./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive/Ackermann01-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/recursive/Ackermann01-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8 --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 17:25:39,791 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:25:39,792 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:25:39,804 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:25:39,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:25:39,805 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:25:39,806 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:25:39,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:25:39,807 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:25:39,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:25:39,808 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:25:39,809 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:25:39,809 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:25:39,810 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:25:39,811 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:25:39,811 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:25:39,812 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:25:39,812 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:25:39,813 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:25:39,814 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:25:39,815 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:25:39,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:25:39,817 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:25:39,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:25:39,819 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:25:39,819 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:25:39,820 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:25:39,820 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:25:39,820 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:25:39,821 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:25:39,821 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:25:39,822 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:25:39,822 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:25:39,823 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:25:39,823 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:25:39,823 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:25:39,824 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:25:39,824 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:25:39,824 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:25:39,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:25:39,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:25:39,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:25:39,839 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:25:39,839 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:25:39,839 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:25:39,839 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:25:39,840 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:25:39,840 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:25:39,845 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:25:39,845 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:25:39,846 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:25:39,846 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:25:39,846 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:25:39,846 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:25:39,846 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:25:39,846 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:25:39,846 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:25:39,846 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:25:39,847 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:25:39,847 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:25:39,847 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:25:39,847 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:25:39,847 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:25:39,847 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:25:39,847 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:25:39,847 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:25:39,847 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:25:39,848 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:25:39,848 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:25:39,848 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:25:39,848 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:25:39,848 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:25:39,848 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:25:39,848 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:25:39,848 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:25:39,849 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:25:39,849 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:25:39,849 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 93bcf8b6df587e0bc8cb137c6415932ffc9083999b1b09826c5b148989ca1a7b [2022-12-13 17:25:40,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:25:40,036 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:25:40,038 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:25:40,039 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:25:40,039 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:25:40,040 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/recursive/Ackermann01-2.c [2022-12-13 17:25:42,590 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:25:42,737 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:25:42,738 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/sv-benchmarks/c/recursive/Ackermann01-2.c [2022-12-13 17:25:42,742 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/data/d7a99661d/bfe28563bcae49d5b16e7e6fd3fe7481/FLAG1a9ea052b [2022-12-13 17:25:43,165 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/data/d7a99661d/bfe28563bcae49d5b16e7e6fd3fe7481 [2022-12-13 17:25:43,167 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:25:43,168 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:25:43,169 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:25:43,169 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:25:43,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:25:43,172 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,173 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@61b98f57 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43, skipping insertion in model container [2022-12-13 17:25:43,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,178 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:25:43,187 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:25:43,284 WARN L237 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_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2022-12-13 17:25:43,287 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:25:43,293 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:25:43,304 WARN L237 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_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/sv-benchmarks/c/recursive/Ackermann01-2.c[1234,1247] [2022-12-13 17:25:43,304 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:25:43,313 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:25:43,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43 WrapperNode [2022-12-13 17:25:43,314 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:25:43,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:25:43,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:25:43,315 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:25:43,320 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,324 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,334 INFO L138 Inliner]: procedures = 13, calls = 11, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 32 [2022-12-13 17:25:43,335 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:25:43,335 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:25:43,335 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:25:43,335 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:25:43,341 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,342 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,343 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,344 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,345 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,345 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:25:43,347 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:25:43,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:25:43,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:25:43,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (1/1) ... [2022-12-13 17:25:43,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:25:43,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:25:43,368 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:25:43,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:25:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:25:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:25:43,397 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:25:43,397 INFO L130 BoogieDeclarations]: Found specification of procedure ackermann [2022-12-13 17:25:43,398 INFO L138 BoogieDeclarations]: Found implementation of procedure ackermann [2022-12-13 17:25:43,398 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:25:43,447 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:25:43,449 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:25:43,530 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:25:43,534 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:25:43,534 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-13 17:25:43,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:25:43 BoogieIcfgContainer [2022-12-13 17:25:43,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:25:43,538 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:25:43,538 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:25:43,542 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:25:43,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:25:43" (1/3) ... [2022-12-13 17:25:43,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77138e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:25:43, skipping insertion in model container [2022-12-13 17:25:43,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:25:43" (2/3) ... [2022-12-13 17:25:43,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77138e9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:25:43, skipping insertion in model container [2022-12-13 17:25:43,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:25:43" (3/3) ... [2022-12-13 17:25:43,545 INFO L112 eAbstractionObserver]: Analyzing ICFG Ackermann01-2.c [2022-12-13 17:25:43,560 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:25:43,560 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:25:43,597 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:25:43,602 INFO L357 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, mAutomataTypeConcurrency=PETRI_NET, 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@4d5edc5f, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:25:43,602 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-12-13 17:25:43,605 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-12-13 17:25:43,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-12-13 17:25:43,611 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:43,612 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:43,612 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:25:43,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:43,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1470704041, now seen corresponding path program 1 times [2022-12-13 17:25:43,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:43,623 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424376220] [2022-12-13 17:25:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:43,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:43,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:43,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 17:25:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 17:25:43,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:43,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424376220] [2022-12-13 17:25:43,891 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424376220] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:25:43,891 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:25:43,892 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-12-13 17:25:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466219407] [2022-12-13 17:25:43,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:25:43,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 17:25:43,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:25:43,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 17:25:43,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-12-13 17:25:43,937 INFO L87 Difference]: Start difference. First operand has 23 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 17:25:44,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:44,039 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2022-12-13 17:25:44,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-12-13 17:25:44,042 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-12-13 17:25:44,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:44,049 INFO L225 Difference]: With dead ends: 38 [2022-12-13 17:25:44,050 INFO L226 Difference]: Without dead ends: 22 [2022-12-13 17:25:44,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-12-13 17:25:44,056 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:44,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 88 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:25:44,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-12-13 17:25:44,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-12-13 17:25:44,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 4 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 17:25:44,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2022-12-13 17:25:44,087 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 12 [2022-12-13 17:25:44,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:44,088 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2022-12-13 17:25:44,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-12-13 17:25:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2022-12-13 17:25:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-12-13 17:25:44,090 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:44,090 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:44,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:25:44,091 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:25:44,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:44,091 INFO L85 PathProgramCache]: Analyzing trace with hash 941922339, now seen corresponding path program 1 times [2022-12-13 17:25:44,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:44,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339164272] [2022-12-13 17:25:44,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:44,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:44,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 17:25:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:44,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:25:44,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:44,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339164272] [2022-12-13 17:25:44,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339164272] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:25:44,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:25:44,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-12-13 17:25:44,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705501283] [2022-12-13 17:25:44,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:25:44,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-12-13 17:25:44,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:25:44,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-12-13 17:25:44,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-12-13 17:25:44,265 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 17:25:44,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:44,375 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2022-12-13 17:25:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:25:44,376 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 19 [2022-12-13 17:25:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:44,377 INFO L225 Difference]: With dead ends: 29 [2022-12-13 17:25:44,377 INFO L226 Difference]: Without dead ends: 25 [2022-12-13 17:25:44,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2022-12-13 17:25:44,379 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 10 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:44,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 68 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:25:44,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-12-13 17:25:44,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-12-13 17:25:44,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 4 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (7), 5 states have call predecessors, (7), 4 states have call successors, (7) [2022-12-13 17:25:44,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2022-12-13 17:25:44,384 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 19 [2022-12-13 17:25:44,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:44,385 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2022-12-13 17:25:44,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2022-12-13 17:25:44,385 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2022-12-13 17:25:44,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-12-13 17:25:44,385 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:44,386 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:44,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:25:44,386 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:25:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash -445405100, now seen corresponding path program 1 times [2022-12-13 17:25:44,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:44,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351612886] [2022-12-13 17:25:44,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:44,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:44,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:44,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 17:25:44,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:44,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:44,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-12-13 17:25:44,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:44,457 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-12-13 17:25:44,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:44,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351612886] [2022-12-13 17:25:44,457 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351612886] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:25:44,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102589077] [2022-12-13 17:25:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:44,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:44,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:25:44,459 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:25:44,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 17:25:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:44,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 6 conjunts are in the unsatisfiable core [2022-12-13 17:25:44,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:44,577 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:25:44,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:25:44,710 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-12-13 17:25:44,710 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102589077] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:25:44,710 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:25:44,711 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7, 7] total 12 [2022-12-13 17:25:44,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555598969] [2022-12-13 17:25:44,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:25:44,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-12-13 17:25:44,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:25:44,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-12-13 17:25:44,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2022-12-13 17:25:44,713 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 17:25:44,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:44,810 INFO L93 Difference]: Finished difference Result 48 states and 75 transitions. [2022-12-13 17:25:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-12-13 17:25:44,811 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) Word has length 25 [2022-12-13 17:25:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:44,812 INFO L225 Difference]: With dead ends: 48 [2022-12-13 17:25:44,813 INFO L226 Difference]: Without dead ends: 30 [2022-12-13 17:25:44,813 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2022-12-13 17:25:44,815 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 50 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:44,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 85 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:25:44,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-12-13 17:25:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 25. [2022-12-13 17:25:44,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 18 states have internal predecessors, (19), 4 states have call successors, (4), 1 states have call predecessors, (4), 3 states have return successors, (9), 5 states have call predecessors, (9), 4 states have call successors, (9) [2022-12-13 17:25:44,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2022-12-13 17:25:44,824 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 25 [2022-12-13 17:25:44,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:44,825 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2022-12-13 17:25:44,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 4 states have call successors, (5), 1 states have call predecessors, (5), 5 states have return successors, (5), 2 states have call predecessors, (5), 4 states have call successors, (5) [2022-12-13 17:25:44,825 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2022-12-13 17:25:44,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-12-13 17:25:44,827 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:44,827 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:44,833 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 17:25:45,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:45,029 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:25:45,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:45,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1893657534, now seen corresponding path program 1 times [2022-12-13 17:25:45,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:45,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490982958] [2022-12-13 17:25:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:45,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:45,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 17:25:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:45,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:45,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:45,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:45,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 17:25:45,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:45,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:25:45,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:45,355 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490982958] [2022-12-13 17:25:45,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490982958] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:25:45,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551385551] [2022-12-13 17:25:45,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:45,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:45,356 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:25:45,357 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:25:45,358 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 17:25:45,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:45,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjunts are in the unsatisfiable core [2022-12-13 17:25:45,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:45,449 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-12-13 17:25:45,449 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:25:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2022-12-13 17:25:45,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551385551] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:25:45,859 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:25:45,859 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 13] total 25 [2022-12-13 17:25:45,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108773243] [2022-12-13 17:25:45,859 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:25:45,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-12-13 17:25:45,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:25:45,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-12-13 17:25:45,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2022-12-13 17:25:45,861 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-13 17:25:46,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:46,210 INFO L93 Difference]: Finished difference Result 57 states and 97 transitions. [2022-12-13 17:25:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-12-13 17:25:46,211 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) Word has length 32 [2022-12-13 17:25:46,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:46,214 INFO L225 Difference]: With dead ends: 57 [2022-12-13 17:25:46,214 INFO L226 Difference]: Without dead ends: 51 [2022-12-13 17:25:46,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=279, Invalid=1443, Unknown=0, NotChecked=0, Total=1722 [2022-12-13 17:25:46,216 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 63 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:46,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 164 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-12-13 17:25:46,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-12-13 17:25:46,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 38. [2022-12-13 17:25:46,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.08) internal successors, (27), 26 states have internal predecessors, (27), 6 states have call successors, (6), 1 states have call predecessors, (6), 6 states have return successors, (31), 10 states have call predecessors, (31), 6 states have call successors, (31) [2022-12-13 17:25:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2022-12-13 17:25:46,231 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 32 [2022-12-13 17:25:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:46,231 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2022-12-13 17:25:46,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 19 states have internal predecessors, (37), 3 states have call successors, (5), 1 states have call predecessors, (5), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2022-12-13 17:25:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2022-12-13 17:25:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-12-13 17:25:46,233 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:46,233 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:46,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 17:25:46,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:46,435 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:25:46,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:46,435 INFO L85 PathProgramCache]: Analyzing trace with hash 372648096, now seen corresponding path program 2 times [2022-12-13 17:25:46,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:46,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016379030] [2022-12-13 17:25:46,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:46,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:46,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 17:25:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:46,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:46,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:46,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:46,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:46,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:46,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 17:25:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:46,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:46,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 17:25:46,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016379030] [2022-12-13 17:25:46,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016379030] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:25:46,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564642271] [2022-12-13 17:25:46,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-12-13 17:25:46,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:46,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:25:46,696 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:25:46,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 17:25:46,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-12-13 17:25:46,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:25:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 9 conjunts are in the unsatisfiable core [2022-12-13 17:25:46,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:46,793 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 31 proven. 13 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-12-13 17:25:46,793 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:25:47,072 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 36 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-12-13 17:25:47,072 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564642271] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:25:47,072 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:25:47,072 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 20 [2022-12-13 17:25:47,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435305214] [2022-12-13 17:25:47,073 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:25:47,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-12-13 17:25:47,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:25:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-12-13 17:25:47,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2022-12-13 17:25:47,075 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-12-13 17:25:47,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:47,322 INFO L93 Difference]: Finished difference Result 96 states and 220 transitions. [2022-12-13 17:25:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-12-13 17:25:47,323 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) Word has length 46 [2022-12-13 17:25:47,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:47,324 INFO L225 Difference]: With dead ends: 96 [2022-12-13 17:25:47,324 INFO L226 Difference]: Without dead ends: 63 [2022-12-13 17:25:47,325 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=685, Unknown=0, NotChecked=0, Total=870 [2022-12-13 17:25:47,326 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 58 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:47,326 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 114 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-13 17:25:47,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-12-13 17:25:47,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2022-12-13 17:25:47,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 40 states have internal predecessors, (41), 9 states have call successors, (9), 2 states have call predecessors, (9), 11 states have return successors, (57), 17 states have call predecessors, (57), 9 states have call successors, (57) [2022-12-13 17:25:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 107 transitions. [2022-12-13 17:25:47,335 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 107 transitions. Word has length 46 [2022-12-13 17:25:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:47,336 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 107 transitions. [2022-12-13 17:25:47,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.35) internal successors, (47), 18 states have internal predecessors, (47), 6 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (13), 9 states have call predecessors, (13), 6 states have call successors, (13) [2022-12-13 17:25:47,336 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 107 transitions. [2022-12-13 17:25:47,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-12-13 17:25:47,337 INFO L187 NwaCegarLoop]: Found error trace [2022-12-13 17:25:47,337 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 8, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:25:47,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 17:25:47,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:47,539 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:25:47,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:25:47,540 INFO L85 PathProgramCache]: Analyzing trace with hash -558645120, now seen corresponding path program 3 times [2022-12-13 17:25:47,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:25:47,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231682665] [2022-12-13 17:25:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:25:47,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:25:47,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:47,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-12-13 17:25:47,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:47,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:47,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:47,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:47,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:47,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:48,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 17:25:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:48,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-12-13 17:25:48,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:48,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:48,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:48,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:48,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:48,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-12-13 17:25:48,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:48,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-12-13 17:25:48,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:25:48,132 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 100 proven. 93 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-12-13 17:25:48,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:25:48,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231682665] [2022-12-13 17:25:48,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231682665] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 17:25:48,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631626887] [2022-12-13 17:25:48,133 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-12-13 17:25:48,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:48,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:25:48,134 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 17:25:48,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-12-13 17:25:48,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-12-13 17:25:48,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-12-13 17:25:48,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 20 conjunts are in the unsatisfiable core [2022-12-13 17:25:48,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 17:25:48,305 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 112 proven. 20 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2022-12-13 17:25:48,305 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 17:25:49,510 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 133 proven. 2 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2022-12-13 17:25:49,510 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631626887] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 17:25:49,510 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 17:25:49,510 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12, 14] total 32 [2022-12-13 17:25:49,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111294043] [2022-12-13 17:25:49,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 17:25:49,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-12-13 17:25:49,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:25:49,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-12-13 17:25:49,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2022-12-13 17:25:49,513 INFO L87 Difference]: Start difference. First operand 60 states and 107 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 24 states have internal predecessors, (64), 7 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (27), 17 states have call predecessors, (27), 7 states have call successors, (27) [2022-12-13 17:25:50,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-13 17:25:50,311 INFO L93 Difference]: Finished difference Result 153 states and 443 transitions. [2022-12-13 17:25:50,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-12-13 17:25:50,311 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 24 states have internal predecessors, (64), 7 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (27), 17 states have call predecessors, (27), 7 states have call successors, (27) Word has length 86 [2022-12-13 17:25:50,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-13 17:25:50,312 INFO L225 Difference]: With dead ends: 153 [2022-12-13 17:25:50,312 INFO L226 Difference]: Without dead ends: 0 [2022-12-13 17:25:50,316 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 825 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=650, Invalid=3510, Unknown=0, NotChecked=0, Total=4160 [2022-12-13 17:25:50,317 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 85 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 925 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-12-13 17:25:50,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 138 Invalid, 925 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-12-13 17:25:50,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-12-13 17:25:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-12-13 17:25:50,318 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) [2022-12-13 17:25:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-12-13 17:25:50,318 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 86 [2022-12-13 17:25:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-13 17:25:50,318 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-12-13 17:25:50,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 24 states have internal predecessors, (64), 7 states have call successors, (11), 1 states have call predecessors, (11), 14 states have return successors, (27), 17 states have call predecessors, (27), 7 states have call successors, (27) [2022-12-13 17:25:50,318 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-12-13 17:25:50,318 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-12-13 17:25:50,320 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-12-13 17:25:50,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2022-12-13 17:25:50,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 17:25:50,527 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2022-12-13 17:25:50,767 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2022-12-13 17:25:50,767 INFO L899 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2022-12-13 17:25:50,767 INFO L899 garLoopResultBuilder]: For program point L30(lines 30 34) no Hoare annotation was computed. [2022-12-13 17:25:50,768 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2022-12-13 17:25:50,768 INFO L902 garLoopResultBuilder]: At program point L28(lines 28 48) the Hoare annotation is: true [2022-12-13 17:25:50,768 INFO L899 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 46) no Hoare annotation was computed. [2022-12-13 17:25:50,768 INFO L899 garLoopResultBuilder]: For program point L46(line 46) no Hoare annotation was computed. [2022-12-13 17:25:50,768 INFO L899 garLoopResultBuilder]: For program point L43(lines 43 47) no Hoare annotation was computed. [2022-12-13 17:25:50,768 INFO L895 garLoopResultBuilder]: At program point L42(line 42) the Hoare annotation is: (<= 0 |ULTIMATE.start_main_~n~0#1|) [2022-12-13 17:25:50,768 INFO L899 garLoopResultBuilder]: For program point $Ultimate##0(line -1) no Hoare annotation was computed. [2022-12-13 17:25:50,769 INFO L899 garLoopResultBuilder]: For program point L42-1(line 42) no Hoare annotation was computed. [2022-12-13 17:25:50,769 INFO L899 garLoopResultBuilder]: For program point L36(lines 36 41) no Hoare annotation was computed. [2022-12-13 17:25:50,769 INFO L899 garLoopResultBuilder]: For program point ackermannEXIT(lines 17 25) no Hoare annotation was computed. [2022-12-13 17:25:50,769 INFO L895 garLoopResultBuilder]: At program point L24(line 24) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (not (= |ackermann_#in~m| 0))) [2022-12-13 17:25:50,769 INFO L899 garLoopResultBuilder]: For program point L24-1(line 24) no Hoare annotation was computed. [2022-12-13 17:25:50,769 INFO L895 garLoopResultBuilder]: At program point L22(line 22) the Hoare annotation is: (and (= ackermann_~n |ackermann_#in~n|) (= ackermann_~m |ackermann_#in~m|) (not (= |ackermann_#in~m| 0)) (<= |ackermann_#in~n| 0)) [2022-12-13 17:25:50,769 INFO L895 garLoopResultBuilder]: At program point L24-2(line 24) the Hoare annotation is: (let ((.cse0 (= ackermann_~n |ackermann_#in~n|)) (.cse1 (= ackermann_~m |ackermann_#in~m|))) (or (and (< 0 (+ |ackermann_#t~ret5| 2)) (<= 2 |ackermann_#in~m|) .cse0 .cse1) (and .cse0 (<= 2 |ackermann_#t~ret5|) (<= 1 |ackermann_#in~m|) .cse1))) [2022-12-13 17:25:50,769 INFO L899 garLoopResultBuilder]: For program point L21(lines 21 23) no Hoare annotation was computed. [2022-12-13 17:25:50,770 INFO L899 garLoopResultBuilder]: For program point L22-1(line 22) no Hoare annotation was computed. [2022-12-13 17:25:50,770 INFO L899 garLoopResultBuilder]: For program point L24-3(line 24) no Hoare annotation was computed. [2022-12-13 17:25:50,770 INFO L899 garLoopResultBuilder]: For program point L18(lines 18 20) no Hoare annotation was computed. [2022-12-13 17:25:50,770 INFO L902 garLoopResultBuilder]: At program point $Ultimate##0(lines 17 25) the Hoare annotation is: true [2022-12-13 17:25:50,770 INFO L899 garLoopResultBuilder]: For program point ackermannFINAL(lines 17 25) no Hoare annotation was computed. [2022-12-13 17:25:50,773 INFO L445 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1] [2022-12-13 17:25:50,774 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-13 17:25:50,780 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.12 05:25:50 BoogieIcfgContainer [2022-12-13 17:25:50,780 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-13 17:25:50,781 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-13 17:25:50,781 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-13 17:25:50,781 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-13 17:25:50,782 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:25:43" (3/4) ... [2022-12-13 17:25:50,784 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-12-13 17:25:50,790 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ackermann [2022-12-13 17:25:50,793 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2022-12-13 17:25:50,793 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2022-12-13 17:25:50,794 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-12-13 17:25:50,794 INFO L961 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-12-13 17:25:50,822 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/witness.graphml [2022-12-13 17:25:50,823 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-13 17:25:50,823 INFO L158 Benchmark]: Toolchain (without parser) took 7655.34ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 93.7MB in the beginning and 84.3MB in the end (delta: 9.4MB). Peak memory consumption was 38.3MB. Max. memory is 16.1GB. [2022-12-13 17:25:50,824 INFO L158 Benchmark]: CDTParser took 0.12ms. Allocated memory is still 127.9MB. Free memory was 98.6MB in the beginning and 98.5MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:25:50,824 INFO L158 Benchmark]: CACSL2BoogieTranslator took 145.11ms. Allocated memory is still 127.9MB. Free memory was 93.3MB in the beginning and 83.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:25:50,824 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.29ms. Allocated memory is still 127.9MB. Free memory was 83.5MB in the beginning and 82.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:25:50,824 INFO L158 Benchmark]: Boogie Preprocessor took 11.27ms. Allocated memory is still 127.9MB. Free memory was 82.1MB in the beginning and 80.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-12-13 17:25:50,825 INFO L158 Benchmark]: RCFGBuilder took 189.25ms. Allocated memory is still 127.9MB. Free memory was 80.9MB in the beginning and 70.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-12-13 17:25:50,825 INFO L158 Benchmark]: TraceAbstraction took 7242.31ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 70.2MB in the beginning and 87.4MB in the end (delta: -17.2MB). Peak memory consumption was 61.6MB. Max. memory is 16.1GB. [2022-12-13 17:25:50,825 INFO L158 Benchmark]: Witness Printer took 41.80ms. Allocated memory is still 155.2MB. Free memory was 87.4MB in the beginning and 84.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-13 17:25:50,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.12ms. Allocated memory is still 127.9MB. Free memory was 98.6MB in the beginning and 98.5MB in the end (delta: 160.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 145.11ms. Allocated memory is still 127.9MB. Free memory was 93.3MB in the beginning and 83.5MB in the end (delta: 9.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.29ms. Allocated memory is still 127.9MB. Free memory was 83.5MB in the beginning and 82.1MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 11.27ms. Allocated memory is still 127.9MB. Free memory was 82.1MB in the beginning and 80.9MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 189.25ms. Allocated memory is still 127.9MB. Free memory was 80.9MB in the beginning and 70.6MB in the end (delta: 10.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 7242.31ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 70.2MB in the beginning and 87.4MB in the end (delta: -17.2MB). Peak memory consumption was 61.6MB. Max. memory is 16.1GB. * Witness Printer took 41.80ms. Allocated memory is still 155.2MB. Free memory was 87.4MB in the beginning and 84.3MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 46]: 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 2 procedures, 23 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 6, TraceHistogramMax: 12, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 307 SdHoareTripleChecker+Valid, 0.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 288 mSDsluCounter, 657 SdHoareTripleChecker+Invalid, 0.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 549 mSDsCounter, 379 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1594 IncrementalHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 379 mSolverCounterUnsat, 108 mSDtfsCounter, 1594 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 389 SyntacticMatches, 4 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 102, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 6 MinimizatonAttempts, 23 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 6 LocationsWithAnnotation, 126 PreInvPairs, 195 NumberOfFragments, 59 HoareAnnotationTreeSize, 126 FomulaSimplifications, 2091 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 6 FomulaSimplificationsInter, 798 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 3.8s InterpolantComputationTime, 409 NumberOfCodeBlocks, 372 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 584 ConstructedInterpolants, 0 QuantifiedInterpolants, 1325 SizeOfPredicates, 10 NumberOfNonLiveVariables, 539 ConjunctsInSsa, 49 ConjunctsInUnsatCore, 14 InterpolantComputations, 2 PerfectInterpolantSequences, 1129/1303 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2022-12-13 17:25:50,837 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d17835ea-6bc1-49f9-ab0d-d5270f0339c7/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE