./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/avg20-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/avg20-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc --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 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 --- 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-5e519f3 [2022-11-02 21:08:28,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:08:28,168 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:08:28,196 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:08:28,196 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:08:28,197 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:08:28,198 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:08:28,200 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:08:28,202 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:08:28,203 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:08:28,204 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:08:28,205 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:08:28,205 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:08:28,206 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:08:28,208 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:08:28,209 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:08:28,210 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:08:28,211 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:08:28,212 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:08:28,214 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:08:28,215 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:08:28,216 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:08:28,218 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:08:28,218 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:08:28,222 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:08:28,222 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:08:28,223 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:08:28,223 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:08:28,224 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:08:28,225 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:08:28,225 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:08:28,226 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:08:28,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:08:28,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:08:28,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:08:28,229 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:08:28,230 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:08:28,230 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:08:28,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:08:28,232 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:08:28,232 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:08:28,233 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:08:28,256 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:08:28,256 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:08:28,257 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:08:28,257 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:08:28,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:08:28,262 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:08:28,263 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:08:28,263 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:08:28,263 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:08:28,263 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:08:28,265 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:08:28,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:08:28,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:08:28,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:08:28,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:08:28,266 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:08:28,266 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:08:28,266 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:08:28,266 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:08:28,266 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:08:28,267 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:08:28,267 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:08:28,267 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:08:28,267 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:08:28,268 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:28,268 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:08:28,269 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:08:28,270 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:08:28,270 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:08:28,270 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:08:28,270 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:08:28,270 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:08:28,271 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:08:28,271 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 61bc8e70ac867c6ac52806e5ae8f7e7cefd73775be941aab831dd9bf86f7dc88 [2022-11-02 21:08:28,588 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:08:28,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:08:28,619 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:08:28,620 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:08:28,621 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:08:28,623 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/reducercommutativity/avg20-2.i [2022-11-02 21:08:28,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/data/fcb71da79/abeda5e6cb19422a853ed3c4d793baa6/FLAG860c5e157 [2022-11-02 21:08:29,240 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:08:29,241 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/sv-benchmarks/c/reducercommutativity/avg20-2.i [2022-11-02 21:08:29,249 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/data/fcb71da79/abeda5e6cb19422a853ed3c4d793baa6/FLAG860c5e157 [2022-11-02 21:08:29,585 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/data/fcb71da79/abeda5e6cb19422a853ed3c4d793baa6 [2022-11-02 21:08:29,588 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:08:29,589 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:08:29,591 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:29,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:08:29,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:08:29,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43d2e6ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29, skipping insertion in model container [2022-11-02 21:08:29,596 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,602 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:08:29,616 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:08:29,821 WARN L230 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_b32e14fb-b5fc-4d02-9381-276d6e7df367/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2022-11-02 21:08:29,824 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:29,831 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:08:29,851 WARN L230 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_b32e14fb-b5fc-4d02-9381-276d6e7df367/sv-benchmarks/c/reducercommutativity/avg20-2.i[1282,1295] [2022-11-02 21:08:29,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:08:29,866 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:08:29,867 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29 WrapperNode [2022-11-02 21:08:29,867 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:08:29,868 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:29,868 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:08:29,868 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:08:29,876 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,883 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,901 INFO L138 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-02 21:08:29,902 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:08:29,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:08:29,903 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:08:29,903 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:08:29,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,912 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,920 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,924 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,925 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,927 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:08:29,928 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:08:29,928 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:08:29,929 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:08:29,930 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (1/1) ... [2022-11-02 21:08:29,937 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:08:29,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:29,971 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:08:30,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:08:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:08:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:08:30,020 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:08:30,021 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:08:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure avg [2022-11-02 21:08:30,022 INFO L138 BoogieDeclarations]: Found implementation of procedure avg [2022-11-02 21:08:30,022 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:08:30,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:08:30,024 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:08:30,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:08:30,117 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:08:30,119 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:08:30,332 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:08:30,351 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:08:30,352 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 21:08:30,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:30 BoogieIcfgContainer [2022-11-02 21:08:30,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:08:30,356 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:08:30,356 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:08:30,360 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:08:30,360 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:08:29" (1/3) ... [2022-11-02 21:08:30,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b0a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:30, skipping insertion in model container [2022-11-02 21:08:30,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:08:29" (2/3) ... [2022-11-02 21:08:30,361 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72b0a975 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:08:30, skipping insertion in model container [2022-11-02 21:08:30,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:08:30" (3/3) ... [2022-11-02 21:08:30,362 INFO L112 eAbstractionObserver]: Analyzing ICFG avg20-2.i [2022-11-02 21:08:30,380 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:08:30,381 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:08:30,468 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:08:30,474 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;@4026e581, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:08:30,474 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:08:30,489 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:30,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:08:30,497 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:30,498 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:30,498 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:30,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:30,511 INFO L85 PathProgramCache]: Analyzing trace with hash -2001158789, now seen corresponding path program 1 times [2022-11-02 21:08:30,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:30,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933487440] [2022-11-02 21:08:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:30,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:30,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:30,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:08:30,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:30,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:08:30,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:30,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 21:08:30,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:30,918 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 21:08:30,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:30,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933487440] [2022-11-02 21:08:30,920 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933487440] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:30,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402910534] [2022-11-02 21:08:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:30,921 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:30,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:30,924 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:30,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:08:31,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:31,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:08:31,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:31,147 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:08:31,147 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:31,148 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402910534] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:31,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:08:31,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:08:31,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213148629] [2022-11-02 21:08:31,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:31,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:31,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:31,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:31,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:31,194 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.4) internal successors, (28), 21 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:08:31,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:31,244 INFO L93 Difference]: Finished difference Result 50 states and 69 transitions. [2022-11-02 21:08:31,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:31,247 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-02 21:08:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:31,255 INFO L225 Difference]: With dead ends: 50 [2022-11-02 21:08:31,255 INFO L226 Difference]: Without dead ends: 24 [2022-11-02 21:08:31,269 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:31,274 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:31,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 54 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:31,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-02 21:08:31,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-02 21:08:31,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:31,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-02 21:08:31,323 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-11-02 21:08:31,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:31,323 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-02 21:08:31,324 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:08:31,324 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-02 21:08:31,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 21:08:31,325 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:31,326 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:31,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:31,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 21:08:31,539 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:31,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:31,540 INFO L85 PathProgramCache]: Analyzing trace with hash 202333565, now seen corresponding path program 1 times [2022-11-02 21:08:31,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:31,540 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466198097] [2022-11-02 21:08:31,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:31,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:31,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:31,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:08:31,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:31,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:08:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:31,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-02 21:08:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:08:31,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:31,713 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466198097] [2022-11-02 21:08:31,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466198097] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:31,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882780504] [2022-11-02 21:08:31,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:31,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:31,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:31,716 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:31,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:08:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:31,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:08:31,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:08:31,810 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:31,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882780504] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:31,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:08:31,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:08:31,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016256896] [2022-11-02 21:08:31,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:31,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:31,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:31,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:31,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:31,813 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:31,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:31,825 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2022-11-02 21:08:31,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:31,826 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2022-11-02 21:08:31,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:31,827 INFO L225 Difference]: With dead ends: 42 [2022-11-02 21:08:31,827 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 21:08:31,828 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:08:31,829 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:31,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 46 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:31,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 21:08:31,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-11-02 21:08:31,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-02 21:08:31,836 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 30 [2022-11-02 21:08:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:31,836 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-02 21:08:31,836 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:31,837 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-02 21:08:31,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:08:31,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:31,838 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:31,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:32,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:32,067 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:32,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:32,068 INFO L85 PathProgramCache]: Analyzing trace with hash -796008709, now seen corresponding path program 1 times [2022-11-02 21:08:32,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:32,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805601322] [2022-11-02 21:08:32,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:32,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:08:32,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:08:32,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-02 21:08:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 21:08:32,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:32,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805601322] [2022-11-02 21:08:32,229 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805601322] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:32,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560140936] [2022-11-02 21:08:32,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:32,230 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:32,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:32,231 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:32,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:08:32,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:08:32,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:32,347 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2022-11-02 21:08:32,347 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:08:32,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560140936] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:08:32,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:08:32,348 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 21:08:32,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105241221] [2022-11-02 21:08:32,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:08:32,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:08:32,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:32,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:08:32,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:32,350 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:32,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:32,362 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2022-11-02 21:08:32,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:08:32,363 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2022-11-02 21:08:32,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:32,364 INFO L225 Difference]: With dead ends: 39 [2022-11-02 21:08:32,364 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 21:08:32,365 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:08:32,366 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 1 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:32,367 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:32,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 21:08:32,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-02 21:08:32,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:32,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-02 21:08:32,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 36 [2022-11-02 21:08:32,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:32,374 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-02 21:08:32,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:08:32,374 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-02 21:08:32,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 21:08:32,375 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:32,376 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:32,410 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:32,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-02 21:08:32,602 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:32,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:32,603 INFO L85 PathProgramCache]: Analyzing trace with hash 165229081, now seen corresponding path program 1 times [2022-11-02 21:08:32,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:32,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986611419] [2022-11-02 21:08:32,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:32,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:08:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 21:08:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:08:32,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 21:08:32,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:32,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986611419] [2022-11-02 21:08:32,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986611419] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:32,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368193359] [2022-11-02 21:08:32,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:32,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:32,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:32,727 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:32,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:08:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:32,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:08:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:32,887 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 21:08:32,891 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:32,955 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2022-11-02 21:08:32,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368193359] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:32,955 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:32,956 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-02 21:08:32,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134851468] [2022-11-02 21:08:32,956 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:32,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:08:32,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:32,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:08:32,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:32,960 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:08:33,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:33,003 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2022-11-02 21:08:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:08:33,004 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 38 [2022-11-02 21:08:33,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:33,005 INFO L225 Difference]: With dead ends: 54 [2022-11-02 21:08:33,005 INFO L226 Difference]: Without dead ends: 34 [2022-11-02 21:08:33,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:33,007 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:33,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 102 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-02 21:08:33,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2022-11-02 21:08:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 28 states have internal predecessors, (31), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:33,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2022-11-02 21:08:33,013 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 38 [2022-11-02 21:08:33,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:33,014 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2022-11-02 21:08:33,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 9 states have internal predecessors, (37), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:08:33,014 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2022-11-02 21:08:33,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 21:08:33,015 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:33,016 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:33,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:33,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:33,242 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:33,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:33,243 INFO L85 PathProgramCache]: Analyzing trace with hash -1299679203, now seen corresponding path program 2 times [2022-11-02 21:08:33,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:33,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771869270] [2022-11-02 21:08:33,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:33,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:33,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:33,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-02 21:08:33,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:33,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2022-11-02 21:08:33,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:33,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 21:08:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:33,437 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2022-11-02 21:08:33,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:33,438 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771869270] [2022-11-02 21:08:33,438 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771869270] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:33,439 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977673996] [2022-11-02 21:08:33,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:08:33,439 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:33,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:33,440 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:33,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:08:33,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:08:33,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:08:33,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:33,609 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 21:08:33,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:33,714 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2022-11-02 21:08:33,714 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977673996] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:33,714 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:33,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-02 21:08:33,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272275217] [2022-11-02 21:08:33,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:33,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:08:33,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:33,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:08:33,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:08:33,719 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:08:33,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:33,798 INFO L93 Difference]: Finished difference Result 70 states and 84 transitions. [2022-11-02 21:08:33,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:08:33,799 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 50 [2022-11-02 21:08:33,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:33,803 INFO L225 Difference]: With dead ends: 70 [2022-11-02 21:08:33,803 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 21:08:33,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:08:33,807 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:33,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 80 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:33,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 21:08:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2022-11-02 21:08:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 42 states have internal predecessors, (45), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:33,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2022-11-02 21:08:33,824 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 50 [2022-11-02 21:08:33,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:33,825 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2022-11-02 21:08:33,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:08:33,825 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2022-11-02 21:08:33,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 21:08:33,827 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:33,827 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:33,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:34,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:34,043 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:34,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:34,043 INFO L85 PathProgramCache]: Analyzing trace with hash 936210247, now seen corresponding path program 3 times [2022-11-02 21:08:34,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:34,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252849564] [2022-11-02 21:08:34,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:34,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 21:08:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:34,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-11-02 21:08:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:34,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2022-11-02 21:08:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:34,368 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2022-11-02 21:08:34,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:34,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252849564] [2022-11-02 21:08:34,368 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252849564] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:34,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919568499] [2022-11-02 21:08:34,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:08:34,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:34,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:34,370 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:34,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:08:34,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:08:34,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:34,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:08:34,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-02 21:08:34,503 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:34,579 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 32 proven. 4 refuted. 0 times theorem prover too weak. 131 trivial. 0 not checked. [2022-11-02 21:08:34,579 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1919568499] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:34,579 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:34,580 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-02 21:08:34,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714426251] [2022-11-02 21:08:34,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:34,580 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:08:34,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:34,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:08:34,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:08:34,581 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:34,663 INFO L93 Difference]: Finished difference Result 82 states and 97 transitions. [2022-11-02 21:08:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 21:08:34,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 64 [2022-11-02 21:08:34,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:34,665 INFO L225 Difference]: With dead ends: 82 [2022-11-02 21:08:34,665 INFO L226 Difference]: Without dead ends: 58 [2022-11-02 21:08:34,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:08:34,666 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 20 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:34,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 102 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2022-11-02 21:08:34,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2022-11-02 21:08:34,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 52 states have internal predecessors, (55), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:34,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-11-02 21:08:34,673 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 64 [2022-11-02 21:08:34,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:34,674 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-11-02 21:08:34,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 19 states have internal predecessors, (62), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:34,674 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-11-02 21:08:34,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-02 21:08:34,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:34,676 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:34,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:34,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 21:08:34,891 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:34,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:34,892 INFO L85 PathProgramCache]: Analyzing trace with hash 161581377, now seen corresponding path program 4 times [2022-11-02 21:08:34,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:34,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415257025] [2022-11-02 21:08:34,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:34,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:34,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:35,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-02 21:08:35,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:35,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-11-02 21:08:35,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:35,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2022-11-02 21:08:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:35,244 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 379 trivial. 0 not checked. [2022-11-02 21:08:35,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415257025] [2022-11-02 21:08:35,244 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415257025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:35,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91335777] [2022-11-02 21:08:35,244 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:08:35,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:35,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:35,246 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:35,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:08:35,379 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:08:35,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:35,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:08:35,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 178 proven. 4 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2022-11-02 21:08:35,424 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:35,479 INFO L134 CoverageAnalysis]: Checked inductivity of 500 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2022-11-02 21:08:35,479 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91335777] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:35,479 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:35,479 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 5, 5] total 20 [2022-11-02 21:08:35,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676263485] [2022-11-02 21:08:35,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:35,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-11-02 21:08:35,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-11-02 21:08:35,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:08:35,482 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:35,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:35,558 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2022-11-02 21:08:35,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-02 21:08:35,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 90 [2022-11-02 21:08:35,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:35,560 INFO L225 Difference]: With dead ends: 100 [2022-11-02 21:08:35,560 INFO L226 Difference]: Without dead ends: 68 [2022-11-02 21:08:35,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2022-11-02 21:08:35,562 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:35,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 81 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:35,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-11-02 21:08:35,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-11-02 21:08:35,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 62 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-11-02 21:08:35,570 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 90 [2022-11-02 21:08:35,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:35,570 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-11-02 21:08:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.15) internal successors, (63), 20 states have internal predecessors, (63), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-11-02 21:08:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-02 21:08:35,572 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:35,572 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 12, 12, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:35,611 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:35,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 21:08:35,787 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:35,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:35,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1010910917, now seen corresponding path program 5 times [2022-11-02 21:08:35,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:35,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727336550] [2022-11-02 21:08:35,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:35,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:35,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:36,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 21:08:36,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:36,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-11-02 21:08:36,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:36,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2022-11-02 21:08:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:36,241 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 411 trivial. 0 not checked. [2022-11-02 21:08:36,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:36,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727336550] [2022-11-02 21:08:36,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727336550] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:36,244 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089114100] [2022-11-02 21:08:36,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:08:36,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:36,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:36,246 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:36,270 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:08:37,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2022-11-02 21:08:37,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:37,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 307 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:08:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:37,227 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 347 trivial. 0 not checked. [2022-11-02 21:08:37,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:37,431 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2022-11-02 21:08:37,432 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089114100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:37,432 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:37,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 29 [2022-11-02 21:08:37,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422387525] [2022-11-02 21:08:37,432 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:37,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-02 21:08:37,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:37,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-02 21:08:37,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:08:37,434 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:37,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:37,569 INFO L93 Difference]: Finished difference Result 126 states and 145 transitions. [2022-11-02 21:08:37,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-11-02 21:08:37,570 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 100 [2022-11-02 21:08:37,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:37,572 INFO L225 Difference]: With dead ends: 126 [2022-11-02 21:08:37,572 INFO L226 Difference]: Without dead ends: 86 [2022-11-02 21:08:37,574 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2022-11-02 21:08:37,574 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 27 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:37,575 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 142 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:37,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-11-02 21:08:37,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-11-02 21:08:37,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0375) internal successors, (83), 80 states have internal predecessors, (83), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:37,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-11-02 21:08:37,593 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 100 [2022-11-02 21:08:37,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:37,594 INFO L495 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-11-02 21:08:37,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.7586206896551726) internal successors, (80), 29 states have internal predecessors, (80), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:37,594 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-11-02 21:08:37,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-11-02 21:08:37,607 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:37,607 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 13, 13, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:37,653 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:37,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:37,831 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:37,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:37,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1009519917, now seen corresponding path program 6 times [2022-11-02 21:08:37,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:37,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259254262] [2022-11-02 21:08:37,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:37,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:38,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-02 21:08:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:38,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-11-02 21:08:38,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:38,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2022-11-02 21:08:38,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1899 trivial. 0 not checked. [2022-11-02 21:08:38,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:38,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259254262] [2022-11-02 21:08:38,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259254262] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:38,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830800570] [2022-11-02 21:08:38,446 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:08:38,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:38,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:38,451 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:38,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:08:39,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2022-11-02 21:08:39,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:39,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 327 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:08:39,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 850 proven. 36 refuted. 0 times theorem prover too weak. 1182 trivial. 0 not checked. [2022-11-02 21:08:39,320 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:39,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2068 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2022-11-02 21:08:39,516 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830800570] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:39,516 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:39,516 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2022-11-02 21:08:39,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340530392] [2022-11-02 21:08:39,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:39,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-02 21:08:39,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:39,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-02 21:08:39,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-11-02 21:08:39,518 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:39,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:39,631 INFO L93 Difference]: Finished difference Result 160 states and 176 transitions. [2022-11-02 21:08:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-02 21:08:39,631 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 150 [2022-11-02 21:08:39,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:39,632 INFO L225 Difference]: With dead ends: 160 [2022-11-02 21:08:39,632 INFO L226 Difference]: Without dead ends: 104 [2022-11-02 21:08:39,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 292 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=239, Invalid=631, Unknown=0, NotChecked=0, Total=870 [2022-11-02 21:08:39,634 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 35 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:39,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 120 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:39,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-11-02 21:08:39,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-11-02 21:08:39,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.030612244897959) internal successors, (101), 98 states have internal predecessors, (101), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:39,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 107 transitions. [2022-11-02 21:08:39,643 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 107 transitions. Word has length 150 [2022-11-02 21:08:39,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:39,643 INFO L495 AbstractCegarLoop]: Abstraction has 103 states and 107 transitions. [2022-11-02 21:08:39,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.7666666666666666) internal successors, (83), 30 states have internal predecessors, (83), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:08:39,644 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 107 transitions. [2022-11-02 21:08:39,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-11-02 21:08:39,645 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:39,646 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 14, 14, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:39,686 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:39,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:39,874 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:39,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:39,875 INFO L85 PathProgramCache]: Analyzing trace with hash -794036833, now seen corresponding path program 7 times [2022-11-02 21:08:39,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:39,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688174223] [2022-11-02 21:08:39,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:39,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:39,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:40,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 21:08:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:40,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-11-02 21:08:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:40,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2022-11-02 21:08:40,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-02 21:08:40,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688174223] [2022-11-02 21:08:40,478 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688174223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:40,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500555872] [2022-11-02 21:08:40,478 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:08:40,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:40,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:40,483 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:40,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:08:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:40,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 561 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:08:40,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-02 21:08:40,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:41,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2255 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2022-11-02 21:08:41,030 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500555872] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:41,030 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:41,030 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 23 [2022-11-02 21:08:41,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560518058] [2022-11-02 21:08:41,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:41,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 21:08:41,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:41,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 21:08:41,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:08:41,032 INFO L87 Difference]: Start difference. First operand 103 states and 107 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:08:41,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:41,096 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2022-11-02 21:08:41,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:08:41,097 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 168 [2022-11-02 21:08:41,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:41,098 INFO L225 Difference]: With dead ends: 187 [2022-11-02 21:08:41,098 INFO L226 Difference]: Without dead ends: 115 [2022-11-02 21:08:41,098 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 357 GetRequests, 326 SyntacticMatches, 10 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:08:41,099 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:41,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 134 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:41,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-11-02 21:08:41,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-11-02 21:08:41,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0272727272727273) internal successors, (113), 110 states have internal predecessors, (113), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:41,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-11-02 21:08:41,108 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 168 [2022-11-02 21:08:41,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:41,108 INFO L495 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-11-02 21:08:41,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 23 states have internal predecessors, (67), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:08:41,108 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-11-02 21:08:41,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-11-02 21:08:41,110 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:41,111 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:41,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:41,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:08:41,326 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:41,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:41,326 INFO L85 PathProgramCache]: Analyzing trace with hash -784239573, now seen corresponding path program 8 times [2022-11-02 21:08:41,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:41,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436064514] [2022-11-02 21:08:41,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:41,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:41,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:41,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:08:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:41,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-11-02 21:08:41,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:41,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2022-11-02 21:08:41,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:42,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2022-11-02 21:08:42,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:42,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436064514] [2022-11-02 21:08:42,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436064514] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:42,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414683456] [2022-11-02 21:08:42,007 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:08:42,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:42,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:42,008 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:42,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:08:42,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:08:42,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:42,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 615 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:08:42,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 844 proven. 196 refuted. 0 times theorem prover too weak. 1419 trivial. 0 not checked. [2022-11-02 21:08:42,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:42,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2459 backedges. 0 proven. 1044 refuted. 0 times theorem prover too weak. 1415 trivial. 0 not checked. [2022-11-02 21:08:42,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414683456] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:42,549 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:42,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-02 21:08:42,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809017540] [2022-11-02 21:08:42,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:42,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:08:42,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:42,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:08:42,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:08:42,551 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:08:42,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:42,612 INFO L93 Difference]: Finished difference Result 198 states and 213 transitions. [2022-11-02 21:08:42,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:08:42,613 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 180 [2022-11-02 21:08:42,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:42,614 INFO L225 Difference]: With dead ends: 198 [2022-11-02 21:08:42,614 INFO L226 Difference]: Without dead ends: 127 [2022-11-02 21:08:42,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 351 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:08:42,616 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 20 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:42,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 90 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:42,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-02 21:08:42,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-11-02 21:08:42,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0245901639344261) internal successors, (125), 122 states have internal predecessors, (125), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:42,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 131 transitions. [2022-11-02 21:08:42,624 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 131 transitions. Word has length 180 [2022-11-02 21:08:42,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:42,624 INFO L495 AbstractCegarLoop]: Abstraction has 127 states and 131 transitions. [2022-11-02 21:08:42,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 22 states have internal predecessors, (68), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:08:42,625 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 131 transitions. [2022-11-02 21:08:42,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-02 21:08:42,627 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:42,627 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:42,668 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:42,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:42,846 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:42,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:42,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1743923041, now seen corresponding path program 9 times [2022-11-02 21:08:42,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:42,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719170356] [2022-11-02 21:08:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:42,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:42,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:43,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:08:43,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:43,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-11-02 21:08:43,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:43,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2022-11-02 21:08:43,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:08:43,506 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2022-11-02 21:08:43,506 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:08:43,506 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719170356] [2022-11-02 21:08:43,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719170356] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:08:43,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200506598] [2022-11-02 21:08:43,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:08:43,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:43,507 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:08:43,508 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:08:43,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:08:47,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-02 21:08:47,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:08:47,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:08:47,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:08:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 1690 proven. 196 refuted. 0 times theorem prover too weak. 2445 trivial. 0 not checked. [2022-11-02 21:08:47,180 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:47,423 INFO L134 CoverageAnalysis]: Checked inductivity of 4331 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2022-11-02 21:08:47,423 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200506598] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:47,423 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:47,424 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-02 21:08:47,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840389798] [2022-11-02 21:08:47,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:47,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:08:47,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:47,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:08:47,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:08:47,428 INFO L87 Difference]: Start difference. First operand 127 states and 131 transitions. Second operand has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:08:47,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:47,493 INFO L93 Difference]: Finished difference Result 188 states and 197 transitions. [2022-11-02 21:08:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 21:08:47,494 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 216 [2022-11-02 21:08:47,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:47,498 INFO L225 Difference]: With dead ends: 188 [2022-11-02 21:08:47,499 INFO L226 Difference]: Without dead ends: 137 [2022-11-02 21:08:47,499 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 422 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:08:47,500 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 19 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:47,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 108 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:08:47,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-11-02 21:08:47,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-11-02 21:08:47,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0227272727272727) internal successors, (135), 132 states have internal predecessors, (135), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:08:47,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-11-02 21:08:47,514 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 216 [2022-11-02 21:08:47,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:47,516 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-11-02 21:08:47,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.9545454545454546) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:08:47,516 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-11-02 21:08:47,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-11-02 21:08:47,519 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:47,519 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:08:47,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:47,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b32e14fb-b5fc-4d02-9381-276d6e7df367/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-02 21:08:47,739 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:47,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:47,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1352255541, now seen corresponding path program 10 times [2022-11-02 21:08:47,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:47,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619871237] [2022-11-02 21:08:47,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:47,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:08:53,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat