./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_4.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_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/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_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/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_3fe615ac-874d-4ead-8679-5995a597aa51/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 1f0612232c1c27f632e5ebc1ac9944571433fe3b .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/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_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/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_3fe615ac-874d-4ead-8679-5995a597aa51/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 1f0612232c1c27f632e5ebc1ac9944571433fe3b .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:14:05,217 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:14:05,220 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:14:05,283 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:14:05,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:14:05,285 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:14:05,288 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:14:05,290 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:14:05,293 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:14:05,298 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:14:05,300 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:14:05,304 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:14:05,304 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:14:05,312 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:14:05,315 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:14:05,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:14:05,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:14:05,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:14:05,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:14:05,334 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:14:05,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:14:05,340 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:14:05,342 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:14:05,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:14:05,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:14:05,348 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:14:05,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:14:05,350 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:14:05,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:14:05,352 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:14:05,353 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:14:05,354 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:14:05,355 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:14:05,357 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:14:05,358 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:14:05,358 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:14:05,359 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:14:05,360 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:14:05,360 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:14:05,361 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:14:05,362 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:14:05,363 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:14:05,397 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:14:05,397 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:14:05,398 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:14:05,399 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:14:05,399 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:14:05,399 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:14:05,399 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:14:05,400 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:14:05,400 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:14:05,400 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:14:05,400 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:14:05,401 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:14:05,401 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:14:05,401 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:14:05,402 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:14:05,403 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:14:05,403 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:14:05,403 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:14:05,403 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:14:05,404 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:14:05,404 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:14:05,404 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:14:05,404 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:14:05,405 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:14:05,405 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:14:05,405 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:14:05,405 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:14:05,406 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:14:05,406 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:14:05,406 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:14:05,406 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:05,407 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:14:05,407 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:14:05,407 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:14:05,418 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:14:05,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:14:05,419 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:14:05,419 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:14:05,419 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:14:05,420 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_3fe615ac-874d-4ead-8679-5995a597aa51/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f0612232c1c27f632e5ebc1ac9944571433fe3b [2021-10-13 07:14:05,790 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:14:05,817 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:14:05,820 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:14:05,822 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:14:05,823 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:14:05,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-simple/nested_4.c [2021-10-13 07:14:05,904 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data/2284449ba/b5ababc997b742f5b502d76b2fd03fb0/FLAGf6b62cce2 [2021-10-13 07:14:06,453 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:14:06,453 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/sv-benchmarks/c/loop-simple/nested_4.c [2021-10-13 07:14:06,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data/2284449ba/b5ababc997b742f5b502d76b2fd03fb0/FLAGf6b62cce2 [2021-10-13 07:14:06,806 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data/2284449ba/b5ababc997b742f5b502d76b2fd03fb0 [2021-10-13 07:14:06,810 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:14:06,812 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:14:06,814 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:06,814 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:14:06,819 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:14:06,820 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:06" (1/1) ... [2021-10-13 07:14:06,821 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49c9c076 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:06, skipping insertion in model container [2021-10-13 07:14:06,822 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:06" (1/1) ... [2021-10-13 07:14:06,831 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:14:06,847 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:14:07,077 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_3fe615ac-874d-4ead-8679-5995a597aa51/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-13 07:14:07,082 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:07,100 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:14:07,116 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_3fe615ac-874d-4ead-8679-5995a597aa51/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-13 07:14:07,117 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:07,131 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:14:07,132 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07 WrapperNode [2021-10-13 07:14:07,132 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:07,133 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:07,134 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:14:07,134 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:14:07,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,183 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:07,184 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:14:07,184 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:14:07,184 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:14:07,198 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,200 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,210 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:14:07,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:14:07,225 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:14:07,225 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:14:07,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (1/1) ... [2021-10-13 07:14:07,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:07,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:07,275 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:14:07,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:14:07,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:14:07,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:14:07,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:14:07,328 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:14:07,613 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:14:07,614 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:14:07,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:07 BoogieIcfgContainer [2021-10-13 07:14:07,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:14:07,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:14:07,620 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:14:07,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:14:07,624 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:14:06" (1/3) ... [2021-10-13 07:14:07,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d7a5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:07, skipping insertion in model container [2021-10-13 07:14:07,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:07" (2/3) ... [2021-10-13 07:14:07,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d7a5b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:07, skipping insertion in model container [2021-10-13 07:14:07,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:07" (3/3) ... [2021-10-13 07:14:07,628 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2021-10-13 07:14:07,635 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:14:07,636 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:14:07,695 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:14:07,704 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 07:14:07,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:14:07,721 INFO L276 IsEmpty]: Start isEmpty. Operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:07,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:14:07,727 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:07,728 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:14:07,728 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:07,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:07,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2960648, now seen corresponding path program 1 times [2021-10-13 07:14:07,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:14:07,749 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989016291] [2021-10-13 07:14:07,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:07,750 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:14:07,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:08,058 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 07:14:08,059 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:14:08,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989016291] [2021-10-13 07:14:08,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989016291] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:08,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:08,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:14:08,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147336939] [2021-10-13 07:14:08,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:14:08,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:14:08,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:14:08,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:14:08,089 INFO L87 Difference]: Start difference. First operand has 10 states, 8 states have (on average 1.75) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:08,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:08,125 INFO L93 Difference]: Finished difference Result 19 states and 27 transitions. [2021-10-13 07:14:08,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:14:08,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 4 [2021-10-13 07:14:08,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:08,136 INFO L225 Difference]: With dead ends: 19 [2021-10-13 07:14:08,136 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:14:08,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:14:08,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:14:08,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 9. [2021-10-13 07:14:08,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:08,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 12 transitions. [2021-10-13 07:14:08,194 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 12 transitions. Word has length 4 [2021-10-13 07:14:08,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:08,194 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 12 transitions. [2021-10-13 07:14:08,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 2 states have internal predecessors, (4), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:08,195 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 12 transitions. [2021-10-13 07:14:08,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 07:14:08,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:08,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 07:14:08,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:14:08,197 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:08,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:08,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1506518357, now seen corresponding path program 1 times [2021-10-13 07:14:08,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:14:08,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297161760] [2021-10-13 07:14:08,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:08,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:14:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:08,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:08,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:14:08,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297161760] [2021-10-13 07:14:08,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297161760] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:08,325 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:08,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:14:08,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155678809] [2021-10-13 07:14:08,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:14:08,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:14:08,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:14:08,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:14:08,330 INFO L87 Difference]: Start difference. First operand 9 states and 12 transitions. Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 07:14:08,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:08,360 INFO L93 Difference]: Finished difference Result 19 states and 28 transitions. [2021-10-13 07:14:08,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:14:08,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-10-13 07:14:08,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:08,362 INFO L225 Difference]: With dead ends: 19 [2021-10-13 07:14:08,363 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:14:08,364 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:14:08,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:14:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 10. [2021-10-13 07:14:08,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 13 transitions. [2021-10-13 07:14:08,368 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 13 transitions. Word has length 6 [2021-10-13 07:14:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:08,369 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 13 transitions. [2021-10-13 07:14:08,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 07:14:08,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 13 transitions. [2021-10-13 07:14:08,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 07:14:08,370 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:08,371 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:08,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:14:08,372 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:08,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:08,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1875135773, now seen corresponding path program 1 times [2021-10-13 07:14:08,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:14:08,374 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204747865] [2021-10-13 07:14:08,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:08,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:14:08,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:08,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:08,468 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:14:08,469 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204747865] [2021-10-13 07:14:08,469 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204747865] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:08,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:08,470 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:14:08,470 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050781601] [2021-10-13 07:14:08,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:14:08,474 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:14:08,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:14:08,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:14:08,476 INFO L87 Difference]: Start difference. First operand 10 states and 13 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 07:14:08,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:08,501 INFO L93 Difference]: Finished difference Result 20 states and 28 transitions. [2021-10-13 07:14:08,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:14:08,502 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 07:14:08,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:08,503 INFO L225 Difference]: With dead ends: 20 [2021-10-13 07:14:08,503 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:14:08,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:14:08,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:14:08,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-10-13 07:14:08,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:08,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 14 transitions. [2021-10-13 07:14:08,509 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 14 transitions. Word has length 8 [2021-10-13 07:14:08,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:08,509 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 14 transitions. [2021-10-13 07:14:08,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 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 07:14:08,510 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 14 transitions. [2021-10-13 07:14:08,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 07:14:08,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:08,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:08,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:14:08,512 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash -2119571304, now seen corresponding path program 1 times [2021-10-13 07:14:08,513 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:14:08,514 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265735575] [2021-10-13 07:14:08,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:08,515 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:14:08,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:08,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:08,594 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:14:08,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265735575] [2021-10-13 07:14:08,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265735575] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:08,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:08,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 07:14:08,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84266365] [2021-10-13 07:14:08,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:14:08,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:14:08,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:14:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:14:08,608 INFO L87 Difference]: Start difference. First operand 11 states and 14 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:08,633 INFO L93 Difference]: Finished difference Result 21 states and 28 transitions. [2021-10-13 07:14:08,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:14:08,634 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-13 07:14:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:08,635 INFO L225 Difference]: With dead ends: 21 [2021-10-13 07:14:08,635 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 07:14:08,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:14:08,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 07:14:08,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-13 07:14:08,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:08,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 15 transitions. [2021-10-13 07:14:08,647 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 15 transitions. Word has length 10 [2021-10-13 07:14:08,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:08,647 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 15 transitions. [2021-10-13 07:14:08,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 15 transitions. [2021-10-13 07:14:08,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:14:08,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:08,649 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:08,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-13 07:14:08,649 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:08,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:08,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1565139754, now seen corresponding path program 1 times [2021-10-13 07:14:08,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:14:08,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534348913] [2021-10-13 07:14:08,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:08,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:14:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:08,713 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:08,713 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:14:08,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534348913] [2021-10-13 07:14:08,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534348913] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:14:08,714 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276840041] [2021-10-13 07:14:08,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:08,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:08,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:08,717 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:14:08,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:14:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:08,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:14:08,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:08,863 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:08,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276840041] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:08,952 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1892469861] [2021-10-13 07:14:08,980 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2021-10-13 07:14:08,981 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:14:08,988 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:14:08,998 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:14:08,998 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:14:09,064 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:09,071 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:14:09,072 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:09,072 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:14:09,078 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:14:09,080 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:09,082 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:14:09,101 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 131 [2021-10-13 07:14:09,145 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:09,151 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:09,153 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:09,225 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-13 07:14:09,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-13 07:14:09,229 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:09,237 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:14:09,240 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:09,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-13 07:14:09,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:14:09,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:14:09,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:09,327 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:09,332 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 112 [2021-10-13 07:14:09,348 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:14:09,349 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:128, output treesize:112 [2021-10-13 07:14:09,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:09,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:09,578 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_9| 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 07:14:09,582 INFO L168 Benchmark]: Toolchain (without parser) took 2770.10 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 43.4 MB in the beginning and 81.4 MB in the end (delta: -38.0 MB). Peak memory consumption was 29.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:09,583 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 59.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:14:09,584 INFO L168 Benchmark]: CACSL2BoogieTranslator took 318.43 ms. Allocated memory is still 86.0 MB. Free memory was 43.2 MB in the beginning and 57.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:09,584 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.85 ms. Allocated memory is still 86.0 MB. Free memory was 57.0 MB in the beginning and 55.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:14:09,585 INFO L168 Benchmark]: Boogie Preprocessor took 39.54 ms. Allocated memory is still 86.0 MB. Free memory was 55.5 MB in the beginning and 54.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:14:09,586 INFO L168 Benchmark]: RCFGBuilder took 393.05 ms. Allocated memory is still 86.0 MB. Free memory was 54.5 MB in the beginning and 43.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:09,586 INFO L168 Benchmark]: TraceAbstraction took 1961.62 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 43.1 MB in the beginning and 81.4 MB in the end (delta: -38.3 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:09,590 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 86.0 MB. Free memory is still 59.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 318.43 ms. Allocated memory is still 86.0 MB. Free memory was 43.2 MB in the beginning and 57.0 MB in the end (delta: -13.8 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.85 ms. Allocated memory is still 86.0 MB. Free memory was 57.0 MB in the beginning and 55.5 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.54 ms. Allocated memory is still 86.0 MB. Free memory was 55.5 MB in the beginning and 54.5 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 393.05 ms. Allocated memory is still 86.0 MB. Free memory was 54.5 MB in the beginning and 43.6 MB in the end (delta: 10.9 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1961.62 ms. Allocated memory was 86.0 MB in the beginning and 104.9 MB in the end (delta: 18.9 MB). Free memory was 43.1 MB in the beginning and 81.4 MB in the end (delta: -38.3 MB). Peak memory consumption was 30.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_9| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_9|: 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 07:14:09,639 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/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 07:14:12,559 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:14:12,562 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:14:12,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:14:12,618 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:14:12,623 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:14:12,625 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:14:12,631 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:14:12,635 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:14:12,645 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:14:12,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:14:12,649 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:14:12,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:14:12,653 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:14:12,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:14:12,661 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:14:12,663 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:14:12,664 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:14:12,687 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:14:12,696 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:14:12,699 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:14:12,701 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:14:12,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:14:12,706 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:14:12,718 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:14:12,718 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:14:12,719 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:14:12,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:14:12,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:14:12,723 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:14:12,724 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:14:12,725 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:14:12,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:14:12,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:14:12,730 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:14:12,730 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:14:12,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:14:12,732 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:14:12,732 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:14:12,734 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:14:12,735 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:14:12,736 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:14:12,792 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:14:12,792 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:14:12,794 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:14:12,794 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:14:12,794 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:14:12,795 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:14:12,795 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:14:12,795 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:14:12,795 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:14:12,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:14:12,798 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:14:12,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:14:12,799 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:14:12,799 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:14:12,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:14:12,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:14:12,800 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:14:12,800 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:14:12,800 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:14:12,800 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:14:12,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:14:12,801 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:14:12,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:14:12,801 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:14:12,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:14:12,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:14:12,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:12,802 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:14:12,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:14:12,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:14:12,803 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:14:12,803 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:12,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:14:12,804 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:14:12,805 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:14:12,805 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_3fe615ac-874d-4ead-8679-5995a597aa51/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1f0612232c1c27f632e5ebc1ac9944571433fe3b [2021-10-13 07:14:13,287 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:14:13,313 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:14:13,316 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:14:13,318 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:14:13,318 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:14:13,320 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/loop-simple/nested_4.c [2021-10-13 07:14:13,402 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data/783e85ee3/3c2ca36d0e19453181473a52700e94ce/FLAG23b32a2c9 [2021-10-13 07:14:13,995 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:14:13,996 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/sv-benchmarks/c/loop-simple/nested_4.c [2021-10-13 07:14:14,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data/783e85ee3/3c2ca36d0e19453181473a52700e94ce/FLAG23b32a2c9 [2021-10-13 07:14:14,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/data/783e85ee3/3c2ca36d0e19453181473a52700e94ce [2021-10-13 07:14:14,360 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:14:14,362 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:14:14,363 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:14,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:14:14,373 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:14:14,374 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,377 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1dea7114 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14, skipping insertion in model container [2021-10-13 07:14:14,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,387 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:14:14,404 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:14:14,626 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_3fe615ac-874d-4ead-8679-5995a597aa51/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-13 07:14:14,638 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:14,658 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:14:14,683 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_3fe615ac-874d-4ead-8679-5995a597aa51/sv-benchmarks/c/loop-simple/nested_4.c[841,854] [2021-10-13 07:14:14,685 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:14,703 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:14:14,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14 WrapperNode [2021-10-13 07:14:14,704 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:14,708 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:14,708 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:14:14,708 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:14:14,717 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,728 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,773 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:14,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:14:14,775 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:14:14,775 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:14:14,785 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,785 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,825 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,830 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,831 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,837 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:14:14,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:14:14,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:14:14,840 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:14:14,841 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (1/1) ... [2021-10-13 07:14:14,849 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:14,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:14,878 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:14:14,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:14:14,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:14:14,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:14:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:14:14,946 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:14:15,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:14:15,312 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-13 07:14:15,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:15 BoogieIcfgContainer [2021-10-13 07:14:15,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:14:15,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:14:15,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:14:15,320 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:14:15,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:14:14" (1/3) ... [2021-10-13 07:14:15,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e29cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:15, skipping insertion in model container [2021-10-13 07:14:15,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:14" (2/3) ... [2021-10-13 07:14:15,338 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@29e29cf6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:15, skipping insertion in model container [2021-10-13 07:14:15,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:15" (3/3) ... [2021-10-13 07:14:15,340 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_4.c [2021-10-13 07:14:15,346 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:14:15,347 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 07:14:15,439 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:14:15,448 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 07:14:15,449 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 07:14:15,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 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 07:14:15,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:14:15,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:15,472 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:14:15,473 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:15,481 INFO L82 PathProgramCache]: Analyzing trace with hash 28738512, now seen corresponding path program 1 times [2021-10-13 07:14:15,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:15,494 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [392327529] [2021-10-13 07:14:15,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:15,495 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:15,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:15,500 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:15,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:14:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:15,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:14:15,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:15,647 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 07:14:15,648 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:15,686 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 07:14:15,687 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:15,687 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [392327529] [2021-10-13 07:14:15,688 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [392327529] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:15,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:15,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:14:15,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306105857] [2021-10-13 07:14:15,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:14:15,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:15,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:14:15,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:14:15,730 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 16 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) 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 07:14:15,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:15,768 INFO L93 Difference]: Finished difference Result 32 states and 48 transitions. [2021-10-13 07:14:15,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:14:15,770 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 07:14:15,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:15,779 INFO L225 Difference]: With dead ends: 32 [2021-10-13 07:14:15,779 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 07:14:15,782 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 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 07:14:15,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 07:14:15,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 07:14:15,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 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 07:14:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 16 transitions. [2021-10-13 07:14:15,820 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 16 transitions. Word has length 5 [2021-10-13 07:14:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:15,820 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 16 transitions. [2021-10-13 07:14:15,821 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 07:14:15,821 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 16 transitions. [2021-10-13 07:14:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 07:14:15,822 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:15,822 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 07:14:15,848 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:16,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:16,050 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:16,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:16,055 INFO L82 PathProgramCache]: Analyzing trace with hash 28698150, now seen corresponding path program 1 times [2021-10-13 07:14:16,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:16,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1261502193] [2021-10-13 07:14:16,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:16,057 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:16,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:16,059 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:16,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:14:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:16,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:14:16,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:16,177 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 07:14:16,178 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:16,203 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 07:14:16,203 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:16,204 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1261502193] [2021-10-13 07:14:16,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1261502193] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:16,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:16,205 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:14:16,205 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869487195] [2021-10-13 07:14:16,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:14:16,206 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:16,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:14:16,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:16,208 INFO L87 Difference]: Start difference. First operand 13 states and 16 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:16,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:16,237 INFO L93 Difference]: Finished difference Result 25 states and 32 transitions. [2021-10-13 07:14:16,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:14:16,238 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-13 07:14:16,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:16,239 INFO L225 Difference]: With dead ends: 25 [2021-10-13 07:14:16,239 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 07:14:16,240 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:16,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 07:14:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-13 07:14:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) 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 07:14:16,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2021-10-13 07:14:16,248 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 5 [2021-10-13 07:14:16,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:16,248 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2021-10-13 07:14:16,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:16,249 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2021-10-13 07:14:16,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 07:14:16,250 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:16,250 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:14:16,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:16,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:16,462 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash 909552806, now seen corresponding path program 1 times [2021-10-13 07:14:16,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:16,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1346004157] [2021-10-13 07:14:16,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:16,466 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:16,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:16,473 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:16,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:14:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:16,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:14:16,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:16,652 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:14:16,652 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:16,724 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-13 07:14:16,724 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:16,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1346004157] [2021-10-13 07:14:16,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1346004157] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:16,725 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:16,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:14:16,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201952318] [2021-10-13 07:14:16,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:14:16,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:16,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:14:16,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:16,728 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 07:14:16,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:16,791 INFO L93 Difference]: Finished difference Result 49 states and 66 transitions. [2021-10-13 07:14:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:14:16,792 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 11 [2021-10-13 07:14:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:16,794 INFO L225 Difference]: With dead ends: 49 [2021-10-13 07:14:16,794 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 07:14:16,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:16,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 07:14:16,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-13 07:14:16,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 35 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 07:14:16,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 46 transitions. [2021-10-13 07:14:16,808 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 46 transitions. Word has length 11 [2021-10-13 07:14:16,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:16,808 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 46 transitions. [2021-10-13 07:14:16,809 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 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 07:14:16,809 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 46 transitions. [2021-10-13 07:14:16,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 07:14:16,810 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:16,811 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:14:16,829 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:17,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:17,025 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:17,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:17,026 INFO L82 PathProgramCache]: Analyzing trace with hash -1302836826, now seen corresponding path program 1 times [2021-10-13 07:14:17,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:17,027 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [291999229] [2021-10-13 07:14:17,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:17,027 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:17,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:17,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:17,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 07:14:17,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:17,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:14:17,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:17,198 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:14:17,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:17,284 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 07:14:17,284 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:17,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [291999229] [2021-10-13 07:14:17,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [291999229] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:17,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:17,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:14:17,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075675572] [2021-10-13 07:14:17,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:14:17,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:17,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:14:17,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:17,288 INFO L87 Difference]: Start difference. First operand 36 states and 46 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 07:14:17,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:17,343 INFO L93 Difference]: Finished difference Result 84 states and 114 transitions. [2021-10-13 07:14:17,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:14:17,344 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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) Word has length 23 [2021-10-13 07:14:17,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:17,346 INFO L225 Difference]: With dead ends: 84 [2021-10-13 07:14:17,346 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 07:14:17,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:17,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 07:14:17,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-13 07:14:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 55 states have internal predecessors, (70), 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 07:14:17,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2021-10-13 07:14:17,384 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 23 [2021-10-13 07:14:17,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:17,390 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2021-10-13 07:14:17,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 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 07:14:17,391 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2021-10-13 07:14:17,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 07:14:17,396 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:17,397 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:14:17,426 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:17,610 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:17,610 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:17,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:17,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1512424358, now seen corresponding path program 1 times [2021-10-13 07:14:17,612 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:17,613 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [555178487] [2021-10-13 07:14:17,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:17,613 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:17,616 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:17,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-13 07:14:17,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:17,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:14:17,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:17,906 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-10-13 07:14:17,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-10-13 07:14:18,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:18,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [555178487] [2021-10-13 07:14:18,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [555178487] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:18,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:18,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:14:18,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611382968] [2021-10-13 07:14:18,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:14:18,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:18,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:14:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:18,064 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 07:14:18,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:18,108 INFO L93 Difference]: Finished difference Result 129 states and 172 transitions. [2021-10-13 07:14:18,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:14:18,109 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-13 07:14:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:18,111 INFO L225 Difference]: With dead ends: 129 [2021-10-13 07:14:18,117 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 07:14:18,118 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:14:18,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 07:14:18,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-13 07:14:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 79 states have internal predecessors, (94), 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 07:14:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2021-10-13 07:14:18,146 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 47 [2021-10-13 07:14:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:18,146 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2021-10-13 07:14:18,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 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 07:14:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2021-10-13 07:14:18,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-13 07:14:18,160 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:18,161 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 8, 8, 8, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1] [2021-10-13 07:14:18,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-10-13 07:14:18,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:18,366 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:18,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1196145574, now seen corresponding path program 1 times [2021-10-13 07:14:18,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:18,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [826156454] [2021-10-13 07:14:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:18,368 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:18,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:18,374 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:18,390 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:14:18,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:18,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:18,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-10-13 07:14:18,872 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-10-13 07:14:19,229 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:19,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [826156454] [2021-10-13 07:14:19,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [826156454] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:19,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787444811] [2021-10-13 07:14:19,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:19,230 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:19,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:14:19,243 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:14:19,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:14:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:19,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:19,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:19,897 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-10-13 07:14:19,898 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:20,156 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 109 proven. 4 refuted. 0 times theorem prover too weak. 402 trivial. 0 not checked. [2021-10-13 07:14:20,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1787444811] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:20,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280784819] [2021-10-13 07:14:20,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:20,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:20,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:20,163 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:14:20,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:14:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:20,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:20,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:20,791 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-10-13 07:14:20,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:21,294 INFO L134 CoverageAnalysis]: Checked inductivity of 515 backedges. 0 proven. 277 refuted. 0 times theorem prover too weak. 238 trivial. 0 not checked. [2021-10-13 07:14:21,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280784819] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:21,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:14:21,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-10-13 07:14:21,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731298281] [2021-10-13 07:14:21,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:14:21,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:21,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:14:21,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:14:21,300 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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 07:14:23,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:23,000 INFO L93 Difference]: Finished difference Result 490 states and 645 transitions. [2021-10-13 07:14:23,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 07:14:23,001 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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 79 [2021-10-13 07:14:23,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:23,011 INFO L225 Difference]: With dead ends: 490 [2021-10-13 07:14:23,017 INFO L226 Difference]: Without dead ends: 420 [2021-10-13 07:14:23,022 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1438.1ms TimeCoverageRelationStatistics Valid=689, Invalid=1963, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 07:14:23,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2021-10-13 07:14:23,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 420. [2021-10-13 07:14:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 1.1026252983293556) internal successors, (462), 419 states have internal predecessors, (462), 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 07:14:23,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 462 transitions. [2021-10-13 07:14:23,097 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 462 transitions. Word has length 79 [2021-10-13 07:14:23,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:23,098 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 462 transitions. [2021-10-13 07:14:23,098 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.571428571428571) internal successors, (78), 14 states have internal predecessors, (78), 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 07:14:23,098 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 462 transitions. [2021-10-13 07:14:23,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2021-10-13 07:14:23,112 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:23,113 INFO L512 BasicCegarLoop]: trace histogram [144, 144, 24, 24, 24, 12, 12, 12, 6, 6, 6, 1, 1, 1, 1, 1] [2021-10-13 07:14:23,130 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:23,353 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:23,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:23,730 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:23,745 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:23,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:23,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1285592742, now seen corresponding path program 2 times [2021-10-13 07:14:23,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:23,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [787602842] [2021-10-13 07:14:23,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:14:23,748 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:23,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:23,761 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:23,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:14:24,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:14:24,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:14:24,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:24,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:25,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25485 backedges. 3906 proven. 89 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2021-10-13 07:14:25,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 25485 backedges. 3906 proven. 89 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2021-10-13 07:14:26,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:26,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [787602842] [2021-10-13 07:14:26,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [787602842] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:26,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [22625691] [2021-10-13 07:14:26,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:14:26,646 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:26,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:14:26,650 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:14:26,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:14:28,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:14:28,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:14:28,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:28,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 25485 backedges. 3906 proven. 89 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2021-10-13 07:14:29,387 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:30,699 INFO L134 CoverageAnalysis]: Checked inductivity of 25485 backedges. 3906 proven. 89 refuted. 0 times theorem prover too weak. 21490 trivial. 0 not checked. [2021-10-13 07:14:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [22625691] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:30,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683276907] [2021-10-13 07:14:30,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:14:30,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:30,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:30,726 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:14:30,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:14:31,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:14:31,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:14:31,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:14:31,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:32,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25485 backedges. 7131 proven. 357 refuted. 0 times theorem prover too weak. 17997 trivial. 0 not checked. [2021-10-13 07:14:32,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:34,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25485 backedges. 7131 proven. 357 refuted. 0 times theorem prover too weak. 17997 trivial. 0 not checked. [2021-10-13 07:14:34,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683276907] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:34,223 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:14:34,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 14 [2021-10-13 07:14:34,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276562599] [2021-10-13 07:14:34,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 07:14:34,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 07:14:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-13 07:14:34,229 INFO L87 Difference]: Start difference. First operand 420 states and 462 transitions. Second operand has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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 07:14:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:35,978 INFO L93 Difference]: Finished difference Result 3757 states and 4222 transitions. [2021-10-13 07:14:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 07:14:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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 419 [2021-10-13 07:14:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:36,003 INFO L225 Difference]: With dead ends: 3757 [2021-10-13 07:14:36,003 INFO L226 Difference]: Without dead ends: 3372 [2021-10-13 07:14:36,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2546 GetRequests, 2496 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 1272.7ms TimeCoverageRelationStatistics Valid=689, Invalid=1963, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 07:14:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3372 states. [2021-10-13 07:14:36,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3372 to 3372. [2021-10-13 07:14:36,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 1.0768318006526254) internal successors, (3630), 3371 states have internal predecessors, (3630), 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 07:14:36,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 3630 transitions. [2021-10-13 07:14:36,393 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 3630 transitions. Word has length 419 [2021-10-13 07:14:36,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:36,397 INFO L470 AbstractCegarLoop]: Abstraction has 3372 states and 3630 transitions. [2021-10-13 07:14:36,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 5.5) internal successors, (77), 14 states have internal predecessors, (77), 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 07:14:36,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 3630 transitions. [2021-10-13 07:14:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3372 [2021-10-13 07:14:36,619 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:36,621 INFO L512 BasicCegarLoop]: trace histogram [1296, 1296, 216, 216, 216, 36, 36, 36, 6, 6, 6, 1, 1, 1, 1, 1] [2021-10-13 07:14:36,629 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:36,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:37,054 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:37,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:37,222 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:37,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:37,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1295502170, now seen corresponding path program 3 times [2021-10-13 07:14:37,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:37,232 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1048454958] [2021-10-13 07:14:37,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:14:37,233 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:37,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:37,235 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:37,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:14:43,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2021-10-13 07:14:43,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:14:44,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 07:14:44,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2037849 backedges. 566983 proven. 47211 refuted. 0 times theorem prover too weak. 1423655 trivial. 0 not checked. [2021-10-13 07:14:56,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:17,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2037849 backedges. 566536 proven. 47658 refuted. 0 times theorem prover too weak. 1423655 trivial. 0 not checked. [2021-10-13 07:15:17,272 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:17,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1048454958] [2021-10-13 07:15:17,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1048454958] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:17,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [224764363] [2021-10-13 07:15:17,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:15:17,273 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:15:17,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:15:17,274 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:15:17,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 07:15:24,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2021-10-13 07:15:24,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:15:24,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 07:15:25,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:35,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2037849 backedges. 582283 proven. 1311 refuted. 0 times theorem prover too weak. 1454255 trivial. 0 not checked. [2021-10-13 07:15:35,409 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:49,535 INFO L134 CoverageAnalysis]: Checked inductivity of 2037849 backedges. 566536 proven. 17058 refuted. 0 times theorem prover too weak. 1454255 trivial. 0 not checked. [2021-10-13 07:15:49,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [224764363] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:49,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745430216] [2021-10-13 07:15:49,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:15:49,536 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:49,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:49,537 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:15:49,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 07:15:59,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 189 check-sat command(s) [2021-10-13 07:15:59,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:15:59,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 742 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 07:15:59,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:10,597 INFO L134 CoverageAnalysis]: Checked inductivity of 2037849 backedges. 566536 proven. 48558 refuted. 0 times theorem prover too weak. 1422755 trivial. 0 not checked. [2021-10-13 07:16:10,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2037849 backedges. 566536 proven. 48558 refuted. 0 times theorem prover too weak. 1422755 trivial. 0 not checked. [2021-10-13 07:16:31,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745430216] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:31,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:16:31,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19, 17, 17, 25, 29] total 84 [2021-10-13 07:16:31,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614264118] [2021-10-13 07:16:31,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-10-13 07:16:31,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:31,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-10-13 07:16:31,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1391, Invalid=5581, Unknown=0, NotChecked=0, Total=6972 [2021-10-13 07:16:31,748 INFO L87 Difference]: Start difference. First operand 3372 states and 3630 transitions. Second operand has 84 states, 84 states have (on average 4.071428571428571) internal successors, (342), 84 states have internal predecessors, (342), 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 07:16:50,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:50,903 INFO L93 Difference]: Finished difference Result 6662 states and 7174 transitions. [2021-10-13 07:16:50,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2021-10-13 07:16:50,904 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 4.071428571428571) internal successors, (342), 84 states have internal predecessors, (342), 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 3371 [2021-10-13 07:16:50,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:50,913 INFO L225 Difference]: With dead ends: 6662 [2021-10-13 07:16:50,913 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:16:50,948 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20371 GetRequests, 20133 SyntacticMatches, 5 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17836 ImplicationChecksByTransitivity, 22294.9ms TimeCoverageRelationStatistics Valid=8394, Invalid=46596, Unknown=0, NotChecked=0, Total=54990 [2021-10-13 07:16:50,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:16:50,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:16:50,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 07:16:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:16:50,949 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 3371 [2021-10-13 07:16:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:50,951 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:16:50,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 4.071428571428571) internal successors, (342), 84 states have internal predecessors, (342), 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 07:16:50,952 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:16:50,952 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:16:50,955 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:16:50,985 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-10-13 07:16:51,196 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Ended with exit code 0 [2021-10-13 07:16:51,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:51,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:16:51,585 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:16:51,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:16:51,630 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:16:55,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:16:55,880 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:16:55,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:16:58,757 INFO L857 garLoopResultBuilder]: For program point L31-1(lines 31 33) no Hoare annotation was computed. [2021-10-13 07:16:58,758 INFO L857 garLoopResultBuilder]: For program point L23-2(lines 23 29) no Hoare annotation was computed. [2021-10-13 07:16:58,758 INFO L853 garLoopResultBuilder]: At program point L23-3(lines 23 29) the Hoare annotation is: (let ((.cse5 (= (_ bv6 32) ULTIMATE.start_main_~c~0)) (.cse0 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv6 32))) (.cse1 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~d~0) (_ bv6 32))) (.cse2 (bvslt ULTIMATE.start_main_~a~0 (_ bv6 32))) (.cse3 (not (bvslt ULTIMATE.start_main_~d~0 (_ bv6 32)))) (.cse4 (not (bvslt ULTIMATE.start_main_~c~0 (_ bv6 32))))) (or (and (= ULTIMATE.start_main_~b~0 (_ bv5 32)) .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse5 (= (_ bv3 32) ULTIMATE.start_main_~b~0) .cse1 .cse2 .cse3) (and (= (_ bv4 32) ULTIMATE.start_main_~b~0) .cse5 .cse1 .cse2 .cse3) (and (= (_ bv2 32) ULTIMATE.start_main_~b~0) .cse5 .cse1 .cse2 .cse3) (and (= ULTIMATE.start_main_~b~0 (_ bv1 32)) .cse5 .cse1 .cse2 .cse3) (and (= ULTIMATE.start_main_~b~0 (_ bv0 32)) .cse5 .cse1 .cse2 .cse3) (and .cse0 .cse1 .cse2 (= (_ bv6 32) ULTIMATE.start_main_~b~0) .cse3 .cse4))) [2021-10-13 07:16:58,759 INFO L857 garLoopResultBuilder]: For program point L32(line 32) no Hoare annotation was computed. [2021-10-13 07:16:58,759 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:16:58,759 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:16:58,759 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:16:58,759 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 32) no Hoare annotation was computed. [2021-10-13 07:16:58,760 INFO L857 garLoopResultBuilder]: For program point L24-2(lines 24 28) no Hoare annotation was computed. [2021-10-13 07:16:58,760 INFO L853 garLoopResultBuilder]: At program point L24-3(lines 24 28) the Hoare annotation is: (let ((.cse6 (= (_ bv3 32) ULTIMATE.start_main_~b~0)) (.cse9 (= (_ bv2 32) ULTIMATE.start_main_~c~0)) (.cse11 (= (_ bv3 32) ULTIMATE.start_main_~c~0)) (.cse12 (= ULTIMATE.start_main_~b~0 (_ bv1 32))) (.cse0 (= (_ bv4 32) ULTIMATE.start_main_~c~0)) (.cse7 (= (_ bv4 32) ULTIMATE.start_main_~b~0)) (.cse8 (= ULTIMATE.start_main_~c~0 (_ bv1 32))) (.cse10 (= (_ bv2 32) ULTIMATE.start_main_~b~0)) (.cse15 (= ULTIMATE.start_main_~c~0 (_ bv5 32))) (.cse14 (= ULTIMATE.start_main_~b~0 (_ bv0 32))) (.cse5 (= (_ bv6 32) ULTIMATE.start_main_~c~0)) (.cse1 (= ULTIMATE.start_main_~b~0 (_ bv5 32))) (.cse2 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~d~0) (_ bv6 32))) (.cse3 (bvslt ULTIMATE.start_main_~a~0 (_ bv6 32))) (.cse4 (not (bvslt ULTIMATE.start_main_~d~0 (_ bv6 32)))) (.cse13 (= ULTIMATE.start_main_~c~0 (_ bv0 32)))) (or (and .cse0 .cse1 .cse2 .cse3 .cse4) (and .cse1 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv6 32)) .cse2 .cse3 .cse4 (not (bvslt ULTIMATE.start_main_~c~0 (_ bv6 32)))) (and .cse5 .cse6 .cse2 .cse3 .cse4) (and .cse7 .cse8 .cse3) (and .cse9 .cse6 .cse3) (and .cse7 .cse5 .cse2 .cse3 .cse4) (and .cse7 .cse0 .cse3) (and .cse10 .cse11 .cse3) (and .cse12 .cse3 .cse13) (and .cse14 .cse15 .cse3) (and .cse14 .cse9 .cse3) (and .cse10 .cse5 .cse2 .cse3 .cse4) (and .cse11 .cse6 .cse3) (and .cse14 .cse0 .cse3) (and .cse14 .cse11 .cse3) (and .cse8 .cse6 .cse3) (and .cse10 .cse0 .cse3) (and .cse6 .cse15 .cse3) (and .cse9 .cse7 .cse3) (and .cse12 .cse11 .cse3) (and .cse9 .cse10 .cse3) (and .cse9 .cse1 .cse2 .cse3 .cse4) (and .cse6 .cse3 .cse13) (and .cse12 .cse8 .cse3) (and .cse14 .cse8 .cse3) (and .cse7 .cse15 .cse3) (and .cse12 .cse5 .cse2 .cse3 .cse4) (and .cse0 .cse6 .cse3) (and .cse9 .cse12 .cse3) (and .cse7 .cse11 .cse3) (and .cse11 .cse1 .cse2 .cse3 .cse4) (and .cse1 .cse15 (= (_ bv6 32) ULTIMATE.start_main_~d~0) .cse3) (and .cse12 .cse15 .cse3) (and .cse8 .cse1 .cse2 .cse3 .cse4) (and .cse12 .cse0 .cse3) (and .cse10 .cse3 .cse13) (and .cse7 .cse3 .cse13) (and .cse10 .cse8 .cse3) (and .cse10 .cse15 .cse3) (and .cse14 .cse3 .cse13) (and .cse14 .cse5 .cse2 .cse3 .cse4) (and .cse1 .cse2 .cse3 .cse4 .cse13))) [2021-10-13 07:16:58,760 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:16:58,761 INFO L857 garLoopResultBuilder]: For program point L25-2(lines 25 27) no Hoare annotation was computed. [2021-10-13 07:16:58,761 INFO L853 garLoopResultBuilder]: At program point L25-3(lines 25 27) the Hoare annotation is: (let ((.cse8 (= (_ bv2 32) ULTIMATE.start_main_~c~0)) (.cse12 (= (_ bv3 32) ULTIMATE.start_main_~c~0)) (.cse9 (= (_ bv3 32) ULTIMATE.start_main_~b~0)) (.cse7 (= ULTIMATE.start_main_~b~0 (_ bv1 32))) (.cse10 (= (_ bv4 32) ULTIMATE.start_main_~c~0)) (.cse6 (= (_ bv4 32) ULTIMATE.start_main_~b~0)) (.cse0 (= ULTIMATE.start_main_~c~0 (_ bv1 32))) (.cse1 (= ULTIMATE.start_main_~b~0 (_ bv5 32))) (.cse11 (= (_ bv2 32) ULTIMATE.start_main_~b~0)) (.cse5 (= ULTIMATE.start_main_~c~0 (_ bv5 32))) (.cse2 (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~d~0) (_ bv6 32))) (.cse4 (= ULTIMATE.start_main_~b~0 (_ bv0 32))) (.cse3 (bvslt ULTIMATE.start_main_~a~0 (_ bv6 32))) (.cse13 (= ULTIMATE.start_main_~c~0 (_ bv0 32)))) (or (and .cse0 .cse1 .cse2 .cse3) (and .cse4 .cse5 .cse2 .cse3) (and .cse6 .cse0 .cse3) (and .cse7 .cse5 .cse2 .cse3) (and (= ULTIMATE.start_main_~d~0 (_ bv0 32)) .cse1 .cse5 .cse3) (and .cse8 .cse9 .cse3) (and .cse6 .cse10 .cse3) (and .cse11 .cse12 .cse3) (and .cse7 .cse3 .cse13) (and .cse4 .cse8 .cse3) (and .cse12 .cse9 .cse3) (and .cse4 .cse10 .cse3) (and .cse4 .cse12 .cse3) (and .cse0 .cse9 .cse3) (and .cse11 .cse10 .cse3) (and .cse10 .cse1 .cse2 .cse3) (and .cse8 .cse6 .cse3) (and .cse7 .cse12 .cse3) (and .cse8 .cse11 .cse3) (and .cse12 .cse1 .cse2 .cse3) (and .cse9 .cse3 .cse13) (and .cse7 .cse0 .cse3) (and .cse4 .cse0 .cse3) (and .cse6 .cse5 .cse2 .cse3) (and (= (_ bv2 32) ULTIMATE.start_main_~d~0) .cse1 .cse5 .cse3) (and .cse8 .cse1 .cse2 .cse3) (and (= ULTIMATE.start_main_~d~0 (_ bv1 32)) .cse1 .cse5 .cse3) (and .cse10 .cse9 .cse3) (and .cse8 .cse7 .cse3) (and (= (_ bv3 32) ULTIMATE.start_main_~d~0) .cse1 .cse5 .cse3) (and .cse6 .cse12 .cse3) (and (= (_ bv4 32) ULTIMATE.start_main_~d~0) .cse1 .cse5 .cse3) (and .cse1 .cse5 (= (_ bv6 32) ULTIMATE.start_main_~d~0) .cse3) (and .cse9 .cse5 .cse2 .cse3) (and .cse7 .cse10 .cse3) (and .cse11 .cse3 .cse13) (and .cse1 (= ULTIMATE.start_main_~d~0 (_ bv5 32)) .cse5 .cse3) (and .cse6 .cse3 .cse13) (and .cse11 .cse0 .cse3) (and .cse1 .cse2 .cse3 .cse13) (and .cse11 .cse5 .cse2 .cse3) (and .cse4 .cse3 .cse13))) [2021-10-13 07:16:58,761 INFO L860 garLoopResultBuilder]: At program point L34(lines 15 35) the Hoare annotation is: true [2021-10-13 07:16:58,762 INFO L857 garLoopResultBuilder]: For program point L22-2(lines 22 30) no Hoare annotation was computed. [2021-10-13 07:16:58,762 INFO L853 garLoopResultBuilder]: At program point L22-3(lines 22 30) the Hoare annotation is: (and (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~c~0) (_ bv6 32)) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~a~0) (_ bv6 32)) (bvslt (bvadd (_ bv4294967295 32) ULTIMATE.start_main_~d~0) (_ bv6 32)) (= (_ bv6 32) ULTIMATE.start_main_~b~0) (not (bvslt ULTIMATE.start_main_~d~0 (_ bv6 32))) (not (bvslt ULTIMATE.start_main_~c~0 (_ bv6 32)))) [2021-10-13 07:16:58,762 INFO L857 garLoopResultBuilder]: For program point L22-4(lines 15 35) no Hoare annotation was computed. [2021-10-13 07:16:58,766 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:16:58,814 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:16:58 BoogieIcfgContainer [2021-10-13 07:16:58,814 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:16:58,814 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:16:58,815 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:16:58,815 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:16:58,816 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:15" (3/4) ... [2021-10-13 07:16:58,819 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:16:58,831 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-13 07:16:58,831 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:16:58,832 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:16:58,832 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:16:58,890 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:16:58,890 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:16:58,892 INFO L168 Benchmark]: Toolchain (without parser) took 164529.12 ms. Allocated memory was 67.1 MB in the beginning and 522.2 MB in the end (delta: 455.1 MB). Free memory was 47.1 MB in the beginning and 243.4 MB in the end (delta: -196.3 MB). Peak memory consumption was 257.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:58,893 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 67.1 MB. Free memory is still 47.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:16:58,893 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.17 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 37.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:58,894 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.47 ms. Allocated memory is still 67.1 MB. Free memory was 37.1 MB in the beginning and 50.5 MB in the end (delta: -13.4 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:58,895 INFO L168 Benchmark]: Boogie Preprocessor took 62.76 ms. Allocated memory is still 67.1 MB. Free memory was 50.5 MB in the beginning and 49.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:58,896 INFO L168 Benchmark]: RCFGBuilder took 475.79 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 39.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:58,896 INFO L168 Benchmark]: TraceAbstraction took 163497.47 ms. Allocated memory was 67.1 MB in the beginning and 522.2 MB in the end (delta: 455.1 MB). Free memory was 39.3 MB in the beginning and 246.5 MB in the end (delta: -207.2 MB). Peak memory consumption was 382.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:58,897 INFO L168 Benchmark]: Witness Printer took 75.91 ms. Allocated memory is still 522.2 MB. Free memory was 246.5 MB in the beginning and 243.4 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:16:58,900 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 67.1 MB. Free memory is still 47.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 341.17 ms. Allocated memory is still 67.1 MB. Free memory was 46.9 MB in the beginning and 37.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 65.47 ms. Allocated memory is still 67.1 MB. Free memory was 37.1 MB in the beginning and 50.5 MB in the end (delta: -13.4 MB). Peak memory consumption was 2.9 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 62.76 ms. Allocated memory is still 67.1 MB. Free memory was 50.5 MB in the beginning and 49.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 475.79 ms. Allocated memory is still 67.1 MB. Free memory was 49.4 MB in the beginning and 39.8 MB in the end (delta: 9.5 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 163497.47 ms. Allocated memory was 67.1 MB in the beginning and 522.2 MB in the end (delta: 455.1 MB). Free memory was 39.3 MB in the beginning and 246.5 MB in the end (delta: -207.2 MB). Peak memory consumption was 382.7 MB. Max. memory is 16.1 GB. * Witness Printer took 75.91 ms. Allocated memory is still 522.2 MB. Free memory was 246.5 MB in the beginning and 243.4 MB in the end (delta: 3.1 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 - PositiveResult [Line: 32]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 163329.7ms, OverallIterations: 8, TraceHistogramMax: 1296, EmptinessCheckTime: 268.4ms, AutomataDifference: 22978.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 7174.2ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 217 SDtfs, 2588 SDslu, 1398 SDs, 0 SdLazy, 4990 SolverSat, 1524 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 4748.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23597 GetRequests, 23251 SyntacticMatches, 5 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19338 ImplicationChecksByTransitivity, 25045.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=3372occurred in iteration=7, InterpolantAutomatonStates: 270, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 556.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 1819 NumberOfFragments, 1195 HoareAnnotationTreeSize, 5 FomulaSimplifications, 48852 FormulaSimplificationTreeSizeReduction, 4561.2ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 687 FormulaSimplificationTreeSizeReductionInter, 2596.5ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1292.5ms SsaConstructionTime, 12816.9ms SatisfiabilityAnalysisTime, 100877.6ms InterpolantComputationTime, 11698 NumberOfCodeBlocks, 3580 NumberOfCodeBlocksAsserted, 581 NumberOfCheckSat, 23368 ConstructedInterpolants, 0 QuantifiedInterpolants, 61699 SizeOfPredicates, 26 NumberOfNonLiveVariables, 4254 ConjunctsInSsa, 98 ConjunctsInUnsatCore, 28 InterpolantComputations, 10 PerfectInterpolantSequences, 12171466/12383460 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 15]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: (((((((((((((((((((((((((((((((((((((((((((c == 1bv32 && b == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) || (((b == 0bv32 && c == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32))) || ((4bv32 == b && c == 1bv32) && ~bvslt32(a, 6bv32))) || (((b == 1bv32 && c == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32))) || (((d == 0bv32 && b == 5bv32) && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((2bv32 == c && 3bv32 == b) && ~bvslt32(a, 6bv32))) || ((4bv32 == b && 4bv32 == c) && ~bvslt32(a, 6bv32))) || ((2bv32 == b && 3bv32 == c) && ~bvslt32(a, 6bv32))) || ((b == 1bv32 && ~bvslt32(a, 6bv32)) && c == 0bv32)) || ((b == 0bv32 && 2bv32 == c) && ~bvslt32(a, 6bv32))) || ((3bv32 == c && 3bv32 == b) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && 4bv32 == c) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && 3bv32 == c) && ~bvslt32(a, 6bv32))) || ((c == 1bv32 && 3bv32 == b) && ~bvslt32(a, 6bv32))) || ((2bv32 == b && 4bv32 == c) && ~bvslt32(a, 6bv32))) || (((4bv32 == c && b == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32))) || ((2bv32 == c && 4bv32 == b) && ~bvslt32(a, 6bv32))) || ((b == 1bv32 && 3bv32 == c) && ~bvslt32(a, 6bv32))) || ((2bv32 == c && 2bv32 == b) && ~bvslt32(a, 6bv32))) || (((3bv32 == c && b == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32))) || ((3bv32 == b && ~bvslt32(a, 6bv32)) && c == 0bv32)) || ((b == 1bv32 && c == 1bv32) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && c == 1bv32) && ~bvslt32(a, 6bv32))) || (((4bv32 == b && c == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32))) || (((2bv32 == d && b == 5bv32) && c == 5bv32) && ~bvslt32(a, 6bv32))) || (((2bv32 == c && b == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32))) || (((d == 1bv32 && b == 5bv32) && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((4bv32 == c && 3bv32 == b) && ~bvslt32(a, 6bv32))) || ((2bv32 == c && b == 1bv32) && ~bvslt32(a, 6bv32))) || (((3bv32 == d && b == 5bv32) && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((4bv32 == b && 3bv32 == c) && ~bvslt32(a, 6bv32))) || (((4bv32 == d && b == 5bv32) && c == 5bv32) && ~bvslt32(a, 6bv32))) || (((b == 5bv32 && c == 5bv32) && 6bv32 == d) && ~bvslt32(a, 6bv32))) || (((3bv32 == b && c == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32))) || ((b == 1bv32 && 4bv32 == c) && ~bvslt32(a, 6bv32))) || ((2bv32 == b && ~bvslt32(a, 6bv32)) && c == 0bv32)) || (((b == 5bv32 && d == 5bv32) && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((4bv32 == b && ~bvslt32(a, 6bv32)) && c == 0bv32)) || ((2bv32 == b && c == 1bv32) && ~bvslt32(a, 6bv32))) || (((b == 5bv32 && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && c == 0bv32)) || (((2bv32 == b && c == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && ~bvslt32(a, 6bv32)) && c == 0bv32) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((b == 5bv32 && ~bvslt32(~bvadd64(4294967295bv32, c), 6bv32)) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32)) && !~bvslt32(c, 6bv32)) || ((((6bv32 == c && 3bv32 == b) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((((4bv32 == b && 6bv32 == c) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((((2bv32 == b && 6bv32 == c) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((((b == 1bv32 && 6bv32 == c) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((((b == 0bv32 && 6bv32 == c) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || (((((~bvslt32(~bvadd64(4294967295bv32, c), 6bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && 6bv32 == b) && !~bvslt32(d, 6bv32)) && !~bvslt32(c, 6bv32)) - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: ((((~bvslt32(~bvadd64(4294967295bv32, c), 6bv32) && ~bvslt32(~bvadd64(4294967295bv32, a), 6bv32)) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && 6bv32 == b) && !~bvslt32(d, 6bv32)) && !~bvslt32(c, 6bv32) - InvariantResult [Line: 24]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((4bv32 == c && b == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32)) || (((((b == 5bv32 && ~bvslt32(~bvadd64(4294967295bv32, c), 6bv32)) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32)) && !~bvslt32(c, 6bv32))) || ((((6bv32 == c && 3bv32 == b) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((4bv32 == b && c == 1bv32) && ~bvslt32(a, 6bv32))) || ((2bv32 == c && 3bv32 == b) && ~bvslt32(a, 6bv32))) || ((((4bv32 == b && 6bv32 == c) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((4bv32 == b && 4bv32 == c) && ~bvslt32(a, 6bv32))) || ((2bv32 == b && 3bv32 == c) && ~bvslt32(a, 6bv32))) || ((b == 1bv32 && ~bvslt32(a, 6bv32)) && c == 0bv32)) || ((b == 0bv32 && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && 2bv32 == c) && ~bvslt32(a, 6bv32))) || ((((2bv32 == b && 6bv32 == c) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((3bv32 == c && 3bv32 == b) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && 4bv32 == c) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && 3bv32 == c) && ~bvslt32(a, 6bv32))) || ((c == 1bv32 && 3bv32 == b) && ~bvslt32(a, 6bv32))) || ((2bv32 == b && 4bv32 == c) && ~bvslt32(a, 6bv32))) || ((3bv32 == b && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((2bv32 == c && 4bv32 == b) && ~bvslt32(a, 6bv32))) || ((b == 1bv32 && 3bv32 == c) && ~bvslt32(a, 6bv32))) || ((2bv32 == c && 2bv32 == b) && ~bvslt32(a, 6bv32))) || ((((2bv32 == c && b == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((3bv32 == b && ~bvslt32(a, 6bv32)) && c == 0bv32)) || ((b == 1bv32 && c == 1bv32) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && c == 1bv32) && ~bvslt32(a, 6bv32))) || ((4bv32 == b && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((((b == 1bv32 && 6bv32 == c) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((4bv32 == c && 3bv32 == b) && ~bvslt32(a, 6bv32))) || ((2bv32 == c && b == 1bv32) && ~bvslt32(a, 6bv32))) || ((4bv32 == b && 3bv32 == c) && ~bvslt32(a, 6bv32))) || ((((3bv32 == c && b == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || (((b == 5bv32 && c == 5bv32) && 6bv32 == d) && ~bvslt32(a, 6bv32))) || ((b == 1bv32 && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((((c == 1bv32 && b == 5bv32) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((b == 1bv32 && 4bv32 == c) && ~bvslt32(a, 6bv32))) || ((2bv32 == b && ~bvslt32(a, 6bv32)) && c == 0bv32)) || ((4bv32 == b && ~bvslt32(a, 6bv32)) && c == 0bv32)) || ((2bv32 == b && c == 1bv32) && ~bvslt32(a, 6bv32))) || ((2bv32 == b && c == 5bv32) && ~bvslt32(a, 6bv32))) || ((b == 0bv32 && ~bvslt32(a, 6bv32)) && c == 0bv32)) || ((((b == 0bv32 && 6bv32 == c) && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32))) || ((((b == 5bv32 && ~bvslt32(~bvadd64(4294967295bv32, d), 6bv32)) && ~bvslt32(a, 6bv32)) && !~bvslt32(d, 6bv32)) && c == 0bv32) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:16:59,008 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3fe615ac-874d-4ead-8679-5995a597aa51/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...