./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-crafted/mapsum2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7e70badd Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-crafted/mapsum2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G --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 981715b042dc751421769388e93842bdf7028c46e115693f476b30e4e763298a --- Real Ultimate output --- This is Ultimate 0.2.1-dev-7e70bad [2021-11-23 12:22:46,753 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 12:22:46,756 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 12:22:46,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 12:22:46,818 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 12:22:46,822 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 12:22:46,825 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 12:22:46,829 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 12:22:46,832 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 12:22:46,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 12:22:46,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 12:22:46,841 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 12:22:46,842 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 12:22:46,845 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 12:22:46,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 12:22:46,855 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 12:22:46,858 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 12:22:46,859 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 12:22:46,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 12:22:46,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 12:22:46,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 12:22:46,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 12:22:46,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 12:22:46,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 12:22:46,885 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 12:22:46,886 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 12:22:46,886 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 12:22:46,889 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 12:22:46,890 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 12:22:46,891 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 12:22:46,892 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 12:22:46,893 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 12:22:46,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 12:22:46,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 12:22:46,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 12:22:46,900 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 12:22:46,901 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 12:22:46,901 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 12:22:46,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 12:22:46,903 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 12:22:46,903 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 12:22:46,905 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-23 12:22:46,951 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 12:22:46,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 12:22:46,952 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 12:22:46,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 12:22:46,954 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 12:22:46,954 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 12:22:46,955 INFO L138 SettingsManager]: * Use SBE=true [2021-11-23 12:22:46,955 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 12:22:46,955 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 12:22:46,955 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 12:22:46,957 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 12:22:46,957 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 12:22:46,957 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 12:22:46,957 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 12:22:46,958 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 12:22:46,958 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 12:22:46,958 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 12:22:46,958 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 12:22:46,959 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 12:22:46,959 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 12:22:46,959 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 12:22:46,959 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 12:22:46,960 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:22:46,960 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 12:22:46,960 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 12:22:46,960 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 12:22:46,961 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-23 12:22:46,961 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 12:22:46,961 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-23 12:22:46,963 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-23 12:22:46,963 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 12:22:46,963 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 12:22:46,964 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_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 981715b042dc751421769388e93842bdf7028c46e115693f476b30e4e763298a [2021-11-23 12:22:47,217 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 12:22:47,241 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 12:22:47,244 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 12:22:47,246 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 12:22:47,246 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 12:22:47,248 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/../../sv-benchmarks/c/array-crafted/mapsum2.i [2021-11-23 12:22:47,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/data/6ca12d73e/7df423ca417d48d88233548f829ef478/FLAG1ee0ee6a4 [2021-11-23 12:22:47,786 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 12:22:47,787 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/sv-benchmarks/c/array-crafted/mapsum2.i [2021-11-23 12:22:47,794 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/data/6ca12d73e/7df423ca417d48d88233548f829ef478/FLAG1ee0ee6a4 [2021-11-23 12:22:48,163 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/data/6ca12d73e/7df423ca417d48d88233548f829ef478 [2021-11-23 12:22:48,165 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 12:22:48,166 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 12:22:48,175 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 12:22:48,175 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 12:22:48,178 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 12:22:48,179 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,180 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71cb349c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48, skipping insertion in model container [2021-11-23 12:22:48,181 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,190 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 12:22:48,209 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 12:22:48,408 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_64dc945d-38b2-4fe2-bf9f-47282aa153d7/sv-benchmarks/c/array-crafted/mapsum2.i[1306,1319] [2021-11-23 12:22:48,411 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:22:48,418 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 12:22:48,438 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_64dc945d-38b2-4fe2-bf9f-47282aa153d7/sv-benchmarks/c/array-crafted/mapsum2.i[1306,1319] [2021-11-23 12:22:48,439 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 12:22:48,452 INFO L208 MainTranslator]: Completed translation [2021-11-23 12:22:48,453 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48 WrapperNode [2021-11-23 12:22:48,453 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 12:22:48,454 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 12:22:48,454 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 12:22:48,454 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 12:22:48,461 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,499 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 118 [2021-11-23 12:22:48,499 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 12:22:48,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 12:22:48,502 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 12:22:48,502 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 12:22:48,510 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,511 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,532 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,549 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,551 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,554 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 12:22:48,555 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 12:22:48,565 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 12:22:48,565 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 12:22:48,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (1/1) ... [2021-11-23 12:22:48,578 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 12:22:48,588 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:48,601 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 12:22:48,630 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 12:22:48,668 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 12:22:48,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 12:22:48,669 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-23 12:22:48,669 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-23 12:22:48,669 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 12:22:48,669 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 12:22:48,669 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-23 12:22:48,670 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 12:22:48,753 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 12:22:48,755 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 12:22:49,055 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 12:22:49,061 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 12:22:49,061 INFO L301 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-23 12:22:49,063 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:22:49 BoogieIcfgContainer [2021-11-23 12:22:49,063 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 12:22:49,065 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 12:22:49,065 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 12:22:49,069 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 12:22:49,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 12:22:48" (1/3) ... [2021-11-23 12:22:49,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ae16bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:22:49, skipping insertion in model container [2021-11-23 12:22:49,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 12:22:48" (2/3) ... [2021-11-23 12:22:49,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56ae16bf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 12:22:49, skipping insertion in model container [2021-11-23 12:22:49,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 12:22:49" (3/3) ... [2021-11-23 12:22:49,073 INFO L111 eAbstractionObserver]: Analyzing ICFG mapsum2.i [2021-11-23 12:22:49,078 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 12:22:49,079 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 12:22:49,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 12:22:49,134 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, 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, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 12:22:49,134 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 12:22:49,150 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:49,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-23 12:22:49,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:49,156 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:49,157 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:49,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:49,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-11-23 12:22:49,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:49,173 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079901177] [2021-11-23 12:22:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:49,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:49,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:22:49,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:49,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079901177] [2021-11-23 12:22:49,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079901177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:22:49,382 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 12:22:49,382 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 12:22:49,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982108544] [2021-11-23 12:22:49,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:22:49,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:22:49,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:22:49,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:22:49,445 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:49,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:49,491 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-23 12:22:49,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:22:49,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-23 12:22:49,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:49,505 INFO L225 Difference]: With dead ends: 52 [2021-11-23 12:22:49,505 INFO L226 Difference]: Without dead ends: 25 [2021-11-23 12:22:49,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 12:22:49,515 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 56 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 [2021-11-23 12:22:49,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 56 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:22:49,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-23 12:22:49,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-23 12:22:49,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:49,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-23 12:22:49,558 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-11-23 12:22:49,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:49,558 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-23 12:22:49,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:49,561 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-23 12:22:49,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 12:22:49,563 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:49,563 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:49,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 12:22:49,564 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:49,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:49,568 INFO L85 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-11-23 12:22:49,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:49,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893605128] [2021-11-23 12:22:49,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:49,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:49,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:49,682 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 12:22:49,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:49,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893605128] [2021-11-23 12:22:49,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893605128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:49,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511296405] [2021-11-23 12:22:49,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:49,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:49,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:49,692 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:49,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 12:22:49,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:49,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:22:49,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 12:22:49,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:22:49,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511296405] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:22:49,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:22:49,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 12:22:49,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810153361] [2021-11-23 12:22:49,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:22:49,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:22:49,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:49,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:22:49,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:22:49,824 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:49,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:49,857 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-23 12:22:49,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:22:49,858 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-23 12:22:49,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:49,859 INFO L225 Difference]: With dead ends: 46 [2021-11-23 12:22:49,860 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 12:22:49,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:22:49,862 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 3 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:22:49,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 36 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:22:49,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 12:22:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-11-23 12:22:49,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:49,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-23 12:22:49,870 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-11-23 12:22:49,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:49,871 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-23 12:22:49,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:49,872 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-23 12:22:49,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-23 12:22:49,873 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:49,873 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:49,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 12:22:50,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-23 12:22:50,100 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:50,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:50,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-11-23 12:22:50,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:50,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079233391] [2021-11-23 12:22:50,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:50,102 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:50,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 12:22:50,148 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:50,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079233391] [2021-11-23 12:22:50,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079233391] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:50,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505492941] [2021-11-23 12:22:50,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:50,149 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:50,149 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:50,150 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:50,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 12:22:50,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:50,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 12:22:50,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:50,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:22:50,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 12:22:50,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [505492941] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 12:22:50,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 12:22:50,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-23 12:22:50,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737319722] [2021-11-23 12:22:50,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 12:22:50,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 12:22:50,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:50,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 12:22:50,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:22:50,268 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:50,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:50,281 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-23 12:22:50,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 12:22:50,281 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-23 12:22:50,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:50,282 INFO L225 Difference]: With dead ends: 38 [2021-11-23 12:22:50,282 INFO L226 Difference]: Without dead ends: 29 [2021-11-23 12:22:50,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 12:22:50,284 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 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 [2021-11-23 12:22:50,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:22:50,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-23 12:22:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-23 12:22:50,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-23 12:22:50,291 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-23 12:22:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:50,292 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-23 12:22:50,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:50,292 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-23 12:22:50,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 12:22:50,293 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:50,293 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:50,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 12:22:50,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:50,514 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:50,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:50,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-11-23 12:22:50,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:50,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394308059] [2021-11-23 12:22:50,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:50,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:50,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:22:50,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:50,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394308059] [2021-11-23 12:22:50,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394308059] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:50,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602917677] [2021-11-23 12:22:50,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:50,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:50,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:50,584 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:50,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 12:22:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:22:50,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:50,785 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:22:50,785 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:22:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:22:50,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602917677] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:22:50,868 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:22:50,868 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 12:22:50,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879335746] [2021-11-23 12:22:50,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:22:50,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:22:50,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:22:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:22:50,871 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:50,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:50,909 INFO L93 Difference]: Finished difference Result 57 states and 67 transitions. [2021-11-23 12:22:50,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:22:50,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-23 12:22:50,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:50,911 INFO L225 Difference]: With dead ends: 57 [2021-11-23 12:22:50,911 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 12:22:50,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:22:50,914 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:22:50,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 71 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:22:50,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 12:22:50,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-23 12:22:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2021-11-23 12:22:50,921 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 27 [2021-11-23 12:22:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:50,922 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2021-11-23 12:22:50,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:50,922 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2021-11-23 12:22:50,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-23 12:22:50,923 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:50,923 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:50,960 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-23 12:22:51,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:51,144 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:51,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:51,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1267081640, now seen corresponding path program 2 times [2021-11-23 12:22:51,145 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:51,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556182772] [2021-11-23 12:22:51,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:51,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:51,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 12:22:51,214 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:51,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556182772] [2021-11-23 12:22:51,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556182772] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:51,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778250221] [2021-11-23 12:22:51,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:22:51,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:51,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:51,231 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:51,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 12:22:51,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:22:51,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:22:51,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:22:51,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:22:51,429 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:22:51,580 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 12:22:51,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778250221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:22:51,581 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:22:51,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-11-23 12:22:51,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467354673] [2021-11-23 12:22:51,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:22:51,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-23 12:22:51,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:51,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-23 12:22:51,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:22:51,586 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:51,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:51,715 INFO L93 Difference]: Finished difference Result 78 states and 94 transitions. [2021-11-23 12:22:51,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 12:22:51,716 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-23 12:22:51,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:51,719 INFO L225 Difference]: With dead ends: 78 [2021-11-23 12:22:51,720 INFO L226 Difference]: Without dead ends: 55 [2021-11-23 12:22:51,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-11-23 12:22:51,724 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 23 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:22:51,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 66 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:22:51,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-11-23 12:22:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2021-11-23 12:22:51,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0980392156862746) internal successors, (56), 51 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:51,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2021-11-23 12:22:51,745 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 33 [2021-11-23 12:22:51,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:51,745 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2021-11-23 12:22:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2021-11-23 12:22:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-23 12:22:51,748 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:51,749 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:51,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 12:22:51,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:51,968 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:51,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:51,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1849229898, now seen corresponding path program 3 times [2021-11-23 12:22:51,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:51,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566989779] [2021-11-23 12:22:51,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:51,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:52,101 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 12:22:52,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:52,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566989779] [2021-11-23 12:22:52,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566989779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:52,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90152600] [2021-11-23 12:22:52,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:22:52,104 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:52,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:52,105 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:52,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 12:22:52,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 12:22:52,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:22:52,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 12:22:52,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:52,270 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 12:22:52,270 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:22:52,347 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-23 12:22:52,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90152600] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:22:52,348 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:22:52,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-11-23 12:22:52,349 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59492661] [2021-11-23 12:22:52,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:22:52,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 12:22:52,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 12:22:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:22:52,351 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:52,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:52,389 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-11-23 12:22:52,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 12:22:52,391 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-23 12:22:52,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:52,393 INFO L225 Difference]: With dead ends: 69 [2021-11-23 12:22:52,393 INFO L226 Difference]: Without dead ends: 58 [2021-11-23 12:22:52,393 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-23 12:22:52,394 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 4 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 12:22:52,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 12:22:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-23 12:22:52,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-23 12:22:52,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.087719298245614) internal successors, (62), 57 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:52,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 62 transitions. [2021-11-23 12:22:52,403 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 62 transitions. Word has length 51 [2021-11-23 12:22:52,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:52,403 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 62 transitions. [2021-11-23 12:22:52,404 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:52,404 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 62 transitions. [2021-11-23 12:22:52,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 12:22:52,406 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:52,406 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:52,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 12:22:52,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:52,625 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:52,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:52,626 INFO L85 PathProgramCache]: Analyzing trace with hash -790181948, now seen corresponding path program 4 times [2021-11-23 12:22:52,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:52,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374119986] [2021-11-23 12:22:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:52,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 12:22:52,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:52,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374119986] [2021-11-23 12:22:52,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374119986] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:52,857 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64151120] [2021-11-23 12:22:52,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:22:52,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:52,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:52,864 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:52,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 12:22:52,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:22:52,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:22:52,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 12:22:52,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-23 12:22:53,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:22:53,158 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-23 12:22:53,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64151120] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:22:53,158 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:22:53,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2021-11-23 12:22:53,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277078060] [2021-11-23 12:22:53,159 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:22:53,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-23 12:22:53,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:53,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-23 12:22:53,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:22:53,162 INFO L87 Difference]: Start difference. First operand 58 states and 62 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:53,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:53,305 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2021-11-23 12:22:53,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 12:22:53,305 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-11-23 12:22:53,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:53,311 INFO L225 Difference]: With dead ends: 120 [2021-11-23 12:22:53,311 INFO L226 Difference]: Without dead ends: 85 [2021-11-23 12:22:53,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-11-23 12:22:53,313 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 44 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:22:53,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 126 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:22:53,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-23 12:22:53,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2021-11-23 12:22:53,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:53,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 88 transitions. [2021-11-23 12:22:53,349 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 88 transitions. Word has length 57 [2021-11-23 12:22:53,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:53,349 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 88 transitions. [2021-11-23 12:22:53,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 19 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:53,349 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 88 transitions. [2021-11-23 12:22:53,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-11-23 12:22:53,352 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:53,352 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:53,389 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 12:22:53,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:53,557 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:53,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:53,557 INFO L85 PathProgramCache]: Analyzing trace with hash 38809594, now seen corresponding path program 5 times [2021-11-23 12:22:53,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:53,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393412381] [2021-11-23 12:22:53,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:53,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:53,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-23 12:22:53,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:53,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393412381] [2021-11-23 12:22:53,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393412381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:53,744 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264258923] [2021-11-23 12:22:53,744 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:22:53,745 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:53,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:53,746 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:53,764 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 12:22:54,024 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-23 12:22:54,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:22:54,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 12:22:54,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:54,238 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-23 12:22:54,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:22:54,524 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2021-11-23 12:22:54,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264258923] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:22:54,525 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:22:54,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 9, 9] total 28 [2021-11-23 12:22:54,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171422770] [2021-11-23 12:22:54,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:22:54,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-23 12:22:54,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:54,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-23 12:22:54,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-11-23 12:22:54,527 INFO L87 Difference]: Start difference. First operand 84 states and 88 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:54,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:54,817 INFO L93 Difference]: Finished difference Result 194 states and 226 transitions. [2021-11-23 12:22:54,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-23 12:22:54,818 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2021-11-23 12:22:54,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:54,819 INFO L225 Difference]: With dead ends: 194 [2021-11-23 12:22:54,820 INFO L226 Difference]: Without dead ends: 135 [2021-11-23 12:22:54,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2021-11-23 12:22:54,822 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 113 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:22:54,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 96 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:22:54,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-11-23 12:22:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 134. [2021-11-23 12:22:54,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-11-23 12:22:54,835 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 83 [2021-11-23 12:22:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:54,836 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-11-23 12:22:54,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 28 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:54,837 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-11-23 12:22:54,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-23 12:22:54,838 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:54,839 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 12, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:54,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 12:22:55,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-23 12:22:55,064 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:55,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:55,065 INFO L85 PathProgramCache]: Analyzing trace with hash 713910696, now seen corresponding path program 6 times [2021-11-23 12:22:55,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:55,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571791964] [2021-11-23 12:22:55,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:55,065 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 604 trivial. 0 not checked. [2021-11-23 12:22:55,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:55,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571791964] [2021-11-23 12:22:55,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571791964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:55,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576926030] [2021-11-23 12:22:55,319 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-23 12:22:55,319 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:55,319 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:55,332 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:55,334 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 12:22:55,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-23 12:22:55,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:22:55,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 12:22:55,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-11-23 12:22:56,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:22:56,501 INFO L134 CoverageAnalysis]: Checked inductivity of 748 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 732 trivial. 0 not checked. [2021-11-23 12:22:56,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576926030] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:22:56,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:22:56,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 7, 7] total 25 [2021-11-23 12:22:56,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921651522] [2021-11-23 12:22:56,507 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:22:56,508 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-23 12:22:56,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:56,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-23 12:22:56,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:22:56,510 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:56,627 INFO L93 Difference]: Finished difference Result 256 states and 270 transitions. [2021-11-23 12:22:56,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 12:22:56,628 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-23 12:22:56,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:56,629 INFO L225 Difference]: With dead ends: 256 [2021-11-23 12:22:56,629 INFO L226 Difference]: Without dead ends: 149 [2021-11-23 12:22:56,633 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-11-23 12:22:56,635 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:22:56,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 147 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:22:56,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-23 12:22:56,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2021-11-23 12:22:56,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:56,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-11-23 12:22:56,661 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 133 [2021-11-23 12:22:56,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:56,663 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-11-23 12:22:56,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 25 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:56,664 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-11-23 12:22:56,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 12:22:56,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:56,671 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:56,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 12:22:56,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:56,888 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:56,889 INFO L85 PathProgramCache]: Analyzing trace with hash -645004454, now seen corresponding path program 7 times [2021-11-23 12:22:56,889 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:56,889 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719307646] [2021-11-23 12:22:56,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:56,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:57,132 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-23 12:22:57,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:57,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719307646] [2021-11-23 12:22:57,132 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719307646] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:57,133 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447375530] [2021-11-23 12:22:57,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-23 12:22:57,133 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:57,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:57,134 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:57,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 12:22:57,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:57,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 12:22:57,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:57,502 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-23 12:22:57,502 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:22:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-23 12:22:58,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1447375530] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:22:58,053 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:22:58,053 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 31 [2021-11-23 12:22:58,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747100367] [2021-11-23 12:22:58,054 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:22:58,054 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 12:22:58,054 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:22:58,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 12:22:58,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-23 12:22:58,056 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:58,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:22:58,166 INFO L93 Difference]: Finished difference Result 297 states and 319 transitions. [2021-11-23 12:22:58,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-23 12:22:58,167 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-23 12:22:58,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:22:58,168 INFO L225 Difference]: With dead ends: 297 [2021-11-23 12:22:58,168 INFO L226 Difference]: Without dead ends: 178 [2021-11-23 12:22:58,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-23 12:22:58,171 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 42 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 12:22:58,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 140 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 12:22:58,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-23 12:22:58,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 178. [2021-11-23 12:22:58,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:58,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-11-23 12:22:58,185 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 147 [2021-11-23 12:22:58,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:22:58,186 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-11-23 12:22:58,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:22:58,186 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-11-23 12:22:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-23 12:22:58,192 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:22:58,192 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:22:58,230 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 12:22:58,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:58,407 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:22:58,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:22:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1078903804, now seen corresponding path program 8 times [2021-11-23 12:22:58,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:22:58,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428310805] [2021-11-23 12:22:58,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:22:58,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:22:58,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:22:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-23 12:22:58,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:22:58,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428310805] [2021-11-23 12:22:58,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428310805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:22:58,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286825739] [2021-11-23 12:22:58,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-23 12:22:58,922 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:22:58,922 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:22:58,923 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:22:58,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 12:22:59,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-23 12:22:59,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:22:59,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-23 12:22:59,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:22:59,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-23 12:22:59,377 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:00,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1472 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-23 12:23:00,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286825739] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:00,664 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:00,665 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2021-11-23 12:23:00,665 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617689295] [2021-11-23 12:23:00,665 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:00,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-23 12:23:00,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:00,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-23 12:23:00,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 12:23:00,672 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:00,921 INFO L93 Difference]: Finished difference Result 357 states and 394 transitions. [2021-11-23 12:23:00,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-23 12:23:00,922 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-23 12:23:00,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:00,924 INFO L225 Difference]: With dead ends: 357 [2021-11-23 12:23:00,924 INFO L226 Difference]: Without dead ends: 238 [2021-11-23 12:23:00,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 324 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-23 12:23:00,927 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:00,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 163 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:23:00,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-23 12:23:00,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2021-11-23 12:23:00,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.021097046413502) internal successors, (242), 237 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 242 transitions. [2021-11-23 12:23:00,937 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 242 transitions. Word has length 177 [2021-11-23 12:23:00,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:00,938 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 242 transitions. [2021-11-23 12:23:00,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.3278688524590163) internal successors, (142), 61 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 242 transitions. [2021-11-23 12:23:00,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-23 12:23:00,941 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:00,942 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 14, 14, 14, 14, 14, 14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:00,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:01,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:01,161 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:01,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:01,162 INFO L85 PathProgramCache]: Analyzing trace with hash 639536832, now seen corresponding path program 9 times [2021-11-23 12:23:01,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:01,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910863416] [2021-11-23 12:23:01,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:01,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:01,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:02,862 INFO L134 CoverageAnalysis]: Checked inductivity of 4052 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2021-11-23 12:23:02,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910863416] [2021-11-23 12:23:02,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910863416] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:02,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622576359] [2021-11-23 12:23:02,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 12:23:02,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:02,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:02,868 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:02,894 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 12:23:03,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-23 12:23:03,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:03,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 12:23:03,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:04,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4052 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3952 trivial. 0 not checked. [2021-11-23 12:23:04,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4052 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 3952 trivial. 0 not checked. [2021-11-23 12:23:05,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622576359] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:05,400 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:05,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 13, 13] total 83 [2021-11-23 12:23:05,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991942066] [2021-11-23 12:23:05,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:05,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-23 12:23:05,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:05,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-23 12:23:05,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2105, Invalid=4701, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 12:23:05,406 INFO L87 Difference]: Start difference. First operand 238 states and 242 transitions. Second operand has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:05,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:05,725 INFO L93 Difference]: Finished difference Result 384 states and 404 transitions. [2021-11-23 12:23:05,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-23 12:23:05,726 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 237 [2021-11-23 12:23:05,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:05,729 INFO L225 Difference]: With dead ends: 384 [2021-11-23 12:23:05,729 INFO L226 Difference]: Without dead ends: 265 [2021-11-23 12:23:05,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 533 GetRequests, 452 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2105, Invalid=4701, Unknown=0, NotChecked=0, Total=6806 [2021-11-23 12:23:05,733 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 92 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:05,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 208 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 12:23:05,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-11-23 12:23:05,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2021-11-23 12:23:05,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.0190114068441065) internal successors, (268), 263 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:05,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 268 transitions. [2021-11-23 12:23:05,772 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 268 transitions. Word has length 237 [2021-11-23 12:23:05,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:05,774 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 268 transitions. [2021-11-23 12:23:05,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.397590361445783) internal successors, (199), 83 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:05,774 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 268 transitions. [2021-11-23 12:23:05,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2021-11-23 12:23:05,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:05,779 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 22, 22, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:05,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:05,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-23 12:23:05,984 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:05,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:05,985 INFO L85 PathProgramCache]: Analyzing trace with hash -624080410, now seen corresponding path program 10 times [2021-11-23 12:23:05,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:05,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400591060] [2021-11-23 12:23:05,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:05,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:06,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:07,751 INFO L134 CoverageAnalysis]: Checked inductivity of 4553 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-23 12:23:07,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:07,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400591060] [2021-11-23 12:23:07,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400591060] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:07,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404160868] [2021-11-23 12:23:07,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 12:23:07,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:07,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:07,756 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:07,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 12:23:07,920 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 12:23:07,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 12:23:07,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 752 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-23 12:23:07,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 12:23:08,508 INFO L134 CoverageAnalysis]: Checked inductivity of 4553 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-23 12:23:08,509 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 12:23:12,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4553 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-23 12:23:12,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404160868] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 12:23:12,767 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 12:23:12,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62, 62] total 123 [2021-11-23 12:23:12,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660002626] [2021-11-23 12:23:12,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 12:23:12,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-23 12:23:12,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-23 12:23:12,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-23 12:23:12,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-23 12:23:12,776 INFO L87 Difference]: Start difference. First operand 264 states and 268 transitions. Second operand has 123 states, 123 states have (on average 2.16260162601626) internal successors, (266), 123 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:13,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 12:23:13,311 INFO L93 Difference]: Finished difference Result 529 states and 597 transitions. [2021-11-23 12:23:13,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-23 12:23:13,313 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.16260162601626) internal successors, (266), 123 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 263 [2021-11-23 12:23:13,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 12:23:13,316 INFO L225 Difference]: With dead ends: 529 [2021-11-23 12:23:13,316 INFO L226 Difference]: Without dead ends: 386 [2021-11-23 12:23:13,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 586 GetRequests, 465 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-23 12:23:13,322 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 180 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 12:23:13,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 163 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 12:23:13,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-11-23 12:23:13,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 386. [2021-11-23 12:23:13,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 1.0129870129870129) internal successors, (390), 385 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:13,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 390 transitions. [2021-11-23 12:23:13,337 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 390 transitions. Word has length 263 [2021-11-23 12:23:13,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 12:23:13,337 INFO L470 AbstractCegarLoop]: Abstraction has 386 states and 390 transitions. [2021-11-23 12:23:13,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.16260162601626) internal successors, (266), 123 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 12:23:13,338 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 390 transitions. [2021-11-23 12:23:13,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 386 [2021-11-23 12:23:13,344 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 12:23:13,345 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 22, 22, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 12:23:13,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 12:23:13,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 12:23:13,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 12:23:13,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 12:23:13,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1601834540, now seen corresponding path program 11 times [2021-11-23 12:23:13,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-23 12:23:13,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898072526] [2021-11-23 12:23:13,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 12:23:13,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 12:23:13,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 12:23:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 15472 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 1072 trivial. 0 not checked. [2021-11-23 12:23:18,933 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-23 12:23:18,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898072526] [2021-11-23 12:23:18,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898072526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 12:23:18,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931447163] [2021-11-23 12:23:18,934 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-23 12:23:18,934 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 12:23:18,934 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 [2021-11-23 12:23:18,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 12:23:18,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_64dc945d-38b2-4fe2-bf9f-47282aa153d7/bin/uautomizer-wIGwrQj20G/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process