning and 105.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.46 ms. Allocated memory is still 132.1 MB. Free memory was 104.8 MB in the beginning and 104.0 MB in the end (delta: 779.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 408.86 ms. Allocated memory is still 132.1 MB. Free memory was 104.0 MB in the beginning and 91.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4041.20 ms. Allocated memory is still 132.1 MB. Free memory was 91.0 MB in the beginning and 83.9 MB in the end (delta: 7.1 MB). Peak memory consumption was 7.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_14| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_14|: 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 08:03:00,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/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 08:03:02,745 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:03:02,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:03:02,801 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:03:02,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:03:02,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:03:02,808 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:03:02,812 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:03:02,815 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:03:02,823 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:03:02,824 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:03:02,826 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:03:02,827 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:03:02,830 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:03:02,832 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:03:02,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:03:02,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:03:02,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:03:02,845 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:03:02,852 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:03:02,854 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:03:02,855 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:03:02,859 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:03:02,860 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:03:02,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:03:02,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:03:02,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:03:02,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:03:02,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:03:02,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:03:02,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:03:02,878 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:03:02,880 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:03:02,880 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:03:02,882 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:03:02,882 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:03:02,883 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:03:02,883 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:03:02,884 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:03:02,885 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:03:02,886 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:03:02,891 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 08:03:02,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:03:02,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:03:02,953 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:03:02,953 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:03:02,953 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:03:02,953 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:03:02,954 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:03:02,954 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:03:02,954 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:03:02,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:03:02,956 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:03:02,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:03:02,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:03:02,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 08:03:02,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:03:02,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 08:03:02,958 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:03:02,958 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:03:02,958 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:03:02,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:03:02,959 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 08:03:02,959 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:03:02,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 08:03:02,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:03:02,960 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:03:02,960 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:03:02,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:03:02,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:03:02,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:03:02,961 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 08:03:02,961 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:03:02,961 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:03:02,961 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 08:03:02,962 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:03:02,962 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:03:02,962 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_af139905-5a2f-43b9-b6ff-2222bd86237a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f7920dae4fa1aaae1d36ed15e0c19f03a8ddeadf [2021-10-13 08:03:03,334 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:03:03,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:03:03,362 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:03:03,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:03:03,365 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:03:03,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2021-10-13 08:03:03,436 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data/aa911d1f9/3d8bd1c685df4f939034bcfd55ee4f56/FLAGc2aa92726 [2021-10-13 08:03:03,949 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:03:03,950 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c [2021-10-13 08:03:03,957 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data/aa911d1f9/3d8bd1c685df4f939034bcfd55ee4f56/FLAGc2aa92726 [2021-10-13 08:03:04,312 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/data/aa911d1f9/3d8bd1c685df4f939034bcfd55ee4f56 [2021-10-13 08:03:04,314 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:03:04,316 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:03:04,317 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:03:04,317 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:03:04,320 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:03:04,321 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,322 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@38f9e95b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04, skipping insertion in model container [2021-10-13 08:03:04,323 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,331 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:03:04,344 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:03:04,479 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_af139905-5a2f-43b9-b6ff-2222bd86237a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2021-10-13 08:03:04,502 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:03:04,513 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:03:04,524 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_af139905-5a2f-43b9-b6ff-2222bd86237a/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_unwindbound5.c[458,471] [2021-10-13 08:03:04,533 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:03:04,568 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:03:04,569 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04 WrapperNode [2021-10-13 08:03:04,569 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:03:04,570 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:03:04,570 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:03:04,571 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:03:04,589 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,595 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,636 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:03:04,637 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:03:04,638 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:03:04,638 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:03:04,645 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,652 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,653 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,675 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,679 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,681 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,684 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:03:04,687 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:03:04,687 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:03:04,687 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:03:04,688 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (1/1) ... [2021-10-13 08:03:04,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:03:04,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:04,716 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:03:04,745 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:03:04,760 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 08:03:04,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:03:04,760 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:03:04,760 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:03:05,755 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:03:05,755 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-13 08:03:05,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:05 BoogieIcfgContainer [2021-10-13 08:03:05,758 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:03:05,759 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:03:05,760 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:03:05,762 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:03:05,763 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:03:04" (1/3) ... [2021-10-13 08:03:05,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2985c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:05, skipping insertion in model container [2021-10-13 08:03:05,764 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:03:04" (2/3) ... [2021-10-13 08:03:05,764 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e2985c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:03:05, skipping insertion in model container [2021-10-13 08:03:05,765 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:05" (3/3) ... [2021-10-13 08:03:05,766 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_unwindbound5.c [2021-10-13 08:03:05,772 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:03:05,772 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 08:03:05,826 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:03:05,832 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 08:03:05,833 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 08:03:05,845 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:03:05,850 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:05,850 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:05,851 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:05,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:05,856 INFO L82 PathProgramCache]: Analyzing trace with hash 120120651, now seen corresponding path program 1 times [2021-10-13 08:03:05,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:05,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1266926775] [2021-10-13 08:03:05,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:05,869 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:05,870 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:05,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:05,887 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:03:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:06,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 08:03:06,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:06,231 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 08:03:06,232 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:06,293 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 08:03:06,294 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:06,294 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1266926775] [2021-10-13 08:03:06,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1266926775] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:06,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:06,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:03:06,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106814603] [2021-10-13 08:03:06,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 08:03:06,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:06,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 08:03:06,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:03:06,322 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:06,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:06,338 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-10-13 08:03:06,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 08:03:06,340 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 08:03:06,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:06,348 INFO L225 Difference]: With dead ends: 41 [2021-10-13 08:03:06,348 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 08:03:06,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 08:03:06,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 08:03:06,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 08:03:06,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 17 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 08:03:06,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-10-13 08:03:06,384 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-10-13 08:03:06,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:06,385 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-10-13 08:03:06,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:06,385 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-10-13 08:03:06,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 08:03:06,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:06,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:06,408 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:06,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:03:06,604 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:06,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:06,605 INFO L82 PathProgramCache]: Analyzing trace with hash 176704684, now seen corresponding path program 1 times [2021-10-13 08:03:06,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:06,606 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813590728] [2021-10-13 08:03:06,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:06,607 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:06,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:06,608 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:06,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:03:06,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:06,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:03:06,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:07,121 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 08:03:07,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:11,746 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 08:03:11,747 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:11,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813590728] [2021-10-13 08:03:11,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813590728] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:03:11,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:03:11,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:03:11,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752531969] [2021-10-13 08:03:11,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:03:11,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:11,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:03:11,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:03:11,753 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:25,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:25,026 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2021-10-13 08:03:25,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 08:03:25,065 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-13 08:03:25,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:25,066 INFO L225 Difference]: With dead ends: 46 [2021-10-13 08:03:25,066 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 08:03:25,067 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 6963.5ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:03:25,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 08:03:25,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 28. [2021-10-13 08:03:25,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 25 states have (on average 1.24) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:25,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-13 08:03:25,077 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 8 [2021-10-13 08:03:25,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:25,078 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-13 08:03:25,078 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:25,079 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-13 08:03:25,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 08:03:25,080 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:25,080 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:25,099 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:25,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:03:25,295 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:25,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:25,296 INFO L82 PathProgramCache]: Analyzing trace with hash 687671895, now seen corresponding path program 1 times [2021-10-13 08:03:25,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:25,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [361675194] [2021-10-13 08:03:25,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:25,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:25,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:25,303 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:25,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:03:25,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:25,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:03:25,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:26,000 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:26,267 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:26,268 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:26,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [361675194] [2021-10-13 08:03:26,268 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [361675194] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:26,268 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [168946042] [2021-10-13 08:03:26,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:26,269 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:03:26,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:03:26,276 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:03:26,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 08:03:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:27,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:03:27,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:27,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:27,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:27,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [168946042] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:27,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223002401] [2021-10-13 08:03:27,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:27,433 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:03:27,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:03:27,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:03:27,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 08:03:27,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:27,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:03:27,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:28,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:28,004 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:28,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:28,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223002401] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:28,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:03:28,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-13 08:03:28,140 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440837982] [2021-10-13 08:03:28,140 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 08:03:28,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:03:28,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 08:03:28,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:03:28,142 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:30,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:03:30,683 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2021-10-13 08:03:30,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 08:03:30,684 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 08:03:30,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:03:30,685 INFO L225 Difference]: With dead ends: 58 [2021-10-13 08:03:30,685 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 08:03:30,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-10-13 08:03:30,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 08:03:30,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2021-10-13 08:03:30,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 31 states have (on average 1.2258064516129032) internal successors, (38), 33 states have internal predecessors, (38), 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 08:03:30,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-10-13 08:03:30,696 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 15 [2021-10-13 08:03:30,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:03:30,696 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-10-13 08:03:30,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:03:30,697 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-10-13 08:03:30,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 08:03:30,698 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:03:30,698 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1] [2021-10-13 08:03:30,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:30,937 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:03:31,105 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Ended with exit code 0 [2021-10-13 08:03:31,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:03:31,299 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:03:31,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:03:31,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1290921348, now seen corresponding path program 1 times [2021-10-13 08:03:31,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:03:31,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1301225050] [2021-10-13 08:03:31,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:31,301 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:03:31,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:03:31,301 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:03:31,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 08:03:31,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:31,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:03:31,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:03:36,404 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:03:36,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:03:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 08:03:58,541 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:03:58,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1301225050] [2021-10-13 08:03:58,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1301225050] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:03:58,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [670383944] [2021-10-13 08:03:58,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:03:58,541 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:03:58,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:03:58,542 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:03:58,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 08:03:59,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:03:59,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 08:03:59,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:02,310 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:04:02,310 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-10-13 08:04:23,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [670383944] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:23,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300149551] [2021-10-13 08:04:23,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:04:23,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:04:23,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:04:23,864 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:04:23,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 08:04:24,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:04:24,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 08:04:24,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:04:30,589 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:04:30,589 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:04:49,392 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 08:04:49,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300149551] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:04:49,393 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:04:49,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6, 4, 8, 5] total 11 [2021-10-13 08:04:49,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946420775] [2021-10-13 08:04:49,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 08:04:49,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:04:49,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 08:04:49,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-10-13 08:04:49,396 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 08:05:11,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:05:11,422 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2021-10-13 08:05:11,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 08:05:11,423 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 08:05:11,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:05:11,424 INFO L225 Difference]: With dead ends: 44 [2021-10-13 08:05:11,425 INFO L226 Difference]: Without dead ends: 40 [2021-10-13 08:05:11,425 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 79 SyntacticMatches, 6 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 56370.7ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-10-13 08:05:11,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-13 08:05:11,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 28. [2021-10-13 08:05:11,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:05:11,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2021-10-13 08:05:11,435 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 16 [2021-10-13 08:05:11,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:05:11,435 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2021-10-13 08:05:11,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 11 states have internal predecessors, (34), 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 08:05:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2021-10-13 08:05:11,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 08:05:11,437 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:05:11,437 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:05:11,523 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 08:05:11,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:05:11,854 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:05:12,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:05:12,046 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:05:12,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:05:12,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1329593552, now seen corresponding path program 1 times [2021-10-13 08:05:12,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:05:12,047 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [985098833] [2021-10-13 08:05:12,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:05:12,048 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:05:12,048 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:05:12,049 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:05:12,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 08:05:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:05:12,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:05:12,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:05:13,682 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 08:05:13,682 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:05:25,993 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 08:05:25,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:05:25,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [985098833] [2021-10-13 08:05:25,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [985098833] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:05:25,994 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1574037787] [2021-10-13 08:05:25,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:05:25,994 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:05:25,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:05:25,995 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:05:25,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 08:05:27,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:05:27,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 08:05:27,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:05:27,612 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 08:05:27,612 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:05:35,471 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 08:05:35,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1574037787] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:05:35,472 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148550404] [2021-10-13 08:05:35,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:05:35,472 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:05:35,473 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:05:35,474 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:05:35,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 08:05:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:05:36,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 08:05:36,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:05:36,567 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 08:05:36,567 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:05:42,884 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 08:05:42,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148550404] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:05:42,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:05:42,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 6, 8, 6] total 15 [2021-10-13 08:05:42,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213656451] [2021-10-13 08:05:42,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 08:05:42,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:05:42,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 08:05:42,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-10-13 08:05:42,887 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 08:05:54,323 WARN L207 SmtUtils]: Spent 7.03 s on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-10-13 08:07:12,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:07:12,044 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-10-13 08:07:12,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 08:07:12,059 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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) Word has length 17 [2021-10-13 08:07:12,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:07:12,060 INFO L225 Difference]: With dead ends: 50 [2021-10-13 08:07:12,060 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 08:07:12,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 80524.2ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 08:07:12,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 08:07:12,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-10-13 08:07:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:07:12,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-10-13 08:07:12,071 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2021-10-13 08:07:12,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:07:12,071 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-10-13 08:07:12,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 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 08:07:12,072 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-10-13 08:07:12,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 08:07:12,073 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:07:12,073 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:07:12,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 08:07:12,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 08:07:12,504 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 08:07:12,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:07:12,699 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:07:12,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:07:12,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1901162899, now seen corresponding path program 2 times [2021-10-13 08:07:12,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:07:12,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [898110453] [2021-10-13 08:07:12,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:07:12,700 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:07:12,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:07:12,701 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:07:12,707 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 08:07:13,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:07:13,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:07:13,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 08:07:13,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:07:14,390 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:14,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:07:14,972 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:14,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:07:14,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [898110453] [2021-10-13 08:07:14,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [898110453] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:07:14,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1109400810] [2021-10-13 08:07:14,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:07:14,973 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:07:14,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:07:14,975 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:07:14,983 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 08:07:17,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:07:17,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:07:17,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 08:07:17,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:07:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:17,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:07:17,819 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:17,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1109400810] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:07:17,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355707553] [2021-10-13 08:07:17,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:07:17,820 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:07:17,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:07:17,822 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:07:17,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 08:07:19,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:07:19,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:07:19,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 08:07:19,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:07:19,600 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:19,600 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:07:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:19,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355707553] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:07:19,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:07:19,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 7, 7] total 13 [2021-10-13 08:07:19,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598404662] [2021-10-13 08:07:19,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 08:07:19,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:07:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 08:07:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-13 08:07:19,876 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:07:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:07:25,268 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-10-13 08:07:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 08:07:25,269 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-10-13 08:07:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:07:25,270 INFO L225 Difference]: With dead ends: 38 [2021-10-13 08:07:25,271 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 08:07:25,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 734.4ms TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-10-13 08:07:25,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 08:07:25,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 08:07:25,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 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 08:07:25,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-10-13 08:07:25,281 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 27 [2021-10-13 08:07:25,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:07:25,281 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-10-13 08:07:25,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 08:07:25,282 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-10-13 08:07:25,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 08:07:25,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:07:25,283 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:07:25,312 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-13 08:07:25,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 08:07:25,729 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-13 08:07:25,898 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:07:25,898 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:07:25,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:07:25,898 INFO L82 PathProgramCache]: Analyzing trace with hash -736656116, now seen corresponding path program 2 times [2021-10-13 08:07:25,899 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:07:25,899 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1753379022] [2021-10-13 08:07:25,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:07:25,899 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:07:25,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:07:25,900 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:07:25,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-10-13 08:07:27,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:07:27,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:07:27,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 08:07:27,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:07:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:28,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:07:56,902 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:07:56,902 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:07:56,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1753379022] [2021-10-13 08:07:56,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1753379022] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:07:56,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [872405552] [2021-10-13 08:07:56,903 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:07:56,903 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:07:56,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:07:56,905 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:07:56,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-10-13 08:07:59,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:07:59,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:07:59,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 08:07:59,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:00,894 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:15,655 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:15,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [872405552] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:15,656 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683449962] [2021-10-13 08:08:15,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:08:15,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:08:15,656 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:08:15,658 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:08:15,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 08:08:17,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 08:08:17,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:08:17,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 08:08:17,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:08:18,458 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:18,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:08:34,064 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:08:34,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683449962] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:08:34,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:08:34,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 11, 9, 11, 9] total 20 [2021-10-13 08:08:34,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875111039] [2021-10-13 08:08:34,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 08:08:34,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:08:34,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 08:08:34,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2021-10-13 08:08:34,067 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 08:08:52,533 WARN L207 SmtUtils]: Spent 8.93 s on a formula simplification. DAG size of input: 77 DAG size of output: 72 [2021-10-13 08:09:03,987 WARN L207 SmtUtils]: Spent 8.22 s on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2021-10-13 08:09:12,710 WARN L207 SmtUtils]: Spent 5.62 s on a formula simplification. DAG size of input: 76 DAG size of output: 71 [2021-10-13 08:09:20,532 WARN L207 SmtUtils]: Spent 5.74 s on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2021-10-13 08:09:29,353 WARN L207 SmtUtils]: Spent 6.60 s on a formula simplification. DAG size of input: 73 DAG size of output: 67 [2021-10-13 08:09:37,755 WARN L207 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 61 DAG size of output: 55 [2021-10-13 08:09:45,063 WARN L207 SmtUtils]: Spent 6.03 s on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2021-10-13 08:10:02,189 WARN L207 SmtUtils]: Spent 6.29 s on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-10-13 08:10:37,511 WARN L207 SmtUtils]: Spent 6.72 s on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2021-10-13 08:10:48,616 WARN L207 SmtUtils]: Spent 7.32 s on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2021-10-13 08:10:48,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:10:48,783 INFO L93 Difference]: Finished difference Result 100 states and 105 transitions. [2021-10-13 08:10:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 08:10:48,800 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-10-13 08:10:48,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:10:48,802 INFO L225 Difference]: With dead ends: 100 [2021-10-13 08:10:48,802 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 08:10:48,804 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 147 SyntacticMatches, 4 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 130912.5ms TimeCoverageRelationStatistics Valid=627, Invalid=1823, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 08:10:48,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 08:10:48,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 54. [2021-10-13 08:10:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.1320754716981132) internal successors, (60), 53 states have internal predecessors, (60), 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 08:10:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2021-10-13 08:10:48,824 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 29 [2021-10-13 08:10:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:10:48,824 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2021-10-13 08:10:48,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.25) internal successors, (65), 20 states have internal predecessors, (65), 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 08:10:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2021-10-13 08:10:48,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 08:10:48,826 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:10:48,827 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:10:48,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:49,070 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (17)] Ended with exit code 0 [2021-10-13 08:10:49,286 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-10-13 08:10:49,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:10:49,452 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 08:10:49,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:10:49,452 INFO L82 PathProgramCache]: Analyzing trace with hash -732108121, now seen corresponding path program 3 times [2021-10-13 08:10:49,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:10:49,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1260764337] [2021-10-13 08:10:49,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 08:10:49,453 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:10:49,453 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:10:49,454 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:10:49,455 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-10-13 08:10:52,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 08:10:52,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-10-13 08:10:52,656 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 08:10:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 08:10:54,745 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 08:10:54,745 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 08:10:54,746 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:10:54,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:10:54,749 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 08:10:54,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-10-13 08:10:54,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:10:54,957 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:10:55,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:10:55 BoogieIcfgContainer [2021-10-13 08:10:55,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:10:55,005 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:10:55,006 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:10:55,006 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:10:55,006 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:03:05" (3/4) ... [2021-10-13 08:10:55,009 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 08:10:55,095 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:10:55,096 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:10:55,097 INFO L168 Benchmark]: Toolchain (without parser) took 470780.77 ms. Allocated memory was 71.3 MB in the beginning and 94.4 MB in the end (delta: 23.1 MB). Free memory was 55.9 MB in the beginning and 36.9 MB in the end (delta: 19.0 MB). Peak memory consumption was 41.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:55,097 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 71.3 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:10:55,098 INFO L168 Benchmark]: CACSL2BoogieTranslator took 252.58 ms. Allocated memory is still 71.3 MB. Free memory was 55.6 MB in the beginning and 55.8 MB in the end (delta: -210.7 kB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:55,099 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.26 ms. Allocated memory is still 71.3 MB. Free memory was 55.8 MB in the beginning and 54.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:55,099 INFO L168 Benchmark]: Boogie Preprocessor took 48.94 ms. Allocated memory is still 71.3 MB. Free memory was 54.4 MB in the beginning and 53.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:10:55,100 INFO L168 Benchmark]: RCFGBuilder took 1070.64 ms. Allocated memory is still 71.3 MB. Free memory was 52.9 MB in the beginning and 42.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:55,109 INFO L168 Benchmark]: TraceAbstraction took 469245.61 ms. Allocated memory was 71.3 MB in the beginning and 94.4 MB in the end (delta: 23.1 MB). Free memory was 42.2 MB in the beginning and 40.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:55,109 INFO L168 Benchmark]: Witness Printer took 90.48 ms. Allocated memory is still 94.4 MB. Free memory was 40.1 MB in the beginning and 36.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:10:55,112 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 71.3 MB. Free memory is still 53.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 252.58 ms. Allocated memory is still 71.3 MB. Free memory was 55.6 MB in the beginning and 55.8 MB in the end (delta: -210.7 kB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.26 ms. Allocated memory is still 71.3 MB. Free memory was 55.8 MB in the beginning and 54.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.94 ms. Allocated memory is still 71.3 MB. Free memory was 54.4 MB in the beginning and 53.2 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1070.64 ms. Allocated memory is still 71.3 MB. Free memory was 52.9 MB in the beginning and 42.8 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 469245.61 ms. Allocated memory was 71.3 MB in the beginning and 94.4 MB in the end (delta: 23.1 MB). Free memory was 42.2 MB in the beginning and 40.1 MB in the end (delta: 2.2 MB). Peak memory consumption was 27.9 MB. Max. memory is 16.1 GB. * Witness Printer took 90.48 ms. Allocated memory is still 94.4 MB. Free memory was 40.1 MB in the beginning and 36.9 MB in the end (delta: 3.2 MB). Peak memory consumption was 2.1 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: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L17] int counter = 0; VAL [counter=0] [L19] short k; [L20] long long y, x, c; [L21] k = __VERIFIER_nondet_short() [L7] COND FALSE !(!cond) VAL [counter=0] [L24] y = 0 [L25] x = 0 [L26] c = 0 VAL [counter=0] [L28] EXPR counter++ VAL [counter=1] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=1] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=1] [L28] EXPR counter++ VAL [counter=2] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=2] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=2] [L28] EXPR counter++ VAL [counter=3] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=3] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=3] [L28] EXPR counter++ VAL [counter=4] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=4] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=4] [L28] EXPR counter++ VAL [counter=5] [L28] COND TRUE counter++<5 [L10] COND FALSE !(!(cond)) VAL [counter=5] [L31] COND FALSE !(!(c < k)) [L34] c = c + 1 [L35] y = y + 1 [L36] x = y * y * y * y + x VAL [counter=5] [L28] EXPR counter++ VAL [counter=6] [L28] COND FALSE !(counter++<5) [L10] COND FALSE !(!(cond)) VAL [counter=6] [L10] COND TRUE !(cond) VAL [counter=6] [L12] reach_error() VAL [counter=6] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 22 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 469130.3ms, OverallIterations: 8, TraceHistogramMax: 6, EmptinessCheckTime: 14.4ms, AutomataDifference: 267248.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 8.8ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 117 SDtfs, 464 SDslu, 473 SDs, 0 SdLazy, 444 SolverSat, 297 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 56312.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 697 GetRequests, 556 SyntacticMatches, 10 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 275887.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, InterpolantAutomatonStates: 100, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 86.6ms AutomataMinimizationTime, 7 MinimizatonAttempts, 75 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 144.0ms SsaConstructionTime, 17894.0ms SatisfiabilityAnalysisTime, 175451.6ms InterpolantComputationTime, 359 NumberOfCodeBlocks, 359 NumberOfCodeBlocksAsserted, 29 NumberOfCheckSat, 622 ConstructedInterpolants, 4 QuantifiedInterpolants, 8634 SizeOfPredicates, 69 NumberOfNonLiveVariables, 1030 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 34 InterpolantComputations, 4 PerfectInterpolantSequences, 25/528 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 08:10:55,240 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_af139905-5a2f-43b9-b6ff-2222bd86237a/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...