./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/gcd_4.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 57096758 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c20edfd7ede05443471560aa2c7be34d4e8c171 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/gcd_4.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9c20edfd7ede05443471560aa2c7be34d4e8c171 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:03:14,167 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:03:14,171 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:03:14,231 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:03:14,232 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:03:14,237 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:03:14,239 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:03:14,243 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:03:14,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:03:14,252 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:03:14,254 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:03:14,256 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:03:14,256 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:03:14,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:03:14,261 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:03:14,268 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:03:14,271 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:03:14,273 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:03:14,275 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:03:14,286 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:03:14,289 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:03:14,290 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:03:14,294 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:03:14,295 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:03:14,301 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:03:14,302 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:03:14,302 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:03:14,304 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:03:14,305 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:03:14,306 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:03:14,307 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:03:14,308 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:03:14,309 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:03:14,311 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:03:14,312 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:03:14,313 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:03:14,313 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:03:14,314 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:03:14,314 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:03:14,315 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:03:14,315 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:03:14,316 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-10-16 02:03:14,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:03:14,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:03:14,364 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:03:14,365 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:03:14,365 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:03:14,365 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:03:14,365 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-16 02:03:14,366 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:03:14,372 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:03:14,372 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-16 02:03:14,373 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-16 02:03:14,374 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:03:14,374 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-16 02:03:14,374 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-16 02:03:14,374 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-16 02:03:14,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:03:14,375 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:03:14,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-16 02:03:14,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:03:14,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:03:14,376 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:03:14,377 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:03:14,377 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:03:14,377 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:03:14,377 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:03:14,377 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:03:14,378 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:03:14,378 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:03:14,378 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:03:14,380 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:03:14,380 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:03:14,380 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:03:14,380 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:03:14,381 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:03:14,381 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-16 02:03:14,381 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-16 02:03:14,381 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:03:14,382 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:03:14,382 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:03:14,382 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_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2021-10-16 02:03:14,704 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:03:14,725 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:03:14,727 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:03:14,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:03:14,729 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:03:14,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/bitvector/gcd_4.c [2021-10-16 02:03:14,796 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data/99d6dfe72/7e7c8d8f4e4e44159163a8bafee6f2eb/FLAGc6d5448ca [2021-10-16 02:03:15,326 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:03:15,328 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/sv-benchmarks/c/bitvector/gcd_4.c [2021-10-16 02:03:15,338 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data/99d6dfe72/7e7c8d8f4e4e44159163a8bafee6f2eb/FLAGc6d5448ca [2021-10-16 02:03:15,710 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data/99d6dfe72/7e7c8d8f4e4e44159163a8bafee6f2eb [2021-10-16 02:03:15,712 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:03:15,714 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:03:15,716 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:03:15,716 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:03:15,721 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:03:15,722 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:03:15" (1/1) ... [2021-10-16 02:03:15,723 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2dc477d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:15, skipping insertion in model container [2021-10-16 02:03:15,723 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:03:15" (1/1) ... [2021-10-16 02:03:15,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:03:15,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:03:15,954 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_e4262555-a59e-464b-9523-91231273314f/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-16 02:03:15,975 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:03:15,984 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:03:15,997 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_e4262555-a59e-464b-9523-91231273314f/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-16 02:03:16,002 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:03:16,015 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:03:16,016 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16 WrapperNode [2021-10-16 02:03:16,016 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:03:16,017 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:03:16,018 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:03:16,018 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:03:16,025 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,050 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:03:16,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:03:16,052 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:03:16,052 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:03:16,060 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,060 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,062 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,062 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,066 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,071 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,073 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:03:16,074 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:03:16,074 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:03:16,075 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:03:16,078 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (1/1) ... [2021-10-16 02:03:16,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:03:16,096 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:03:16,121 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:03:16,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:03:16,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-16 02:03:16,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:03:16,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:03:16,174 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:03:16,598 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:03:16,598 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:03:16,601 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:03:16 BoogieIcfgContainer [2021-10-16 02:03:16,601 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:03:16,603 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:03:16,603 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:03:16,608 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:03:16,608 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:03:15" (1/3) ... [2021-10-16 02:03:16,609 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e768d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:03:16, skipping insertion in model container [2021-10-16 02:03:16,609 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:16" (2/3) ... [2021-10-16 02:03:16,610 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e768d25 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:03:16, skipping insertion in model container [2021-10-16 02:03:16,610 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:03:16" (3/3) ... [2021-10-16 02:03:16,611 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2021-10-16 02:03:16,621 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:03:16,621 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 02:03:16,680 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:03:16,690 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:03:16,690 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 02:03:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:16,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-16 02:03:16,713 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:03:16,714 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-16 02:03:16,715 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:03:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:03:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash 109521743, now seen corresponding path program 1 times [2021-10-16 02:03:16,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:03:16,737 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620430256] [2021-10-16 02:03:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:16,739 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:03:16,846 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:03:16,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281194137] [2021-10-16 02:03:16,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:16,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:03:16,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:03:16,849 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:03:16,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-16 02:03:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:03:16,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:17,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:17,061 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:17,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:17,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:03:17,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620430256] [2021-10-16 02:03:17,113 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:03:17,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281194137] [2021-10-16 02:03:17,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281194137] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:03:17,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:03:17,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:03:17,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573266776] [2021-10-16 02:03:17,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:03:17,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:03:17,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:03:17,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:17,143 INFO L87 Difference]: Start difference. First operand has 17 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:17,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:03:17,191 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-10-16 02:03:17,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:03:17,196 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-16 02:03:17,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:03:17,204 INFO L225 Difference]: With dead ends: 46 [2021-10-16 02:03:17,205 INFO L226 Difference]: Without dead ends: 28 [2021-10-16 02:03:17,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.2ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:17,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-16 02:03:17,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 15. [2021-10-16 02:03:17,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:17,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-16 02:03:17,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2021-10-16 02:03:17,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:03:17,242 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-16 02:03:17,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:17,243 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-16 02:03:17,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-16 02:03:17,243 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:03:17,244 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-16 02:03:17,277 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:03:17,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:03:17,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:03:17,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:03:17,470 INFO L82 PathProgramCache]: Analyzing trace with hash -896668108, now seen corresponding path program 1 times [2021-10-16 02:03:17,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:03:17,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080069802] [2021-10-16 02:03:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:17,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:03:17,495 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:03:17,495 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1820132811] [2021-10-16 02:03:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:17,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:03:17,496 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:03:17,499 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:03:17,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-16 02:03:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:17,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:03:17,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:17,614 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:17,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:17,648 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:03:17,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080069802] [2021-10-16 02:03:17,649 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:03:17,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820132811] [2021-10-16 02:03:17,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820132811] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:03:17,650 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:03:17,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-16 02:03:17,650 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376934253] [2021-10-16 02:03:17,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:03:17,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-16 02:03:17,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:03:17,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:17,652 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-10-16 02:03:17,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:03:17,664 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-10-16 02:03:17,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:03:17,666 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 6 [2021-10-16 02:03:17,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:03:17,666 INFO L225 Difference]: With dead ends: 28 [2021-10-16 02:03:17,667 INFO L226 Difference]: Without dead ends: 16 [2021-10-16 02:03:17,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:17,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-16 02:03:17,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-16 02:03:17,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-16 02:03:17,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 6 [2021-10-16 02:03:17,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:03:17,675 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-16 02:03:17,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2021-10-16 02:03:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-16 02:03:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-16 02:03:17,676 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:03:17,676 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:03:17,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:03:17,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:03:17,893 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:03:17,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:03:17,894 INFO L82 PathProgramCache]: Analyzing trace with hash -2027476501, now seen corresponding path program 1 times [2021-10-16 02:03:17,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-16 02:03:17,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014560316] [2021-10-16 02:03:17,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:17,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-16 02:03:17,911 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-10-16 02:03:17,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [32585199] [2021-10-16 02:03:17,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:17,911 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:03:17,912 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:03:17,912 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:03:17,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-16 02:03:17,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:03:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:18,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:18,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:18,155 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-16 02:03:18,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014560316] [2021-10-16 02:03:18,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2021-10-16 02:03:18,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32585199] [2021-10-16 02:03:18,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32585199] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:03:18,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [78592518] [2021-10-16 02:03:18,176 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-16 02:03:18,176 INFO L166 IcfgInterpreter]: Building call graph [2021-10-16 02:03:18,180 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-16 02:03:18,185 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-16 02:03:18,186 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-16 02:03:18,216 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,220 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:03:18,221 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,221 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-16 02:03:18,224 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-16 02:03:18,225 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,226 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-10-16 02:03:18,229 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 165 [2021-10-16 02:03:18,262 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:03:18,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:03:18,264 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,265 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:03:18,265 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,265 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:03:18,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-16 02:03:18,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:03:18,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:03:18,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-16 02:03:18,343 INFO L354 Elim1Store]: treesize reduction 68, result has 13.9 percent of original size [2021-10-16 02:03:18,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 4 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 7 case distinctions, treesize of input 43 treesize of output 42 [2021-10-16 02:03:18,345 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,348 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:03:18,349 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,350 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-10-16 02:03:18,350 INFO L550 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2021-10-16 02:03:18,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:03:18,357 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:03:18,357 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,358 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:03:18,358 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,359 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:03:18,359 INFO L550 ElimStorePlain]: Start of recursive call 4: End of recursive call: and 1 xjuncts. [2021-10-16 02:03:18,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:03:18,370 INFO L173 IndexEqualityManager]: detected equality via solver [2021-10-16 02:03:18,373 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,373 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:03:18,374 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,374 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-10-16 02:03:18,374 INFO L550 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2021-10-16 02:03:18,376 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:03:18,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,471 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-16 02:03:18,476 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 126 [2021-10-16 02:03:18,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-16 02:03:18,478 INFO L247 ElimStorePlain]: Needed 5 recursive calls to eliminate 1 variables, input treesize:569, output treesize:126 [2021-10-16 02:03:18,516 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-16 02:03:18,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:03:18,701 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_17| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-16 02:03:18,705 INFO L168 Benchmark]: Toolchain (without parser) took 2990.69 ms. Allocated memory was 81.8 MB in the beginning and 111.1 MB in the end (delta: 29.4 MB). Free memory was 43.3 MB in the beginning and 59.8 MB in the end (delta: -16.5 MB). Peak memory consumption was 13.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:03:18,705 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 81.8 MB. Free memory is still 59.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:03:18,706 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.22 ms. Allocated memory was 81.8 MB in the beginning and 111.1 MB in the end (delta: 29.4 MB). Free memory was 43.1 MB in the beginning and 88.0 MB in the end (delta: -44.8 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. [2021-10-16 02:03:18,707 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.38 ms. Allocated memory is still 111.1 MB. Free memory was 87.6 MB in the beginning and 86.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:03:18,707 INFO L168 Benchmark]: Boogie Preprocessor took 21.98 ms. Allocated memory is still 111.1 MB. Free memory was 86.3 MB in the beginning and 85.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:03:18,708 INFO L168 Benchmark]: RCFGBuilder took 527.14 ms. Allocated memory is still 111.1 MB. Free memory was 85.1 MB in the beginning and 72.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-16 02:03:18,709 INFO L168 Benchmark]: TraceAbstraction took 2100.73 ms. Allocated memory is still 111.1 MB. Free memory was 71.2 MB in the beginning and 59.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. [2021-10-16 02:03:18,712 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 81.8 MB. Free memory is still 59.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 300.22 ms. Allocated memory was 81.8 MB in the beginning and 111.1 MB in the end (delta: 29.4 MB). Free memory was 43.1 MB in the beginning and 88.0 MB in the end (delta: -44.8 MB). Peak memory consumption was 8.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.38 ms. Allocated memory is still 111.1 MB. Free memory was 87.6 MB in the beginning and 86.3 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 21.98 ms. Allocated memory is still 111.1 MB. Free memory was 86.3 MB in the beginning and 85.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 527.14 ms. Allocated memory is still 111.1 MB. Free memory was 85.1 MB in the beginning and 72.0 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2100.73 ms. Allocated memory is still 111.1 MB. Free memory was 71.2 MB in the beginning and 59.8 MB in the end (delta: 11.4 MB). Peak memory consumption was 13.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_17| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_17|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-16 02:03:18,779 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-5709675 [2021-10-16 02:03:21,250 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-16 02:03:21,252 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-16 02:03:21,297 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-16 02:03:21,297 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-16 02:03:21,303 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-16 02:03:21,309 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-16 02:03:21,313 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-16 02:03:21,317 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-16 02:03:21,324 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-16 02:03:21,325 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-16 02:03:21,326 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-16 02:03:21,327 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-16 02:03:21,328 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-16 02:03:21,329 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-16 02:03:21,330 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-16 02:03:21,331 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-16 02:03:21,332 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-16 02:03:21,334 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-16 02:03:21,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-16 02:03:21,347 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-16 02:03:21,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-16 02:03:21,356 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-16 02:03:21,357 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-16 02:03:21,360 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-16 02:03:21,361 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-16 02:03:21,361 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-16 02:03:21,362 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-16 02:03:21,362 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-16 02:03:21,364 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-16 02:03:21,364 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-16 02:03:21,369 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-16 02:03:21,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-16 02:03:21,371 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-16 02:03:21,373 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-16 02:03:21,373 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-16 02:03:21,380 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-16 02:03:21,380 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-16 02:03:21,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-16 02:03:21,382 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-16 02:03:21,383 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-16 02:03:21,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-10-16 02:03:21,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-16 02:03:21,434 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-16 02:03:21,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-16 02:03:21,435 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-16 02:03:21,435 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-16 02:03:21,436 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-16 02:03:21,436 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-16 02:03:21,436 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-16 02:03:21,436 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-16 02:03:21,438 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-16 02:03:21,439 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-16 02:03:21,439 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-16 02:03:21,439 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-16 02:03:21,439 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-16 02:03:21,439 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-16 02:03:21,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-16 02:03:21,440 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-16 02:03:21,440 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-16 02:03:21,440 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-16 02:03:21,441 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-16 02:03:21,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-16 02:03:21,441 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-16 02:03:21,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-16 02:03:21,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-16 02:03:21,442 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-16 02:03:21,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-16 02:03:21,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:03:21,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-16 02:03:21,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-16 02:03:21,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-16 02:03:21,443 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-16 02:03:21,443 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-16 02:03:21,443 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-16 02:03:21,444 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-16 02:03:21,444 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-16 02:03:21,444 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_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9c20edfd7ede05443471560aa2c7be34d4e8c171 [2021-10-16 02:03:21,828 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-16 02:03:21,859 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-16 02:03:21,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-16 02:03:21,863 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-16 02:03:21,864 INFO L275 PluginConnector]: CDTParser initialized [2021-10-16 02:03:21,864 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/../../sv-benchmarks/c/bitvector/gcd_4.c [2021-10-16 02:03:21,924 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data/ef6940c68/744c11b130db4ab19f78012a85b21dbe/FLAG6ea947aef [2021-10-16 02:03:22,396 INFO L306 CDTParser]: Found 1 translation units. [2021-10-16 02:03:22,397 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/sv-benchmarks/c/bitvector/gcd_4.c [2021-10-16 02:03:22,414 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data/ef6940c68/744c11b130db4ab19f78012a85b21dbe/FLAG6ea947aef [2021-10-16 02:03:22,797 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/data/ef6940c68/744c11b130db4ab19f78012a85b21dbe [2021-10-16 02:03:22,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-16 02:03:22,803 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-16 02:03:22,805 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-16 02:03:22,805 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-16 02:03:22,808 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-16 02:03:22,809 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:03:22" (1/1) ... [2021-10-16 02:03:22,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e26c2a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:22, skipping insertion in model container [2021-10-16 02:03:22,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 02:03:22" (1/1) ... [2021-10-16 02:03:22,820 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-16 02:03:22,836 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-16 02:03:23,001 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_e4262555-a59e-464b-9523-91231273314f/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-16 02:03:23,021 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:03:23,035 INFO L203 MainTranslator]: Completed pre-run [2021-10-16 02:03:23,067 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_e4262555-a59e-464b-9523-91231273314f/sv-benchmarks/c/bitvector/gcd_4.c[357,370] [2021-10-16 02:03:23,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-16 02:03:23,089 INFO L208 MainTranslator]: Completed translation [2021-10-16 02:03:23,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23 WrapperNode [2021-10-16 02:03:23,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-16 02:03:23,092 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-16 02:03:23,092 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-16 02:03:23,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-16 02:03:23,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,137 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-16 02:03:23,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-16 02:03:23,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-16 02:03:23,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-16 02:03:23,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,187 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,188 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,193 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,210 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,212 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-16 02:03:23,219 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-16 02:03:23,219 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-16 02:03:23,219 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-16 02:03:23,220 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (1/1) ... [2021-10-16 02:03:23,227 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-16 02:03:23,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:03:23,254 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-16 02:03:23,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-16 02:03:23,304 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-16 02:03:23,304 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-16 02:03:23,304 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-16 02:03:23,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-16 02:03:23,655 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-16 02:03:23,656 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-10-16 02:03:23,657 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:03:23 BoogieIcfgContainer [2021-10-16 02:03:23,658 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-16 02:03:23,659 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-16 02:03:23,659 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-16 02:03:23,662 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-16 02:03:23,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 02:03:22" (1/3) ... [2021-10-16 02:03:23,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6699f137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:03:23, skipping insertion in model container [2021-10-16 02:03:23,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 02:03:23" (2/3) ... [2021-10-16 02:03:23,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6699f137 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 02:03:23, skipping insertion in model container [2021-10-16 02:03:23,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:03:23" (3/3) ... [2021-10-16 02:03:23,680 INFO L111 eAbstractionObserver]: Analyzing ICFG gcd_4.c [2021-10-16 02:03:23,684 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-16 02:03:23,685 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-16 02:03:23,762 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-16 02:03:23,774 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-16 02:03:23,774 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-16 02:03:23,790 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:23,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-16 02:03:23,795 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:03:23,796 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:03:23,797 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:03:23,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:03:23,805 INFO L82 PathProgramCache]: Analyzing trace with hash 121403650, now seen corresponding path program 1 times [2021-10-16 02:03:23,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:03:23,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2051907115] [2021-10-16 02:03:23,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:23,819 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:03:23,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:03:23,824 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:03:23,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-16 02:03:23,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:23,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:03:23,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:24,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:24,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:24,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:24,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:03:24,156 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2051907115] [2021-10-16 02:03:24,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2051907115] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:03:24,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:03:24,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:03:24,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843836109] [2021-10-16 02:03:24,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:03:24,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:03:24,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:03:24,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:24,183 INFO L87 Difference]: Start difference. First operand has 24 states, 20 states have (on average 1.6) internal successors, (32), 23 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:24,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:03:24,238 INFO L93 Difference]: Finished difference Result 64 states and 84 transitions. [2021-10-16 02:03:24,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-16 02:03:24,240 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-10-16 02:03:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:03:24,249 INFO L225 Difference]: With dead ends: 64 [2021-10-16 02:03:24,249 INFO L226 Difference]: Without dead ends: 35 [2021-10-16 02:03:24,252 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:24,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-16 02:03:24,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 20. [2021-10-16 02:03:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-10-16 02:03:24,290 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 8 [2021-10-16 02:03:24,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:03:24,291 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-10-16 02:03:24,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-10-16 02:03:24,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-16 02:03:24,292 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:03:24,292 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:03:24,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-16 02:03:24,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:03:24,514 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:03:24,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:03:24,515 INFO L82 PathProgramCache]: Analyzing trace with hash -60379342, now seen corresponding path program 1 times [2021-10-16 02:03:24,516 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:03:24,516 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1902629250] [2021-10-16 02:03:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:24,517 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:03:24,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:03:24,522 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:03:24,523 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-16 02:03:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:24,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-16 02:03:24,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:24,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:24,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:24,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:03:24,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1902629250] [2021-10-16 02:03:24,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1902629250] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:03:24,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:03:24,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:03:24,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602689736] [2021-10-16 02:03:24,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:03:24,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:03:24,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:03:24,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:24,782 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-10-16 02:03:24,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:03:24,820 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-10-16 02:03:24,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:03:24,821 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) Word has length 10 [2021-10-16 02:03:24,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:03:24,822 INFO L225 Difference]: With dead ends: 38 [2021-10-16 02:03:24,822 INFO L226 Difference]: Without dead ends: 22 [2021-10-16 02:03:24,823 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:24,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-16 02:03:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-16 02:03:24,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.263157894736842) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:24,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-16 02:03:24,827 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2021-10-16 02:03:24,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:03:24,828 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-16 02:03:24,828 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 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) [2021-10-16 02:03:24,828 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-16 02:03:24,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-16 02:03:24,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:03:24,841 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:03:24,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-16 02:03:25,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:03:25,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:03:25,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:03:25,055 INFO L82 PathProgramCache]: Analyzing trace with hash 108865487, now seen corresponding path program 1 times [2021-10-16 02:03:25,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:03:25,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1127366839] [2021-10-16 02:03:25,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:25,056 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:03:25,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:03:25,059 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:03:25,062 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-16 02:03:25,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-16 02:03:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:25,345 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:25,349 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:25,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:25,414 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:03:25,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1127366839] [2021-10-16 02:03:25,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1127366839] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-16 02:03:25,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-16 02:03:25,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-10-16 02:03:25,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23905962] [2021-10-16 02:03:25,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-16 02:03:25,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:03:25,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-16 02:03:25,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:25,418 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-16 02:03:25,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:03:25,455 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2021-10-16 02:03:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-16 02:03:25,456 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) Word has length 12 [2021-10-16 02:03:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:03:25,457 INFO L225 Difference]: With dead ends: 41 [2021-10-16 02:03:25,457 INFO L226 Difference]: Without dead ends: 26 [2021-10-16 02:03:25,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-16 02:03:25,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-16 02:03:25,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-16 02:03:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 25 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) [2021-10-16 02:03:25,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-10-16 02:03:25,463 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 12 [2021-10-16 02:03:25,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:03:25,463 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-10-16 02:03:25,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-16 02:03:25,463 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-10-16 02:03:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-16 02:03:25,464 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:03:25,464 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:03:25,477 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-10-16 02:03:25,676 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:03:25,677 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:03:25,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:03:25,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1930473527, now seen corresponding path program 1 times [2021-10-16 02:03:25,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:03:25,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [625998700] [2021-10-16 02:03:25,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:25,679 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:03:25,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:03:25,680 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:03:25,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-16 02:03:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:25,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:03:25,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:25,949 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:25,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:26,154 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:26,156 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:03:26,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [625998700] [2021-10-16 02:03:26,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [625998700] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:03:26,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [151262204] [2021-10-16 02:03:26,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:26,158 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:03:26,158 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:03:26,162 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:03:26,192 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-16 02:03:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:26,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-16 02:03:26,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:26,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:26,497 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:26,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:26,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [151262204] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:03:26,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583612459] [2021-10-16 02:03:26,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:03:26,619 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:03:26,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:03:26,625 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:03:26,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-16 02:03:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:03:26,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-16 02:03:26,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:26,947 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:26,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:27,352 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:03:27,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583612459] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:03:27,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:03:27,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 6, 6] total 13 [2021-10-16 02:03:27,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150822114] [2021-10-16 02:03:27,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-16 02:03:27,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:03:27,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-16 02:03:27,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-10-16 02:03:27,355 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:27,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:03:27,644 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2021-10-16 02:03:27,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-16 02:03:27,646 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-16 02:03:27,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:03:27,648 INFO L225 Difference]: With dead ends: 50 [2021-10-16 02:03:27,649 INFO L226 Difference]: Without dead ends: 35 [2021-10-16 02:03:27,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 634.8ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-10-16 02:03:27,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-16 02:03:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 33. [2021-10-16 02:03:27,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2021-10-16 02:03:27,656 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 16 [2021-10-16 02:03:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:03:27,656 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2021-10-16 02:03:27,656 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:03:27,657 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2021-10-16 02:03:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-16 02:03:27,658 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:03:27,658 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:03:27,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-16 02:03:27,890 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-16 02:03:28,071 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (6)] Ended with exit code 0 [2021-10-16 02:03:28,270 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:03:28,270 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:03:28,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:03:28,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1921301375, now seen corresponding path program 2 times [2021-10-16 02:03:28,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:03:28,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [564199113] [2021-10-16 02:03:28,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:03:28,272 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:03:28,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:03:28,273 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:03:28,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-16 02:03:28,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:03:28,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:03:28,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:03:28,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:03:28,759 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:03:32,680 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:03:32,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [564199113] [2021-10-16 02:03:32,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [564199113] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:03:32,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1270322982] [2021-10-16 02:03:32,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:03:32,681 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:03:32,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:03:32,685 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:03:32,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-10-16 02:03:32,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:03:32,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:03:32,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:03:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:33,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:03:33,241 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:03:34,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1270322982] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:03:34,315 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443758140] [2021-10-16 02:03:34,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-16 02:03:34,315 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:03:34,316 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:03:34,316 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:03:34,317 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-16 02:03:34,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-16 02:03:34,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:03:34,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-16 02:03:34,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:03:34,737 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:03:34,737 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:03:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:03:43,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443758140] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:03:43,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:03:43,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 10] total 19 [2021-10-16 02:03:43,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470916776] [2021-10-16 02:03:43,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-16 02:03:43,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:03:43,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-16 02:03:43,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-10-16 02:03:43,029 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:04:05,742 WARN L207 SmtUtils]: Spent 16.15 s on a formula simplification that was a NOOP. DAG size: 29 [2021-10-16 02:04:48,037 WARN L207 SmtUtils]: Spent 5.76 s on a formula simplification that was a NOOP. DAG size: 21 [2021-10-16 02:05:01,992 WARN L207 SmtUtils]: Spent 7.30 s on a formula simplification that was a NOOP. DAG size: 24 [2021-10-16 02:05:14,052 WARN L207 SmtUtils]: Spent 8.94 s on a formula simplification that was a NOOP. DAG size: 27 [2021-10-16 02:05:31,305 WARN L207 SmtUtils]: Spent 10.78 s on a formula simplification that was a NOOP. DAG size: 27 [2021-10-16 02:05:31,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:05:31,308 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2021-10-16 02:05:31,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-16 02:05:31,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 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 20 [2021-10-16 02:05:31,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:05:31,310 INFO L225 Difference]: With dead ends: 68 [2021-10-16 02:05:31,310 INFO L226 Difference]: Without dead ends: 66 [2021-10-16 02:05:31,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 101156.5ms TimeCoverageRelationStatistics Valid=265, Invalid=723, Unknown=4, NotChecked=0, Total=992 [2021-10-16 02:05:31,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-16 02:05:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 45. [2021-10-16 02:05:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.2857142857142858) internal successors, (54), 44 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2021-10-16 02:05:31,321 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 20 [2021-10-16 02:05:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:05:31,321 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2021-10-16 02:05:31,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:05:31,322 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2021-10-16 02:05:31,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:05:31,323 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:05:31,323 INFO L512 BasicCegarLoop]: trace histogram [5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:05:31,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-10-16 02:05:31,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:31,740 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-10-16 02:05:31,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:05:31,938 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:05:31,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:05:31,939 INFO L82 PathProgramCache]: Analyzing trace with hash 465472356, now seen corresponding path program 1 times [2021-10-16 02:05:31,939 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:05:31,939 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [223463762] [2021-10-16 02:05:31,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:31,939 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:05:31,940 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:05:31,942 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:05:31,944 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-10-16 02:05:32,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:32,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-16 02:05:32,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:32,907 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:05:32,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:39,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:05:39,695 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:05:39,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [223463762] [2021-10-16 02:05:39,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [223463762] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:05:39,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1716718434] [2021-10-16 02:05:39,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:39,696 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:05:39,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:05:39,713 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:05:39,720 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-10-16 02:05:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:40,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:05:40,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:41,330 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:05:41,330 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:05:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:05:42,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1716718434] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:05:42,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870639493] [2021-10-16 02:05:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-16 02:05:42,780 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:05:42,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:05:42,782 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:05:42,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-16 02:05:43,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-16 02:05:43,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-16 02:05:43,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:05:43,663 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:05:43,663 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:06:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-10-16 02:06:15,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [870639493] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:06:15,087 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:06:15,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 10, 12] total 30 [2021-10-16 02:06:15,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462333985] [2021-10-16 02:06:15,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-16 02:06:15,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:06:15,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-16 02:06:15,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-10-16 02:06:15,092 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:06:31,514 WARN L207 SmtUtils]: Spent 6.57 s on a formula simplification that was a NOOP. DAG size: 40 [2021-10-16 02:07:23,832 WARN L207 SmtUtils]: Spent 10.74 s on a formula simplification that was a NOOP. DAG size: 21 [2021-10-16 02:07:40,033 WARN L207 SmtUtils]: Spent 7.83 s on a formula simplification that was a NOOP. DAG size: 24 [2021-10-16 02:07:56,703 WARN L207 SmtUtils]: Spent 11.89 s on a formula simplification that was a NOOP. DAG size: 27 [2021-10-16 02:08:07,816 WARN L207 SmtUtils]: Spent 5.37 s on a formula simplification that was a NOOP. DAG size: 44 [2021-10-16 02:08:25,492 WARN L207 SmtUtils]: Spent 13.67 s on a formula simplification that was a NOOP. DAG size: 30 [2021-10-16 02:08:43,166 WARN L207 SmtUtils]: Spent 9.42 s on a formula simplification that was a NOOP. DAG size: 51 [2021-10-16 02:08:59,861 WARN L207 SmtUtils]: Spent 10.70 s on a formula simplification that was a NOOP. DAG size: 30 [2021-10-16 02:09:20,226 WARN L207 SmtUtils]: Spent 12.12 s on a formula simplification that was a NOOP. DAG size: 57 [2021-10-16 02:09:44,543 WARN L207 SmtUtils]: Spent 13.38 s on a formula simplification that was a NOOP. DAG size: 57 [2021-10-16 02:10:08,836 WARN L207 SmtUtils]: Spent 16.48 s on a formula simplification that was a NOOP. DAG size: 57 [2021-10-16 02:10:33,153 WARN L207 SmtUtils]: Spent 15.06 s on a formula simplification that was a NOOP. DAG size: 54 [2021-10-16 02:10:33,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:33,155 INFO L93 Difference]: Finished difference Result 95 states and 114 transitions. [2021-10-16 02:10:33,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-16 02:10:33,155 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-10-16 02:10:33,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:33,157 INFO L225 Difference]: With dead ends: 95 [2021-10-16 02:10:33,157 INFO L226 Difference]: Without dead ends: 84 [2021-10-16 02:10:33,159 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 270300.8ms TimeCoverageRelationStatistics Valid=524, Invalid=2025, Unknown=1, NotChecked=0, Total=2550 [2021-10-16 02:10:33,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-16 02:10:33,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2021-10-16 02:10:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 63 states have (on average 1.3333333333333333) internal successors, (84), 65 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 84 transitions. [2021-10-16 02:10:33,174 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 84 transitions. Word has length 22 [2021-10-16 02:10:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:33,174 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 84 transitions. [2021-10-16 02:10:33,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.3666666666666667) internal successors, (71), 30 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:33,175 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 84 transitions. [2021-10-16 02:10:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-16 02:10:33,176 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:33,176 INFO L512 BasicCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:33,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-10-16 02:10:33,409 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:33,603 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:33,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:33,801 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:10:33,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:33,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1401524834, now seen corresponding path program 3 times [2021-10-16 02:10:33,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:33,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1364348951] [2021-10-16 02:10:33,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:10:33,802 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:33,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:33,803 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:33,804 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-16 02:10:34,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-16 02:10:34,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:10:34,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:10:34,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:34,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:34,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:35,660 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:35,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1364348951] [2021-10-16 02:10:35,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1364348951] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:35,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [508807073] [2021-10-16 02:10:35,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:10:35,661 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:35,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:10:35,661 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:10:35,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-16 02:10:36,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-16 02:10:36,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:10:36,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-16 02:10:36,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:36,716 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:36,716 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:36,921 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:36,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [508807073] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:36,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561127053] [2021-10-16 02:10:36,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-16 02:10:36,921 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:36,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:36,923 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:36,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-16 02:10:37,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-10-16 02:10:37,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:10:37,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-16 02:10:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:37,703 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-16 02:10:37,704 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:37,906 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-16 02:10:37,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561127053] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:37,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:10:37,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9, 9, 8, 9] total 17 [2021-10-16 02:10:37,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986035655] [2021-10-16 02:10:37,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-16 02:10:37,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:37,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-16 02:10:37,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-10-16 02:10:37,908 INFO L87 Difference]: Start difference. First operand 66 states and 84 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:39,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:39,640 INFO L93 Difference]: Finished difference Result 128 states and 163 transitions. [2021-10-16 02:10:39,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-16 02:10:39,642 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 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 22 [2021-10-16 02:10:39,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:39,643 INFO L225 Difference]: With dead ends: 128 [2021-10-16 02:10:39,643 INFO L226 Difference]: Without dead ends: 83 [2021-10-16 02:10:39,644 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 108 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2452.1ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-10-16 02:10:39,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-16 02:10:39,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2021-10-16 02:10:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 61 states have (on average 1.3442622950819672) internal successors, (82), 63 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) [2021-10-16 02:10:39,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 82 transitions. [2021-10-16 02:10:39,664 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 82 transitions. Word has length 22 [2021-10-16 02:10:39,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:39,664 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 82 transitions. [2021-10-16 02:10:39,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 17 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:39,665 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 82 transitions. [2021-10-16 02:10:39,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-16 02:10:39,666 INFO L504 BasicCegarLoop]: Found error trace [2021-10-16 02:10:39,666 INFO L512 BasicCegarLoop]: trace histogram [8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-16 02:10:39,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-10-16 02:10:39,903 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-10-16 02:10:40,091 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-16 02:10:40,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 [2021-10-16 02:10:40,283 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-16 02:10:40,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-16 02:10:40,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1162394260, now seen corresponding path program 4 times [2021-10-16 02:10:40,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-16 02:10:40,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [749613429] [2021-10-16 02:10:40,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:10:40,284 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-16 02:10:40,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat [2021-10-16 02:10:40,286 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-16 02:10:40,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-16 02:10:40,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:10:40,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:10:40,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:10:40,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:41,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:41,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-16 02:10:41,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [749613429] [2021-10-16 02:10:41,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [749613429] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:41,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1767656119] [2021-10-16 02:10:41,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:10:41,646 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:41,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 [2021-10-16 02:10:41,647 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-16 02:10:41,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-16 02:10:42,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:10:42,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:10:42,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-16 02:10:42,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:42,350 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:42,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:42,584 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 26 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-10-16 02:10:42,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1767656119] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:42,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475549360] [2021-10-16 02:10:42,584 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-16 02:10:42,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-16 02:10:42,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 [2021-10-16 02:10:42,585 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-16 02:10:42,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-16 02:10:42,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-16 02:10:42,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-16 02:10:42,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-16 02:10:42,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-16 02:10:43,313 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:10:43,313 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-16 02:10:51,178 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-10-16 02:10:51,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475549360] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-16 02:10:51,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-16 02:10:51,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 10] total 20 [2021-10-16 02:10:51,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937909772] [2021-10-16 02:10:51,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-16 02:10:51,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-16 02:10:51,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-16 02:10:51,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=280, Unknown=1, NotChecked=0, Total=380 [2021-10-16 02:10:51,182 INFO L87 Difference]: Start difference. First operand 64 states and 82 transitions. Second operand has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-16 02:10:51,712 INFO L93 Difference]: Finished difference Result 64 states and 82 transitions. [2021-10-16 02:10:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-16 02:10:51,712 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 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 [2021-10-16 02:10:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-16 02:10:51,712 INFO L225 Difference]: With dead ends: 64 [2021-10-16 02:10:51,712 INFO L226 Difference]: Without dead ends: 0 [2021-10-16 02:10:51,713 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 131 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 7308.0ms TimeCoverageRelationStatistics Valid=109, Invalid=310, Unknown=1, NotChecked=0, Total=420 [2021-10-16 02:10:51,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-16 02:10:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-16 02:10:51,714 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) [2021-10-16 02:10:51,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-16 02:10:51,714 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 26 [2021-10-16 02:10:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-16 02:10:51,715 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-16 02:10:51,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.7) internal successors, (54), 20 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-16 02:10:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-16 02:10:51,715 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-16 02:10:51,718 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:10:51,719 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:10:51,719 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-10-16 02:10:51,754 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:51,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-10-16 02:10:52,147 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt (18)] Ended with exit code 0 [2021-10-16 02:10:52,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/mathsat -unsat_core_generation=3,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/cvc4 --incremental --print-success --lang smt [2021-10-16 02:10:52,347 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-16 02:10:52,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:10:52,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:10:52,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:10:52,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:10:52,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:10:52,465 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-16 02:11:10,744 WARN L207 SmtUtils]: Spent 5.31 s on a formula simplification. DAG size of input: 114 DAG size of output: 41 [2021-10-16 02:11:10,746 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-16 02:11:10,746 INFO L857 garLoopResultBuilder]: For program point L15-1(lines 13 29) no Hoare annotation was computed. [2021-10-16 02:11:10,747 INFO L857 garLoopResultBuilder]: For program point L7(lines 7 9) no Hoare annotation was computed. [2021-10-16 02:11:10,747 INFO L853 garLoopResultBuilder]: At program point L7-2(lines 6 11) the Hoare annotation is: (let ((.cse2 (bvmul (_ bv3 32) (bvneg ULTIMATE.start_main_~y~0)))) (let ((.cse1 (bvadd .cse2 ULTIMATE.start_main_~x~0)) (.cse0 (bvneg ULTIMATE.start_gcd_test_~b))) (and (= (bvsrem ULTIMATE.start_main_~y~0 (bvadd (bvmul .cse0 (_ bv3 32)) ULTIMATE.start_gcd_test_~a)) (_ bv0 32)) (= .cse1 ULTIMATE.start_gcd_test_~a) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (= (_ bv18 32) ULTIMATE.start_main_~y~0) (= .cse1 |ULTIMATE.start_gcd_test_#res|) (= (_ bv0 32) (bvsrem ULTIMATE.start_main_~y~0 (bvadd ULTIMATE.start_gcd_test_~a .cse0))) (= ULTIMATE.start_main_~x~0 (_ bv63 32)) (= ULTIMATE.start_main_~g~0 (bvadd .cse2 (_ bv63 32)))))) [2021-10-16 02:11:10,747 INFO L857 garLoopResultBuilder]: For program point L7-3(lines 7 9) no Hoare annotation was computed. [2021-10-16 02:11:10,747 INFO L853 garLoopResultBuilder]: At program point L7-5(lines 6 11) the Hoare annotation is: (let ((.cse2 (bvmul (_ bv3 32) (bvneg ULTIMATE.start_main_~y~0)))) (let ((.cse1 (bvadd .cse2 ULTIMATE.start_main_~x~0)) (.cse0 (bvneg ULTIMATE.start_gcd_test_~b))) (and (= (bvsrem ULTIMATE.start_main_~y~0 (bvadd (bvmul .cse0 (_ bv3 32)) ULTIMATE.start_gcd_test_~a)) (_ bv0 32)) (= .cse1 ULTIMATE.start_gcd_test_~a) (= ULTIMATE.start___VERIFIER_assert_~cond (_ bv1 32)) (= (_ bv18 32) ULTIMATE.start_main_~y~0) (= .cse1 |ULTIMATE.start_gcd_test_#res|) (= (_ bv0 32) (bvsrem ULTIMATE.start_main_~y~0 (bvadd ULTIMATE.start_gcd_test_~a .cse0))) (= ULTIMATE.start_main_~x~0 (_ bv63 32)) (= ULTIMATE.start_main_~g~0 (bvadd .cse2 (_ bv63 32)))))) [2021-10-16 02:11:10,747 INFO L857 garLoopResultBuilder]: For program point L7-6(lines 7 9) no Hoare annotation was computed. [2021-10-16 02:11:10,747 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-16 02:11:10,748 INFO L860 garLoopResultBuilder]: At program point L7-8(lines 6 11) the Hoare annotation is: true [2021-10-16 02:11:10,748 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-16 02:11:10,748 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-16 02:11:10,748 INFO L853 garLoopResultBuilder]: At program point L28(lines 12 29) the Hoare annotation is: (let ((.cse0 (bvadd (bvmul (_ bv3 32) (bvneg ULTIMATE.start_main_~y~0)) ULTIMATE.start_main_~x~0)) (.cse1 (bvneg ULTIMATE.start_gcd_test_~b))) (and (= .cse0 ULTIMATE.start_gcd_test_~a) (= (bvsrem ULTIMATE.start_main_~x~0 (bvadd (bvmul .cse1 (_ bv3 32)) ULTIMATE.start_gcd_test_~a)) (_ bv0 32)) (= (_ bv18 32) ULTIMATE.start_main_~y~0) (= .cse0 |ULTIMATE.start_gcd_test_#res|) (= (_ bv0 32) (bvsrem ULTIMATE.start_main_~y~0 (bvadd ULTIMATE.start_gcd_test_~a .cse1))) (= ULTIMATE.start_main_~x~0 (_ bv63 32)) (= (bvsrem ULTIMATE.start_main_~x~0 (bvadd ULTIMATE.start_gcd_test_~a (bvmul .cse1 (_ bv2 32)))) (_ bv0 32)))) [2021-10-16 02:11:10,748 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-16 02:11:10,749 INFO L857 garLoopResultBuilder]: For program point L8(line 8) no Hoare annotation was computed. [2021-10-16 02:11:10,749 INFO L857 garLoopResultBuilder]: For program point L8-1(line 8) no Hoare annotation was computed. [2021-10-16 02:11:10,749 INFO L857 garLoopResultBuilder]: For program point L8-2(line 8) no Hoare annotation was computed. [2021-10-16 02:11:10,749 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-16 02:11:10,749 INFO L857 garLoopResultBuilder]: For program point L21-2(lines 21 27) no Hoare annotation was computed. [2021-10-16 02:11:10,749 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2021-10-16 02:11:10,750 INFO L857 garLoopResultBuilder]: For program point L22(lines 22 26) no Hoare annotation was computed. [2021-10-16 02:11:10,750 INFO L853 garLoopResultBuilder]: At program point L22-2(lines 21 27) the Hoare annotation is: (let ((.cse0 (= ULTIMATE.start_main_~y~0 ULTIMATE.start_gcd_test_~b)) (.cse3 (bvneg ULTIMATE.start_gcd_test_~b)) (.cse5 (= (bvadd (bvmul (_ bv3 32) (bvneg ULTIMATE.start_main_~y~0)) ULTIMATE.start_main_~x~0) ULTIMATE.start_gcd_test_~a)) (.cse1 (= (_ bv18 32) ULTIMATE.start_main_~y~0)) (.cse4 (= ULTIMATE.start_main_~x~0 (_ bv63 32)))) (or (let ((.cse2 (bvmul (_ bv2 32) .cse3))) (and .cse0 .cse1 (= ULTIMATE.start_gcd_test_~a (bvadd .cse2 ULTIMATE.start_main_~x~0)) (= (bvadd .cse2 (_ bv63 32)) ULTIMATE.start_gcd_test_~a))) (and (= (bvadd (_ bv18 32) (bvneg ULTIMATE.start_gcd_test_~a)) ULTIMATE.start_gcd_test_~b) .cse1 .cse4 (= ULTIMATE.start_gcd_test_~a (_ bv9 32))) (and .cse5 (= ULTIMATE.start_gcd_test_~a (bvadd (bvmul (_ bv3 32) .cse3) (_ bv63 32))) .cse1 .cse4) (and .cse0 (= ULTIMATE.start_gcd_test_~a (_ bv63 32)) .cse1 .cse4) (and .cse0 .cse1 (= ULTIMATE.start_gcd_test_~a (bvadd .cse3 (_ bv63 32))) .cse4) (and (= ULTIMATE.start_gcd_test_~b (_ bv0 32)) .cse5 .cse1 .cse4))) [2021-10-16 02:11:10,750 INFO L860 garLoopResultBuilder]: At program point L47(lines 32 48) the Hoare annotation is: true [2021-10-16 02:11:10,750 INFO L857 garLoopResultBuilder]: For program point L14(line 14) no Hoare annotation was computed. [2021-10-16 02:11:10,750 INFO L857 garLoopResultBuilder]: For program point L14-2(lines 13 29) no Hoare annotation was computed. [2021-10-16 02:11:10,753 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-16 02:11:10,771 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 02:11:10 BoogieIcfgContainer [2021-10-16 02:11:10,771 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-16 02:11:10,772 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-16 02:11:10,772 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-16 02:11:10,772 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-16 02:11:10,772 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 02:03:23" (3/4) ... [2021-10-16 02:11:10,785 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-16 02:11:10,795 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-10-16 02:11:10,795 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2021-10-16 02:11:10,797 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:11:10,797 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-16 02:11:10,817 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: (((((~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a && ~bvsrem32(x, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && ~bvsrem32(x, ~bvadd64(a, ~bvmul32(~bvneg32(b), 2bv32))) == 0bv32 [2021-10-16 02:11:10,817 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((~bvsrem32(y, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && cond == 1bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && g == ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), 63bv32) [2021-10-16 02:11:10,817 WARN L220 nessWitnessGenerator]: Not writing invariant because ACSL is forbidden: ((((((~bvsrem32(y, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && cond == 1bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && g == ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), 63bv32) [2021-10-16 02:11:10,831 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/witness.graphml [2021-10-16 02:11:10,832 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-16 02:11:10,833 INFO L168 Benchmark]: Toolchain (without parser) took 468030.41 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 40.6 MB in the beginning and 40.6 MB in the end (delta: 44.8 kB). Peak memory consumption was 27.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:11:10,834 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 60.8 MB. Free memory is still 41.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:11:10,834 INFO L168 Benchmark]: CACSL2BoogieTranslator took 285.80 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 44.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:11:10,834 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.26 ms. Allocated memory is still 60.8 MB. Free memory was 44.4 MB in the beginning and 43.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:11:10,835 INFO L168 Benchmark]: Boogie Preprocessor took 56.41 ms. Allocated memory is still 60.8 MB. Free memory was 43.0 MB in the beginning and 41.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-16 02:11:10,835 INFO L168 Benchmark]: RCFGBuilder took 438.93 ms. Allocated memory is still 60.8 MB. Free memory was 41.6 MB in the beginning and 31.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-16 02:11:10,835 INFO L168 Benchmark]: TraceAbstraction took 467111.76 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 31.1 MB in the beginning and 43.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. [2021-10-16 02:11:10,836 INFO L168 Benchmark]: Witness Printer took 61.08 ms. Allocated memory is still 88.1 MB. Free memory was 43.3 MB in the beginning and 40.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-16 02:11:10,838 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 60.8 MB. Free memory is still 41.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 285.80 ms. Allocated memory is still 60.8 MB. Free memory was 40.5 MB in the beginning and 44.6 MB in the end (delta: -4.1 MB). Peak memory consumption was 13.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 69.26 ms. Allocated memory is still 60.8 MB. Free memory was 44.4 MB in the beginning and 43.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 56.41 ms. Allocated memory is still 60.8 MB. Free memory was 43.0 MB in the beginning and 41.8 MB in the end (delta: 1.1 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 438.93 ms. Allocated memory is still 60.8 MB. Free memory was 41.6 MB in the beginning and 31.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 467111.76 ms. Allocated memory was 60.8 MB in the beginning and 88.1 MB in the end (delta: 27.3 MB). Free memory was 31.1 MB in the beginning and 43.3 MB in the end (delta: -12.1 MB). Peak memory consumption was 43.0 MB. Max. memory is 16.1 GB. * Witness Printer took 61.08 ms. Allocated memory is still 88.1 MB. Free memory was 43.3 MB in the beginning and 40.6 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - PositiveResult [Line: 8]: 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, 24 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 466993.5ms, OverallIterations: 8, TraceHistogramMax: 8, EmptinessCheckTime: 27.5ms, AutomataDifference: 369087.4ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 18400.7ms, InitialAbstractionConstructionTime: 12.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 119 SDtfs, 569 SDslu, 533 SDs, 0 SdLazy, 858 SolverSat, 211 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 35061.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 705 GetRequests, 561 SyntacticMatches, 4 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 1 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 381888.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=66occurred in iteration=6, InterpolantAutomatonStates: 98, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 83.2ms AutomataMinimizationTime, 8 MinimizatonAttempts, 75 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 6 LocationsWithAnnotation, 6 PreInvPairs, 19 NumberOfFragments, 267 HoareAnnotationTreeSize, 6 FomulaSimplifications, 131 FormulaSimplificationTreeSizeReduction, 150.7ms HoareSimplificationTime, 6 FomulaSimplificationsInter, 515 FormulaSimplificationTreeSizeReductionInter, 18243.8ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 116.1ms SsaConstructionTime, 1636.7ms SatisfiabilityAnalysisTime, 71002.4ms InterpolantComputationTime, 348 NumberOfCodeBlocks, 348 NumberOfCodeBlocksAsserted, 39 NumberOfCheckSat, 660 ConstructedInterpolants, 2 QuantifiedInterpolants, 5709 SizeOfPredicates, 113 NumberOfNonLiveVariables, 923 ConjunctsInSsa, 222 ConjunctsInUnsatCore, 36 InterpolantComputations, 6 PerfectInterpolantSequences, 260/956 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: 32]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: ((((((~bvsrem32(y, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && cond == 1bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && g == ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), 63bv32) - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: ((((((~bvsrem32(y, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && cond == 1bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && g == ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), 63bv32) - InvariantResult [Line: 12]: Loop Invariant Derived loop invariant: (((((~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a && ~bvsrem32(x, ~bvadd64(~bvmul32(~bvneg32(b), 3bv32), a)) == 0bv32) && 18bv32 == y) && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == \result) && 0bv32 == ~bvsrem32(y, ~bvadd64(a, ~bvneg32(b)))) && x == 63bv32) && ~bvsrem32(x, ~bvadd64(a, ~bvmul32(~bvneg32(b), 2bv32))) == 0bv32 - InvariantResult [Line: 6]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: (((((((y == b && 18bv32 == y) && a == ~bvadd64(~bvmul32(2bv32, ~bvneg32(b)), x)) && ~bvadd64(~bvmul32(2bv32, ~bvneg32(b)), 63bv32) == a) || (((~bvadd64(18bv32, ~bvneg32(a)) == b && 18bv32 == y) && x == 63bv32) && a == 9bv32)) || (((~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a && a == ~bvadd64(~bvmul32(3bv32, ~bvneg32(b)), 63bv32)) && 18bv32 == y) && x == 63bv32)) || (((y == b && a == 63bv32) && 18bv32 == y) && x == 63bv32)) || (((y == b && 18bv32 == y) && a == ~bvadd64(~bvneg32(b), 63bv32)) && x == 63bv32)) || (((b == 0bv32 && ~bvadd64(~bvmul32(3bv32, ~bvneg32(y)), x) == a) && 18bv32 == y) && x == 63bv32) RESULT: Ultimate proved your program to be correct! [2021-10-16 02:11:10,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4262555-a59e-464b-9523-91231273314f/bin/utaipan-mTDlp9Zugs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...