./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.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_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/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_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/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_2b0b8048-2480-4fe1-b446-86b79413cca0/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 a7229e8a44b2e722f2959b3a75b7a0e7b1e4a207 ............................................................................................................................................................................................................................................................................................................................................................................ 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_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/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_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/config/TaipanReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/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_2b0b8048-2480-4fe1-b446-86b79413cca0/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 a7229e8a44b2e722f2959b3a75b7a0e7b1e4a207 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 07:13:14,231 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:13:14,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:13:14,284 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:13:14,284 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:13:14,288 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:13:14,291 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:13:14,295 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:13:14,298 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:13:14,303 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:13:14,304 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:13:14,306 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:13:14,307 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:13:14,309 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:13:14,311 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:13:14,317 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:13:14,318 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:13:14,320 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:13:14,324 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:13:14,333 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:13:14,335 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:13:14,336 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:13:14,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:13:14,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:13:14,349 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:13:14,350 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:13:14,350 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:13:14,352 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:13:14,353 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:13:14,354 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:13:14,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:13:14,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:13:14,357 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:13:14,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:13:14,360 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:13:14,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:13:14,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:13:14,361 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:13:14,361 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:13:14,362 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:13:14,363 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:13:14,364 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-13 07:13:14,411 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:13:14,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:13:14,413 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:13:14,413 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:13:14,414 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:13:14,414 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:13:14,414 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:13:14,414 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:13:14,414 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:13:14,415 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:13:14,416 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:13:14,416 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:13:14,416 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:13:14,417 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:13:14,417 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:13:14,418 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:13:14,418 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:13:14,418 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:13:14,418 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:13:14,419 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:13:14,419 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:13:14,419 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:13:14,419 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:13:14,419 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:13:14,420 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:13:14,420 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:13:14,420 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:13:14,420 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:13:14,421 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:13:14,422 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:13:14,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:13:14,422 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:13:14,423 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:13:14,423 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:13:14,423 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:13:14,423 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:13:14,424 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:13:14,424 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:13:14,424 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:13:14,424 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_2b0b8048-2480-4fe1-b446-86b79413cca0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7229e8a44b2e722f2959b3a75b7a0e7b1e4a207 [2021-10-13 07:13:14,699 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:13:14,731 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:13:14,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:13:14,734 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:13:14,735 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:13:14,736 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-10-13 07:13:14,798 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data/d13c4c4ff/3aac6d2d71f4450aaaa927d08fc3a028/FLAG5fe764ef7 [2021-10-13 07:13:15,284 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:13:15,285 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-10-13 07:13:15,297 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data/d13c4c4ff/3aac6d2d71f4450aaaa927d08fc3a028/FLAG5fe764ef7 [2021-10-13 07:13:15,649 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data/d13c4c4ff/3aac6d2d71f4450aaaa927d08fc3a028 [2021-10-13 07:13:15,651 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:13:15,652 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:13:15,660 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:13:15,660 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:13:15,664 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:13:15,665 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:15,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34c2e00f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15, skipping insertion in model container [2021-10-13 07:13:15,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:15,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:13:15,688 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:13:15,892 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_2b0b8048-2480-4fe1-b446-86b79413cca0/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2021-10-13 07:13:15,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:13:15,933 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:13:15,952 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_2b0b8048-2480-4fe1-b446-86b79413cca0/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2021-10-13 07:13:15,968 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:13:15,983 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:13:15,984 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15 WrapperNode [2021-10-13 07:13:15,984 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:13:15,986 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:13:15,986 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:13:15,986 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:13:15,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,002 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,027 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:13:16,028 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:13:16,029 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:13:16,029 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:13:16,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,049 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,049 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,062 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,068 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:13:16,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:13:16,075 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:13:16,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:13:16,076 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (1/1) ... [2021-10-13 07:13:16,083 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:13:16,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:13:16,106 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:13:16,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:13:16,157 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 07:13:16,158 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:13:16,159 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:13:16,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:13:16,649 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:13:16,649 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 07:13:16,652 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:13:16 BoogieIcfgContainer [2021-10-13 07:13:16,652 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:13:16,653 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:13:16,654 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:13:16,657 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:13:16,657 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:13:15" (1/3) ... [2021-10-13 07:13:16,658 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3a831a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:13:16, skipping insertion in model container [2021-10-13 07:13:16,658 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:13:15" (2/3) ... [2021-10-13 07:13:16,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f3a831a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:13:16, skipping insertion in model container [2021-10-13 07:13:16,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:13:16" (3/3) ... [2021-10-13 07:13:16,660 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.c [2021-10-13 07:13:16,665 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:13:16,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:13:16,722 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:13:16,731 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 07:13:16,731 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:13:16,746 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 15 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 07:13:16,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:13:16,750 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:13:16,751 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:13:16,752 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:13:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:13:16,766 INFO L82 PathProgramCache]: Analyzing trace with hash 3301933, now seen corresponding path program 1 times [2021-10-13 07:13:16,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:13:16,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680356316] [2021-10-13 07:13:16,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:13:16,779 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:13:16,877 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:13:16,878 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1973517241] [2021-10-13 07:13:16,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:13:16,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:13:16,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:13:16,880 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:13:16,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:13:16,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:13:16,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:13:16,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:13:17,060 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 07:13:17,062 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:13:17,585 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 07:13:17,586 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:13:17,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680356316] [2021-10-13 07:13:17,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:13:17,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973517241] [2021-10-13 07:13:17,587 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973517241] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:13:17,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:13:17,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-13 07:13:17,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268878535] [2021-10-13 07:13:17,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 07:13:17,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:13:17,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 07:13:17,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-10-13 07:13:17,630 INFO L87 Difference]: Start difference. First operand has 16 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 15 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) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 07:14:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:29,901 INFO L93 Difference]: Finished difference Result 36 states and 48 transitions. [2021-10-13 07:14:29,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:14:29,903 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 4 [2021-10-13 07:14:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:29,911 INFO L225 Difference]: With dead ends: 36 [2021-10-13 07:14:29,911 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 07:14:29,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72305.6ms TimeCoverageRelationStatistics Valid=18, Invalid=22, Unknown=2, NotChecked=0, Total=42 [2021-10-13 07:14:29,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 07:14:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 07:14:29,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 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 07:14:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-13 07:14:29,944 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 4 [2021-10-13 07:14:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:29,945 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-13 07:14:29,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 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 07:14:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-13 07:14:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:14:29,946 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:29,946 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:29,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:30,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-10-13 07:14:30,161 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:30,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:30,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1160044347, now seen corresponding path program 1 times [2021-10-13 07:14:30,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:14:30,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66990317] [2021-10-13 07:14:30,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:30,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:14:30,179 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-13 07:14:30,179 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1297954722] [2021-10-13 07:14:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:30,180 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:30,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:30,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:14:30,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 07:14:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:30,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:14:30,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:30,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:30,586 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:30,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:30,861 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:14:30,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66990317] [2021-10-13 07:14:30,862 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-13 07:14:30,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297954722] [2021-10-13 07:14:30,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297954722] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:14:30,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [865143372] [2021-10-13 07:14:30,883 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-10-13 07:14:30,883 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:14:30,887 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:14:30,893 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:14:30,893 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:14:30,931 INFO L180 QuantifierPusher]: treesize reduction 8, result has 95.1 percent of original size [2021-10-13 07:14:30,933 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:14:30,934 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:30,935 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-13 07:14:30,935 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:14:30,936 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:30,936 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-13 07:14:30,940 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 157 [2021-10-13 07:14:30,993 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-10-13 07:14:30,998 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:30,999 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:14:31,000 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:31,000 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-13 07:14:31,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:14:31,025 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:31,026 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:31,027 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-13 07:14:31,035 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 9 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 16 [2021-10-13 07:14:31,036 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:31,037 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:14:31,038 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:31,039 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 16 [2021-10-13 07:14:31,039 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-13 07:14:31,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:14:31,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:14:31,117 INFO L180 QuantifierPusher]: treesize reduction 3, result has 98.0 percent of original size [2021-10-13 07:14:31,130 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 144 [2021-10-13 07:14:31,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:14:31,133 INFO L247 ElimStorePlain]: Needed 3 recursive calls to eliminate 1 variables, input treesize:290, output treesize:144 [2021-10-13 07:14:31,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:31,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:14:31,356 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#valid_14| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 07:14:31,359 INFO L168 Benchmark]: Toolchain (without parser) took 75706.44 ms. Allocated memory was 104.9 MB in the beginning and 148.9 MB in the end (delta: 44.0 MB). Free memory was 66.4 MB in the beginning and 117.1 MB in the end (delta: -50.7 MB). Peak memory consumption was 39.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:31,360 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 104.9 MB. Free memory was 82.6 MB in the beginning and 82.5 MB in the end (delta: 67.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:14:31,360 INFO L168 Benchmark]: CACSL2BoogieTranslator took 324.49 ms. Allocated memory is still 104.9 MB. Free memory was 66.2 MB in the beginning and 79.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:31,360 INFO L168 Benchmark]: Boogie Procedure Inliner took 41.77 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 77.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:14:31,361 INFO L168 Benchmark]: Boogie Preprocessor took 44.92 ms. Allocated memory is still 104.9 MB. Free memory was 77.5 MB in the beginning and 76.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:31,362 INFO L168 Benchmark]: RCFGBuilder took 577.97 ms. Allocated memory is still 104.9 MB. Free memory was 76.4 MB in the beginning and 64.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:31,362 INFO L168 Benchmark]: TraceAbstraction took 74705.04 ms. Allocated memory was 104.9 MB in the beginning and 148.9 MB in the end (delta: 44.0 MB). Free memory was 63.5 MB in the beginning and 117.1 MB in the end (delta: -53.6 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:14:31,366 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 104.9 MB. Free memory was 82.6 MB in the beginning and 82.5 MB in the end (delta: 67.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 324.49 ms. Allocated memory is still 104.9 MB. Free memory was 66.2 MB in the beginning and 79.2 MB in the end (delta: -13.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 41.77 ms. Allocated memory is still 104.9 MB. Free memory was 79.2 MB in the beginning and 77.5 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 44.92 ms. Allocated memory is still 104.9 MB. Free memory was 77.5 MB in the beginning and 76.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 577.97 ms. Allocated memory is still 104.9 MB. Free memory was 76.4 MB in the beginning and 64.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 74705.04 ms. Allocated memory was 104.9 MB in the beginning and 148.9 MB in the end (delta: 44.0 MB). Free memory was 63.5 MB in the beginning and 117.1 MB in the end (delta: -53.6 MB). Peak memory consumption was 38.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#valid_14| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#valid_14|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 07:14:31,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:14:33,638 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:14:33,640 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:14:33,695 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:14:33,696 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:14:33,700 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:14:33,702 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:14:33,706 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:14:33,709 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:14:33,721 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:14:33,722 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:14:33,724 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:14:33,724 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:14:33,727 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:14:33,729 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:14:33,734 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:14:33,736 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:14:33,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:14:33,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:14:33,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:14:33,750 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:14:33,751 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:14:33,755 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:14:33,756 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:14:33,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:14:33,766 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:14:33,766 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:14:33,767 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:14:33,769 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:14:33,770 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:14:33,771 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:14:33,771 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:14:33,773 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:14:33,774 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:14:33,775 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:14:33,776 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:14:33,777 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:14:33,777 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:14:33,777 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:14:33,779 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:14:33,779 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:14:33,780 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-13 07:14:33,821 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:14:33,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:14:33,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:14:33,823 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:14:33,823 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:14:33,823 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:14:33,823 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:14:33,824 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:14:33,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:14:33,825 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:14:33,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:14:33,826 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:14:33,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:14:33,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 07:14:33,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:14:33,827 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 07:14:33,827 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:14:33,828 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:14:33,828 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:14:33,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:14:33,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 07:14:33,829 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:14:33,829 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 07:14:33,829 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:14:33,829 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:14:33,830 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:14:33,830 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:33,830 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:14:33,830 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:14:33,830 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 07:14:33,831 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:14:33,831 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:14:33,831 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 07:14:33,831 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:14:33,832 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:14:33,832 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_2b0b8048-2480-4fe1-b446-86b79413cca0/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7229e8a44b2e722f2959b3a75b7a0e7b1e4a207 [2021-10-13 07:14:34,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:14:34,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:14:34,241 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:14:34,243 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:14:34,244 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:14:34,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-10-13 07:14:34,321 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data/b9df42f11/66ba20158b4442a9b444429a3390c6c7/FLAGb60b89e4a [2021-10-13 07:14:34,863 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:14:34,863 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c [2021-10-13 07:14:34,872 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data/b9df42f11/66ba20158b4442a9b444429a3390c6c7/FLAGb60b89e4a [2021-10-13 07:14:35,221 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/data/b9df42f11/66ba20158b4442a9b444429a3390c6c7 [2021-10-13 07:14:35,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:14:35,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:14:35,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:35,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:14:35,230 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:14:35,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49837009 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35, skipping insertion in model container [2021-10-13 07:14:35,232 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,239 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:14:35,253 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:14:35,386 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_2b0b8048-2480-4fe1-b446-86b79413cca0/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2021-10-13 07:14:35,405 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:35,429 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:14:35,450 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_2b0b8048-2480-4fe1-b446-86b79413cca0/sv-benchmarks/c/nla-digbench-scaling/ps6-ll_valuebound5.c[458,471] [2021-10-13 07:14:35,461 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:14:35,474 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:14:35,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35 WrapperNode [2021-10-13 07:14:35,477 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:14:35,496 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:35,496 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:14:35,496 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:14:35,526 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,533 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,562 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:14:35,563 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:14:35,563 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:14:35,563 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:14:35,571 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,572 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,574 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,581 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,585 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,587 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,589 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:14:35,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:14:35,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:14:35,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:14:35,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (1/1) ... [2021-10-13 07:14:35,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:14:35,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:14:35,622 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:14:35,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:14:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-13 07:14:35,675 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 07:14:35,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:14:35,676 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:14:37,165 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:14:37,165 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-10-13 07:14:37,167 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:37 BoogieIcfgContainer [2021-10-13 07:14:37,167 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:14:37,168 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:14:37,169 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:14:37,171 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:14:37,171 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:14:35" (1/3) ... [2021-10-13 07:14:37,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6adeaf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:37, skipping insertion in model container [2021-10-13 07:14:37,172 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:14:35" (2/3) ... [2021-10-13 07:14:37,172 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6adeaf31 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:14:37, skipping insertion in model container [2021-10-13 07:14:37,173 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:37" (3/3) ... [2021-10-13 07:14:37,174 INFO L111 eAbstractionObserver]: Analyzing ICFG ps6-ll_valuebound5.c [2021-10-13 07:14:37,179 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:14:37,179 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 07:14:37,226 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:14:37,232 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 07:14:37,232 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 07:14:37,245 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 22 states have internal predecessors, (30), 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 07:14:37,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:14:37,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:37,250 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:37,251 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:37,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:37,256 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2021-10-13 07:14:37,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:37,267 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2029083306] [2021-10-13 07:14:37,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:37,269 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:37,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:37,272 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:37,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:14:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:37,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 1 conjunts are in the unsatisfiable core [2021-10-13 07:14:37,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:37,615 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 07:14:37,616 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:37,670 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 07:14:37,671 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:37,671 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2029083306] [2021-10-13 07:14:37,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2029083306] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:37,672 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:37,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:14:37,674 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723339692] [2021-10-13 07:14:37,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 07:14:37,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:37,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 07:14:37,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 07:14:37,693 INFO L87 Difference]: Start difference. First operand has 23 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 07:14:37,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:37,706 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2021-10-13 07:14:37,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 07:14:37,708 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2021-10-13 07:14:37,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:37,715 INFO L225 Difference]: With dead ends: 43 [2021-10-13 07:14:37,715 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 07:14:37,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 16 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 07:14:37,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 07:14:37,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 07:14:37,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 16 states have (on average 1.1875) internal successors, (19), 18 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:37,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-13 07:14:37,744 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2021-10-13 07:14:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:37,745 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-13 07:14:37,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 07:14:37,745 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-13 07:14:37,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:14:37,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:37,746 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:37,765 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:37,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:37,962 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:37,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:37,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2021-10-13 07:14:37,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:37,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1020589776] [2021-10-13 07:14:37,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:37,965 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:37,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:37,966 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:37,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:14:38,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:38,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:14:38,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:14:38,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:14:38,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:14:42,067 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 07:14:42,068 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:14:42,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1020589776] [2021-10-13 07:14:42,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1020589776] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:14:42,069 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:14:42,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 07:14:42,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428814042] [2021-10-13 07:14:42,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:14:42,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:14:42,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:14:42,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:14:42,073 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:55,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:14:55,595 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-10-13 07:14:55,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:14:55,645 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-10-13 07:14:55,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:14:55,646 INFO L225 Difference]: With dead ends: 42 [2021-10-13 07:14:55,647 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 07:14:55,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 5680.8ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:14:55,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 07:14:55,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2021-10-13 07:14:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 26 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 07:14:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-10-13 07:14:55,657 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 9 [2021-10-13 07:14:55,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:14:55,658 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-10-13 07:14:55,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:14:55,658 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-10-13 07:14:55,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 07:14:55,659 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:14:55,660 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:14:55,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:14:55,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:14:55,873 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:14:55,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:14:55,874 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 1 times [2021-10-13 07:14:55,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:14:55,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1530727431] [2021-10-13 07:14:55,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:14:55,876 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:14:55,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:14:55,877 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:14:55,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:14:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:14:56,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:14:56,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:01,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:28,752 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 07:15:28,752 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:15:28,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1530727431] [2021-10-13 07:15:28,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1530727431] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:28,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [784306861] [2021-10-13 07:15:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:28,753 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:15:28,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:15:28,769 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:15:28,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:15:30,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:30,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:15:30,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:32,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:32,247 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:15:48,977 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 07:15:48,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [784306861] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:15:48,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159060268] [2021-10-13 07:15:48,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:15:48,978 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:15:48,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:15:48,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:15:48,995 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:15:49,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:15:49,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:15:49,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:15:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:15:53,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:10,011 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-10-13 07:16:10,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159060268] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:10,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:16:10,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 6, 4, 7, 4] total 9 [2021-10-13 07:16:10,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886833338] [2021-10-13 07:16:10,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 07:16:10,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:16:10,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 07:16:10,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-10-13 07:16:10,015 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:33,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:16:33,989 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-10-13 07:16:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 07:16:33,989 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-13 07:16:33,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:16:33,991 INFO L225 Difference]: With dead ends: 40 [2021-10-13 07:16:33,991 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 07:16:33,992 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 7 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 58417.2ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-10-13 07:16:33,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 07:16:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 18. [2021-10-13 07:16:33,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 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 07:16:33,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-10-13 07:16:33,999 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 15 [2021-10-13 07:16:33,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:16:33,999 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-10-13 07:16:34,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:16:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-10-13 07:16:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 07:16:34,001 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:16:34,001 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:16:34,031 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-13 07:16:34,254 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-13 07:16:34,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:16:34,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:16:34,606 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:16:34,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:16:34,606 INFO L82 PathProgramCache]: Analyzing trace with hash -531865812, now seen corresponding path program 1 times [2021-10-13 07:16:34,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:16:34,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [584631168] [2021-10-13 07:16:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:34,607 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:16:34,607 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:16:34,608 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:16:34,610 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:16:35,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:35,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 07:16:35,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:36,300 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:47,404 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:16:47,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [584631168] [2021-10-13 07:16:47,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [584631168] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:47,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1748246894] [2021-10-13 07:16:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:47,405 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:16:47,405 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:16:47,421 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:16:47,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:16:48,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:48,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:16:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:49,145 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:49,145 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:16:55,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:55,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1748246894] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:16:55,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342570669] [2021-10-13 07:16:55,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:16:55,818 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:16:55,818 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:16:55,821 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:16:55,822 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:16:56,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:16:56,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:16:56,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:16:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:16:57,389 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:17:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:02,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342570669] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:17:02,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:17:02,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6, 6, 9, 6] total 16 [2021-10-13 07:17:02,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468178657] [2021-10-13 07:17:02,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 07:17:02,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:17:02,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 07:17:02,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-10-13 07:17:02,742 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:44,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:17:44,098 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-10-13 07:17:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 07:17:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 07:17:44,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:17:44,114 INFO L225 Difference]: With dead ends: 41 [2021-10-13 07:17:44,115 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 07:17:44,116 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 39099.9ms TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 07:17:44,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 07:17:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 07:17:44,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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 07:17:44,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-10-13 07:17:44,127 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 17 [2021-10-13 07:17:44,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:17:44,127 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-10-13 07:17:44,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 07:17:44,128 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-10-13 07:17:44,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 07:17:44,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:17:44,129 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:17:44,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:44,378 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-13 07:17:44,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:17:44,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:17:44,738 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:17:44,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:17:44,739 INFO L82 PathProgramCache]: Analyzing trace with hash 728478426, now seen corresponding path program 2 times [2021-10-13 07:17:44,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:17:44,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [190949718] [2021-10-13 07:17:44,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:17:44,740 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:17:44,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:17:44,740 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:17:44,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:17:46,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:17:46,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:17:46,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 07:17:46,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:17:48,122 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:17:48,122 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:13,482 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:18:13,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [190949718] [2021-10-13 07:18:13,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [190949718] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:13,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [209949544] [2021-10-13 07:18:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:18:13,483 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:18:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:18:13,497 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:18:13,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:18:16,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:18:16,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:18:16,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 07:18:16,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:17,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:17,702 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:31,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:31,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [209949544] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:31,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046399540] [2021-10-13 07:18:31,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:18:31,947 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:18:31,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:18:31,961 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:18:31,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 07:18:33,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:18:33,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:18:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 07:18:33,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:18:35,949 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:35,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:18:47,514 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:18:47,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046399540] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:18:47,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:18:47,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9, 9, 9, 12, 9] total 28 [2021-10-13 07:18:47,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7474205] [2021-10-13 07:18:47,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 07:18:47,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:18:47,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 07:18:47,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2021-10-13 07:18:47,518 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 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 07:20:47,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:20:47,142 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2021-10-13 07:20:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 07:20:47,165 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 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 26 [2021-10-13 07:20:47,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:20:47,166 INFO L225 Difference]: With dead ends: 62 [2021-10-13 07:20:47,167 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 07:20:47,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 970 ImplicationChecksByTransitivity, 113437.9ms TimeCoverageRelationStatistics Valid=805, Invalid=2735, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 07:20:47,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 07:20:47,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-13 07:20:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 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 07:20:47,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-10-13 07:20:47,193 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 26 [2021-10-13 07:20:47,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:20:47,193 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-10-13 07:20:47,194 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.9285714285714284) internal successors, (82), 28 states have internal predecessors, (82), 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 07:20:47,194 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-10-13 07:20:47,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 07:20:47,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:20:47,195 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:20:47,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Ended with exit code 0 [2021-10-13 07:20:47,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:47,687 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:20:47,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:20:47,809 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 07:20:47,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:20:47,810 INFO L82 PathProgramCache]: Analyzing trace with hash 2003072364, now seen corresponding path program 3 times [2021-10-13 07:20:47,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:20:47,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [668150542] [2021-10-13 07:20:47,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:20:47,811 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:20:47,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:20:47,812 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:20:47,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-10-13 07:20:55,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-13 07:20:55,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:20:56,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 07:20:56,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:20:57,918 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 81 proven. 108 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:20:57,919 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:20:59,798 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 81 proven. 108 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-13 07:20:59,798 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:20:59,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [668150542] [2021-10-13 07:20:59,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [668150542] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:20:59,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2122888129] [2021-10-13 07:20:59,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:20:59,800 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:20:59,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:20:59,808 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:20:59,810 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-10-13 07:21:07,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-13 07:21:07,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:21:07,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 07:21:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:21:11,210 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:21:11,211 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:23:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:23:39,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2122888129] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:23:39,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996579251] [2021-10-13 07:23:39,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 07:23:39,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:23:39,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:23:39,928 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:23:39,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 07:23:45,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-13 07:23:45,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:23:45,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 07:23:45,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:23:52,697 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 108 proven. 45 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 07:23:52,698 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:24:13,968 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 132 proven. 21 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-10-13 07:24:13,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996579251] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:24:13,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:24:13,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 16, 16, 11, 12] total 66 [2021-10-13 07:24:13,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094518835] [2021-10-13 07:24:13,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-13 07:24:13,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:24:13,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-13 07:24:13,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=761, Invalid=3524, Unknown=5, NotChecked=0, Total=4290 [2021-10-13 07:24:13,974 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 66 states have internal predecessors, (195), 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 07:24:32,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:24:32,295 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-10-13 07:24:32,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 07:24:32,296 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 66 states have internal predecessors, (195), 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 07:24:32,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:24:32,297 INFO L225 Difference]: With dead ends: 48 [2021-10-13 07:24:32,297 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 07:24:32,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1413 ImplicationChecksByTransitivity, 156188.0ms TimeCoverageRelationStatistics Valid=1201, Invalid=4800, Unknown=5, NotChecked=0, Total=6006 [2021-10-13 07:24:32,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 07:24:32,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 07:24:32,300 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 07:24:32,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 07:24:32,300 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 47 [2021-10-13 07:24:32,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:24:32,300 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 07:24:32,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.9545454545454546) internal successors, (195), 66 states have internal predecessors, (195), 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 07:24:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 07:24:32,301 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 07:24:32,303 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:24:32,304 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:24:32,304 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 07:24:32,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:32,688 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-10-13 07:24:32,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-10-13 07:24:32,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:24:32,906 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 07:24:32,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:24:33,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:24:33,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:24:33,102 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:24:33,103 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:24:58,955 WARN L207 SmtUtils]: Spent 25.82 s on a formula simplification. DAG size of input: 137 DAG size of output: 81 [2021-10-13 07:25:21,790 WARN L207 SmtUtils]: Spent 22.83 s on a formula simplification. DAG size of input: 134 DAG size of output: 81 [2021-10-13 07:26:02,888 WARN L207 SmtUtils]: Spent 41.10 s on a formula simplification. DAG size of input: 150 DAG size of output: 61 [2021-10-13 07:26:02,890 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-13 07:26:02,891 INFO L857 garLoopResultBuilder]: For program point L11(lines 11 12) no Hoare annotation was computed. [2021-10-13 07:26:02,891 INFO L857 garLoopResultBuilder]: For program point L11-1(lines 11 12) no Hoare annotation was computed. [2021-10-13 07:26:02,891 INFO L857 garLoopResultBuilder]: For program point L11-2(lines 11 12) no Hoare annotation was computed. [2021-10-13 07:26:02,891 INFO L857 garLoopResultBuilder]: For program point L7(line 7) no Hoare annotation was computed. [2021-10-13 07:26:02,891 INFO L857 garLoopResultBuilder]: For program point L7-2(line 7) no Hoare annotation was computed. [2021-10-13 07:26:02,891 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 07:26:02,891 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 07:26:02,891 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 07:26:02,892 INFO L853 garLoopResultBuilder]: At program point L28-2(lines 28 37) the Hoare annotation is: (let ((.cse10 ((_ sign_extend 16) ULTIMATE.start_main_~k~0))) (let ((.cse16 (bvmul ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (.cse12 ((_ sign_extend 32) .cse10))) (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32))) (.cse8 ((_ sign_extend 32) (_ bv0 32))) (.cse15 (= .cse16 (bvmul .cse12 ULTIMATE.start_main_~y~0)))) (let ((.cse5 (or .cse15 (bvslt ULTIMATE.start_main_~c~0 .cse12))) (.cse6 (bvsle .cse10 (_ bv5 32))) (.cse2 (= .cse8 (bvadd (bvmul ((_ sign_extend 32) (_ bv4294967294 32)) ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (bvmul ((_ sign_extend 32) (_ bv12 32)) ULTIMATE.start_main_~x~0) .cse16 (bvneg (bvmul (bvmul (bvmul (bvmul ((_ sign_extend 32) (_ bv5 32)) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0)) (bvneg (bvmul (bvmul (bvmul (bvmul (bvmul ((_ sign_extend 32) (_ bv6 32)) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0))))) (.cse3 (or .cse0 (= ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)))) (.cse4 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (.cse7 ((_ sign_extend 32) (_ bv1 32)))) (or (let ((.cse1 (bvadd (bvmul (_ bv4 64) .cse7) .cse8))) (and .cse0 (= ULTIMATE.start_main_~y~0 .cse1) .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~c~0 .cse1) .cse6)) (let ((.cse9 (bvadd .cse8 (bvmul (_ bv3 64) .cse7)))) (and .cse0 (= ULTIMATE.start_main_~y~0 .cse9) .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~c~0 .cse9) .cse5 .cse6)) (and (= .cse8 ULTIMATE.start_main_~y~0) (= .cse8 ULTIMATE.start_main_~c~0) (= .cse8 ULTIMATE.start_main_~x~0) .cse0 (bvsge .cse10 (_ bv0 32)) .cse6) (let ((.cse11 (bvadd .cse8 .cse7))) (and (= ULTIMATE.start_main_~y~0 .cse11) .cse0 (= ULTIMATE.start_main_~c~0 .cse11) .cse2 .cse3 .cse4 (bvslt .cse8 .cse12) .cse6)) (let ((.cse13 (bvadd .cse8 (bvmul (_ bv2 64) .cse7)))) (and .cse0 (= .cse13 ULTIMATE.start_main_~c~0) .cse2 .cse3 .cse4 .cse5 (= .cse13 ULTIMATE.start_main_~y~0) .cse6)) (let ((.cse14 (bvadd .cse8 (bvmul (_ bv5 64) .cse7)))) (and (= ULTIMATE.start_main_~c~0 .cse14) .cse0 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~y~0 .cse14) .cse15))))))) [2021-10-13 07:26:02,892 INFO L857 garLoopResultBuilder]: For program point L28-3(lines 28 37) no Hoare annotation was computed. [2021-10-13 07:26:02,892 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-13 07:26:02,892 INFO L860 garLoopResultBuilder]: At program point L41(lines 17 42) the Hoare annotation is: true [2021-10-13 07:26:02,892 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 07:26:02,892 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 12) no Hoare annotation was computed. [2021-10-13 07:26:02,892 INFO L857 garLoopResultBuilder]: For program point L10(lines 10 13) no Hoare annotation was computed. [2021-10-13 07:26:02,893 INFO L853 garLoopResultBuilder]: At program point L10-2(lines 31 32) the Hoare annotation is: (let ((.cse9 ((_ sign_extend 16) ULTIMATE.start_main_~k~0))) (let ((.cse16 (bvmul ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0)) (.cse12 ((_ sign_extend 32) .cse9))) (let ((.cse0 (= ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32))) (.cse8 ((_ sign_extend 32) (_ bv0 32))) (.cse15 (= .cse16 (bvmul .cse12 ULTIMATE.start_main_~y~0)))) (let ((.cse5 (or .cse15 (bvslt ULTIMATE.start_main_~c~0 .cse12))) (.cse6 (bvsle .cse9 (_ bv5 32))) (.cse2 (= .cse8 (bvadd (bvmul ((_ sign_extend 32) (_ bv4294967294 32)) ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (bvmul ((_ sign_extend 32) (_ bv12 32)) ULTIMATE.start_main_~x~0) .cse16 (bvneg (bvmul (bvmul (bvmul (bvmul ((_ sign_extend 32) (_ bv5 32)) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0)) (bvneg (bvmul (bvmul (bvmul (bvmul (bvmul ((_ sign_extend 32) (_ bv6 32)) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0))))) (.cse3 (or .cse0 (= ULTIMATE.start_assume_abort_if_not_~cond (_ bv0 32)))) (.cse4 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32))) (.cse7 ((_ sign_extend 32) (_ bv1 32)))) (or (let ((.cse1 (bvadd (bvmul (_ bv4 64) .cse7) .cse8))) (and .cse0 (= ULTIMATE.start_main_~y~0 .cse1) .cse2 .cse3 .cse4 .cse5 (= ULTIMATE.start_main_~c~0 .cse1) .cse6)) (and (= .cse8 ULTIMATE.start_main_~y~0) (= .cse8 ULTIMATE.start_main_~c~0) (= .cse8 ULTIMATE.start_main_~x~0) .cse0 (bvsge .cse9 (_ bv0 32)) .cse4 .cse6) (let ((.cse10 (bvadd .cse8 (bvmul (_ bv3 64) .cse7)))) (and .cse0 (= ULTIMATE.start_main_~y~0 .cse10) .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~c~0 .cse10) .cse5 .cse6)) (let ((.cse11 (bvadd .cse8 .cse7))) (and (= ULTIMATE.start_main_~y~0 .cse11) .cse0 (= ULTIMATE.start_main_~c~0 .cse11) .cse2 .cse3 .cse4 (bvslt .cse8 .cse12) .cse6)) (let ((.cse13 (bvadd .cse8 (bvmul (_ bv2 64) .cse7)))) (and .cse0 (= .cse13 ULTIMATE.start_main_~c~0) .cse2 .cse3 .cse4 .cse5 (= .cse13 ULTIMATE.start_main_~y~0) .cse6)) (let ((.cse14 (bvadd .cse8 (bvmul (_ bv5 64) .cse7)))) (and (= ULTIMATE.start_main_~c~0 .cse14) .cse0 .cse2 .cse3 .cse4 (= ULTIMATE.start_main_~y~0 .cse14) .cse15))))))) [2021-10-13 07:26:02,893 INFO L857 garLoopResultBuilder]: For program point L10-3(lines 10 13) no Hoare annotation was computed. [2021-10-13 07:26:02,893 INFO L857 garLoopResultBuilder]: For program point L6(lines 6 8) no Hoare annotation was computed. [2021-10-13 07:26:02,893 INFO L857 garLoopResultBuilder]: For program point L6-1(lines 6 8) no Hoare annotation was computed. [2021-10-13 07:26:02,893 INFO L853 garLoopResultBuilder]: At program point L10-5(lines 9 15) the Hoare annotation is: (let ((.cse0 ((_ sign_extend 32) (_ bv0 32))) (.cse1 (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)))) (or (and (= .cse0 ULTIMATE.start_main_~y~0) (= .cse0 ULTIMATE.start_main_~x~0) .cse1) (let ((.cse2 ((_ sign_extend 16) ULTIMATE.start_main_~k~0))) (let ((.cse5 ((_ sign_extend 32) .cse2))) (let ((.cse4 (bvmul .cse5 ULTIMATE.start_main_~y~0)) (.cse3 (bvmul ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0))) (and (= ULTIMATE.start_assume_abort_if_not_~cond (_ bv1 32)) (bvsge .cse2 (_ bv0 32)) (= .cse0 (bvadd (bvmul ((_ sign_extend 32) (_ bv4294967294 32)) ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0 ULTIMATE.start_main_~y~0) (bvmul ((_ sign_extend 32) (_ bv12 32)) ULTIMATE.start_main_~x~0) .cse3 (bvneg (bvmul (bvmul (bvmul (bvmul ((_ sign_extend 32) (_ bv5 32)) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0)) (bvneg (bvmul (bvmul (bvmul (bvmul (bvmul ((_ sign_extend 32) (_ bv6 32)) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0) ULTIMATE.start_main_~y~0)))) .cse1 (= .cse3 .cse4) (let ((.cse6 ((_ sign_extend 32) (_ bv1 32)))) (or (not (bvslt ULTIMATE.start_main_~c~0 .cse5)) (= (bvadd (bvmul .cse5 .cse6) .cse4) (bvadd .cse3 (bvmul (_ bv2 64) (bvmul .cse6 ULTIMATE.start_main_~y~0)) (bvmul .cse6 .cse6))) (bvslt (bvadd .cse6 ULTIMATE.start_main_~c~0) .cse5))) (bvsle .cse2 (_ bv5 32)))))))) [2021-10-13 07:26:02,893 INFO L857 garLoopResultBuilder]: For program point L10-6(lines 10 13) no Hoare annotation was computed. [2021-10-13 07:26:02,893 INFO L860 garLoopResultBuilder]: At program point L10-8(lines 9 15) the Hoare annotation is: true [2021-10-13 07:26:02,898 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:26:02,954 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:26:02 BoogieIcfgContainer [2021-10-13 07:26:02,954 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:26:02,955 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:26:02,958 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:26:02,959 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:26:02,959 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:14:37" (3/4) ... [2021-10-13 07:26:02,962 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 07:26:02,971 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-10-13 07:26:02,974 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 07:26:02,974 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:26:02,974 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 07:26:03,034 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:26:03,034 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:26:03,035 INFO L168 Benchmark]: Toolchain (without parser) took 687808.79 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 50.1 MB in the beginning and 35.8 MB in the end (delta: 14.3 MB). Peak memory consumption was 28.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:03,035 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 49.5 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:26:03,036 INFO L168 Benchmark]: CACSL2BoogieTranslator took 250.86 ms. Allocated memory is still 69.2 MB. Free memory was 50.0 MB in the beginning and 39.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:03,036 INFO L168 Benchmark]: Boogie Procedure Inliner took 66.51 ms. Allocated memory is still 69.2 MB. Free memory was 53.1 MB in the beginning and 51.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:03,037 INFO L168 Benchmark]: Boogie Preprocessor took 26.67 ms. Allocated memory is still 69.2 MB. Free memory was 51.5 MB in the beginning and 50.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:26:03,037 INFO L168 Benchmark]: RCFGBuilder took 1576.78 ms. Allocated memory is still 69.2 MB. Free memory was 50.1 MB in the beginning and 39.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:03,038 INFO L168 Benchmark]: TraceAbstraction took 685785.67 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 39.2 MB in the beginning and 40.0 MB in the end (delta: -847.1 kB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:03,038 INFO L168 Benchmark]: Witness Printer took 79.69 ms. Allocated memory is still 83.9 MB. Free memory was 40.0 MB in the beginning and 35.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 07:26:03,040 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 69.2 MB. Free memory was 49.5 MB in the beginning and 49.5 MB in the end (delta: 54.7 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 250.86 ms. Allocated memory is still 69.2 MB. Free memory was 50.0 MB in the beginning and 39.1 MB in the end (delta: 10.8 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 66.51 ms. Allocated memory is still 69.2 MB. Free memory was 53.1 MB in the beginning and 51.5 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.67 ms. Allocated memory is still 69.2 MB. Free memory was 51.5 MB in the beginning and 50.4 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 1576.78 ms. Allocated memory is still 69.2 MB. Free memory was 50.1 MB in the beginning and 39.8 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 685785.67 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 39.2 MB in the beginning and 40.0 MB in the end (delta: -847.1 kB). Peak memory consumption was 40.6 MB. Max. memory is 16.1 GB. * Witness Printer took 79.69 ms. Allocated memory is still 83.9 MB. Free memory was 40.0 MB in the beginning and 35.8 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 12]: 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, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 685673.9ms, OverallIterations: 6, TraceHistogramMax: 12, EmptinessCheckTime: 13.0ms, AutomataDifference: 216945.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 89984.9ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 74 SDtfs, 341 SDslu, 328 SDs, 0 SdLazy, 797 SolverSat, 402 SolverUnsat, 3 SolverUnknown, 0 SolverNotchecked, 59730.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 712 GetRequests, 515 SyntacticMatches, 8 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2711 ImplicationChecksByTransitivity, 372824.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=5, InterpolantAutomatonStates: 97, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 64.5ms AutomataMinimizationTime, 6 MinimizatonAttempts, 23 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 5 LocationsWithAnnotation, 5 PreInvPairs, 26 NumberOfFragments, 1083 HoareAnnotationTreeSize, 5 FomulaSimplifications, 825 FormulaSimplificationTreeSizeReduction, 223.4ms HoareSimplificationTime, 5 FomulaSimplificationsInter, 4042 FormulaSimplificationTreeSizeReductionInter, 89755.1ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 120.5ms SsaConstructionTime, 29904.4ms SatisfiabilityAnalysisTime, 343655.4ms InterpolantComputationTime, 333 NumberOfCodeBlocks, 333 NumberOfCodeBlocksAsserted, 50 NumberOfCheckSat, 638 ConstructedInterpolants, 9 QuantifiedInterpolants, 11199 SizeOfPredicates, 66 NumberOfNonLiveVariables, 931 ConjunctsInSsa, 188 ConjunctsInUnsatCore, 28 InterpolantComputations, 4 PerfectInterpolantSequences, 525/1428 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 3 specifications checked. All of them hold - InvariantResult [Line: 31]: Loop Invariant Derived loop invariant: (((((((((((cond == 1bv32 && y == ~bvadd16(~bvmul64(4bv64, ~sign_extendFrom8To32(1bv32)), ~sign_extendFrom8To32(0bv32))) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && (~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y) || ~bvslt64(c, ~sign_extendFrom8To32(~sign_extendFrom8To32(k))))) && c == ~bvadd16(~bvmul64(4bv64, ~sign_extendFrom8To32(1bv32)), ~sign_extendFrom8To32(0bv32))) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32)) || ((((((~sign_extendFrom8To32(0bv32) == y && ~sign_extendFrom8To32(0bv32) == c) && ~sign_extendFrom8To32(0bv32) == x) && cond == 1bv32) && ~bvsge32(~sign_extendFrom8To32(k), 0bv32)) && cond == 1bv32) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32))) || (((((((cond == 1bv32 && y == ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(3bv64, ~sign_extendFrom8To32(1bv32)))) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && c == ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(3bv64, ~sign_extendFrom8To32(1bv32)))) && (~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y) || ~bvslt64(c, ~sign_extendFrom8To32(~sign_extendFrom8To32(k))))) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32))) || (((((((y == ~bvadd16(~sign_extendFrom8To32(0bv32), ~sign_extendFrom8To32(1bv32)) && cond == 1bv32) && c == ~bvadd16(~sign_extendFrom8To32(0bv32), ~sign_extendFrom8To32(1bv32))) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && ~bvslt64(~sign_extendFrom8To32(0bv32), ~sign_extendFrom8To32(~sign_extendFrom8To32(k)))) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32))) || (((((((cond == 1bv32 && ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(2bv64, ~sign_extendFrom8To32(1bv32))) == c) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && (~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y) || ~bvslt64(c, ~sign_extendFrom8To32(~sign_extendFrom8To32(k))))) && ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(2bv64, ~sign_extendFrom8To32(1bv32))) == y) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32))) || ((((((c == ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(5bv64, ~sign_extendFrom8To32(1bv32))) && cond == 1bv32) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && y == ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(5bv64, ~sign_extendFrom8To32(1bv32)))) && ~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y)) - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: (((((((((((cond == 1bv32 && y == ~bvadd16(~bvmul64(4bv64, ~sign_extendFrom8To32(1bv32)), ~sign_extendFrom8To32(0bv32))) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && (~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y) || ~bvslt64(c, ~sign_extendFrom8To32(~sign_extendFrom8To32(k))))) && c == ~bvadd16(~bvmul64(4bv64, ~sign_extendFrom8To32(1bv32)), ~sign_extendFrom8To32(0bv32))) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32)) || (((((((cond == 1bv32 && y == ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(3bv64, ~sign_extendFrom8To32(1bv32)))) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && c == ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(3bv64, ~sign_extendFrom8To32(1bv32)))) && (~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y) || ~bvslt64(c, ~sign_extendFrom8To32(~sign_extendFrom8To32(k))))) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32))) || (((((~sign_extendFrom8To32(0bv32) == y && ~sign_extendFrom8To32(0bv32) == c) && ~sign_extendFrom8To32(0bv32) == x) && cond == 1bv32) && ~bvsge32(~sign_extendFrom8To32(k), 0bv32)) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32))) || (((((((y == ~bvadd16(~sign_extendFrom8To32(0bv32), ~sign_extendFrom8To32(1bv32)) && cond == 1bv32) && c == ~bvadd16(~sign_extendFrom8To32(0bv32), ~sign_extendFrom8To32(1bv32))) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && ~bvslt64(~sign_extendFrom8To32(0bv32), ~sign_extendFrom8To32(~sign_extendFrom8To32(k)))) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32))) || (((((((cond == 1bv32 && ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(2bv64, ~sign_extendFrom8To32(1bv32))) == c) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && (~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y) || ~bvslt64(c, ~sign_extendFrom8To32(~sign_extendFrom8To32(k))))) && ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(2bv64, ~sign_extendFrom8To32(1bv32))) == y) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32))) || ((((((c == ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(5bv64, ~sign_extendFrom8To32(1bv32))) && cond == 1bv32) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && (cond == 1bv32 || cond == 0bv32)) && cond == 1bv32) && y == ~bvadd16(~sign_extendFrom8To32(0bv32), ~bvmul64(5bv64, ~sign_extendFrom8To32(1bv32)))) && ~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y)) - InvariantResult [Line: 9]: Loop Invariant Derived loop invariant: ((~sign_extendFrom8To32(0bv32) == y && ~sign_extendFrom8To32(0bv32) == x) && cond == 1bv32) || ((((((cond == 1bv32 && ~bvsge32(~sign_extendFrom8To32(k), 0bv32)) && ~sign_extendFrom8To32(0bv32) == ~bvadd16(~bvmul64(~sign_extendFrom8To32(4294967294bv32), y, y, y, y, y, y), ~bvmul64(~sign_extendFrom8To32(12bv32), x), ~bvmul64(y, y), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(5bv32), y), y), y), y)), ~bvneg32(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~bvmul64(~sign_extendFrom8To32(6bv32), y), y), y), y), y)))) && cond == 1bv32) && ~bvmul64(y, y) == ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y)) && ((!~bvslt64(c, ~sign_extendFrom8To32(~sign_extendFrom8To32(k))) || ~bvadd16(~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), ~sign_extendFrom8To32(1bv32)), ~bvmul64(~sign_extendFrom8To32(~sign_extendFrom8To32(k)), y)) == ~bvadd16(~bvmul64(y, y), ~bvmul64(2bv64, ~bvmul64(~sign_extendFrom8To32(1bv32), y)), ~bvmul64(~sign_extendFrom8To32(1bv32), ~sign_extendFrom8To32(1bv32)))) || ~bvslt64(~bvadd16(~sign_extendFrom8To32(1bv32), c), ~sign_extendFrom8To32(~sign_extendFrom8To32(k))))) && ~bvsle32(~sign_extendFrom8To32(k), 5bv32)) RESULT: Ultimate proved your program to be correct! [2021-10-13 07:26:03,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2b0b8048-2480-4fe1-b446-86b79413cca0/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...