./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/byte_add_2-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa --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 de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:57:02,189 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:57:02,191 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:57:02,213 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:57:02,213 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:57:02,214 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:57:02,215 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:57:02,217 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:57:02,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:57:02,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:57:02,220 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:57:02,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:57:02,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:57:02,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:57:02,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:57:02,225 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:57:02,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:57:02,226 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:57:02,228 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:57:02,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:57:02,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:57:02,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:57:02,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:57:02,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:57:02,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:57:02,237 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:57:02,237 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:57:02,238 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:57:02,239 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:57:02,240 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:57:02,240 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:57:02,240 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:57:02,241 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:57:02,242 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:57:02,242 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:57:02,243 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:57:02,243 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:57:02,243 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:57:02,243 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:57:02,244 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:57:02,244 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:57:02,245 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-07 00:57:02,263 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:57:02,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:57:02,263 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:57:02,263 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:57:02,264 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:57:02,264 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:57:02,264 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:57:02,264 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:57:02,264 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:57:02,264 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:57:02,265 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:57:02,266 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:57:02,266 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:57:02,266 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:57:02,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:57:02,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:57:02,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:57:02,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:57:02,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:57:02,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:57:02,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-07 00:57:02,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-07 00:57:02,267 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:57:02,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:57:02,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:57:02,267 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:57:02,267 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_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba [2021-12-07 00:57:02,465 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:57:02,481 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:57:02,482 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:57:02,483 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:57:02,484 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:57:02,485 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-12-07 00:57:02,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data/2e69709fa/aa9916374f1442429fb416f4b0d1c4f4/FLAG45a4ab161 [2021-12-07 00:57:02,946 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:57:02,946 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-12-07 00:57:02,952 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data/2e69709fa/aa9916374f1442429fb416f4b0d1c4f4/FLAG45a4ab161 [2021-12-07 00:57:02,961 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data/2e69709fa/aa9916374f1442429fb416f4b0d1c4f4 [2021-12-07 00:57:02,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:57:02,964 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:57:02,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:57:02,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:57:02,968 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:57:02,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:57:02" (1/1) ... [2021-12-07 00:57:02,969 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6373599e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:02, skipping insertion in model container [2021-12-07 00:57:02,969 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:57:02" (1/1) ... [2021-12-07 00:57:02,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:57:02,989 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:57:03,096 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_030f898e-3cd5-4dcb-a868-51a867249742/sv-benchmarks/c/bitvector/byte_add_2-2.i[1168,1181] [2021-12-07 00:57:03,120 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:57:03,126 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:57:03,135 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_030f898e-3cd5-4dcb-a868-51a867249742/sv-benchmarks/c/bitvector/byte_add_2-2.i[1168,1181] [2021-12-07 00:57:03,150 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:57:03,160 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:57:03,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03 WrapperNode [2021-12-07 00:57:03,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:57:03,161 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:57:03,161 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:57:03,161 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:57:03,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,173 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,191 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-12-07 00:57:03,191 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:57:03,192 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:57:03,192 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:57:03,192 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:57:03,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,205 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,209 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,211 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,213 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:57:03,213 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:57:03,214 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:57:03,214 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:57:03,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (1/1) ... [2021-12-07 00:57:03,220 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:57:03,230 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:03,240 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:57:03,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:57:03,276 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:57:03,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-07 00:57:03,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:57:03,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:57:03,327 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:57:03,328 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:57:03,508 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:57:03,513 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:57:03,514 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 00:57:03,515 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:57:03 BoogieIcfgContainer [2021-12-07 00:57:03,515 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:57:03,516 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:57:03,517 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:57:03,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:57:03,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:57:02" (1/3) ... [2021-12-07 00:57:03,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7fce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:57:03, skipping insertion in model container [2021-12-07 00:57:03,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:03" (2/3) ... [2021-12-07 00:57:03,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f7fce6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:57:03, skipping insertion in model container [2021-12-07 00:57:03,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:57:03" (3/3) ... [2021-12-07 00:57:03,521 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2021-12-07 00:57:03,525 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:57:03,525 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:57:03,559 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:57:03,565 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 [2021-12-07 00:57:03,565 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:57:03,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:03,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:57:03,581 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:03,581 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:03,582 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:03,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:03,587 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-12-07 00:57:03,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:03,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759414289] [2021-12-07 00:57:03,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:03,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:03,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,699 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:03,699 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:03,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759414289] [2021-12-07 00:57:03,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759414289] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:03,700 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:03,700 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:57:03,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387983246] [2021-12-07 00:57:03,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:03,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:57:03,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:03,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:57:03,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:57:03,735 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:03,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:03,751 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-12-07 00:57:03,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:57:03,753 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-07 00:57:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:03,762 INFO L225 Difference]: With dead ends: 57 [2021-12-07 00:57:03,762 INFO L226 Difference]: Without dead ends: 38 [2021-12-07 00:57:03,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:57:03,768 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:03,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:57:03,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-07 00:57:03,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-07 00:57:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 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) [2021-12-07 00:57:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-12-07 00:57:03,800 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-12-07 00:57:03,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:03,800 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-12-07 00:57:03,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:03,801 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-12-07 00:57:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:57:03,801 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:03,801 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:03,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-07 00:57:03,802 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:03,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:03,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-12-07 00:57:03,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:03,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878292069] [2021-12-07 00:57:03,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:03,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:03,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:03,876 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:03,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878292069] [2021-12-07 00:57:03,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878292069] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:03,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:03,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:57:03,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631937280] [2021-12-07 00:57:03,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:03,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:57:03,878 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:03,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:57:03,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:03,878 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:03,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:03,984 INFO L93 Difference]: Finished difference Result 89 states and 156 transitions. [2021-12-07 00:57:03,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:57:03,985 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-07 00:57:03,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:03,986 INFO L225 Difference]: With dead ends: 89 [2021-12-07 00:57:03,986 INFO L226 Difference]: Without dead ends: 61 [2021-12-07 00:57:03,987 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:03,988 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 24 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:03,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 59 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:03,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-07 00:57:03,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-12-07 00:57:03,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.5344827586206897) internal successors, (89), 58 states have internal predecessors, (89), 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) [2021-12-07 00:57:03,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 89 transitions. [2021-12-07 00:57:04,000 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 89 transitions. Word has length 12 [2021-12-07 00:57:04,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:04,000 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 89 transitions. [2021-12-07 00:57:04,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:04,000 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 89 transitions. [2021-12-07 00:57:04,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-12-07 00:57:04,001 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:04,002 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:04,002 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-07 00:57:04,002 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:04,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:04,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1336656122, now seen corresponding path program 1 times [2021-12-07 00:57:04,003 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:04,003 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717708875] [2021-12-07 00:57:04,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:57:04,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:04,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717708875] [2021-12-07 00:57:04,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717708875] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:04,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:04,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:57:04,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035542956] [2021-12-07 00:57:04,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:04,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:57:04,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:04,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:57:04,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:57:04,102 INFO L87 Difference]: Start difference. First operand 59 states and 89 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:04,234 INFO L93 Difference]: Finished difference Result 143 states and 218 transitions. [2021-12-07 00:57:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:57:04,235 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-12-07 00:57:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:04,236 INFO L225 Difference]: With dead ends: 143 [2021-12-07 00:57:04,236 INFO L226 Difference]: Without dead ends: 105 [2021-12-07 00:57:04,237 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:04,238 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 85 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:04,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 156 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:04,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-12-07 00:57:04,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 67. [2021-12-07 00:57:04,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4848484848484849) internal successors, (98), 66 states have internal predecessors, (98), 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) [2021-12-07 00:57:04,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 98 transitions. [2021-12-07 00:57:04,245 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 98 transitions. Word has length 18 [2021-12-07 00:57:04,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:04,246 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 98 transitions. [2021-12-07 00:57:04,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:04,246 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 98 transitions. [2021-12-07 00:57:04,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-07 00:57:04,247 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:04,247 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:04,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-07 00:57:04,247 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:04,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:04,248 INFO L85 PathProgramCache]: Analyzing trace with hash -640429161, now seen corresponding path program 1 times [2021-12-07 00:57:04,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:04,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113240587] [2021-12-07 00:57:04,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:04,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:57:04,304 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:04,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113240587] [2021-12-07 00:57:04,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113240587] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:04,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:04,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:57:04,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316423630] [2021-12-07 00:57:04,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:04,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:57:04,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:04,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:57:04,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:04,311 INFO L87 Difference]: Start difference. First operand 67 states and 98 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) [2021-12-07 00:57:04,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:04,316 INFO L93 Difference]: Finished difference Result 104 states and 156 transitions. [2021-12-07 00:57:04,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:57:04,317 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 [2021-12-07 00:57:04,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:04,318 INFO L225 Difference]: With dead ends: 104 [2021-12-07 00:57:04,318 INFO L226 Difference]: Without dead ends: 52 [2021-12-07 00:57:04,318 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 [2021-12-07 00:57:04,320 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 55 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:04,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:57:04,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-12-07 00:57:04,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-12-07 00:57:04,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 51 states have internal predecessors, (77), 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) [2021-12-07 00:57:04,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 77 transitions. [2021-12-07 00:57:04,327 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 77 transitions. Word has length 19 [2021-12-07 00:57:04,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:04,327 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 77 transitions. [2021-12-07 00:57:04,328 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) [2021-12-07 00:57:04,328 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 77 transitions. [2021-12-07 00:57:04,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:57:04,329 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:04,329 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] [2021-12-07 00:57:04,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-07 00:57:04,329 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:04,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:04,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1480128500, now seen corresponding path program 1 times [2021-12-07 00:57:04,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:04,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136778908] [2021-12-07 00:57:04,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,376 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:04,377 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:04,377 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136778908] [2021-12-07 00:57:04,377 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136778908] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:04,377 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:04,377 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:57:04,377 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663520883] [2021-12-07 00:57:04,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:04,378 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:57:04,378 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:04,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:57:04,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:04,379 INFO L87 Difference]: Start difference. First operand 52 states and 77 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) [2021-12-07 00:57:04,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:04,388 INFO L93 Difference]: Finished difference Result 73 states and 107 transitions. [2021-12-07 00:57:04,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:57:04,388 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 [2021-12-07 00:57:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:04,389 INFO L225 Difference]: With dead ends: 73 [2021-12-07 00:57:04,390 INFO L226 Difference]: Without dead ends: 62 [2021-12-07 00:57:04,390 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 [2021-12-07 00:57:04,391 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 4 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 113 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 [2021-12-07 00:57:04,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 113 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:57:04,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-07 00:57:04,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-07 00:57:04,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.4918032786885247) internal successors, (91), 61 states have internal predecessors, (91), 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) [2021-12-07 00:57:04,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 91 transitions. [2021-12-07 00:57:04,399 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 91 transitions. Word has length 25 [2021-12-07 00:57:04,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:04,399 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 91 transitions. [2021-12-07 00:57:04,400 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) [2021-12-07 00:57:04,400 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 91 transitions. [2021-12-07 00:57:04,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:57:04,401 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:04,401 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] [2021-12-07 00:57:04,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-07 00:57:04,401 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:04,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:04,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1738293938, now seen corresponding path program 1 times [2021-12-07 00:57:04,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:04,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823106028] [2021-12-07 00:57:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:04,495 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:04,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823106028] [2021-12-07 00:57:04,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823106028] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:04,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:04,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:57:04,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114631371] [2021-12-07 00:57:04,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:04,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:57:04,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:04,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:57:04,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:57:04,496 INFO L87 Difference]: Start difference. First operand 62 states and 91 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-12-07 00:57:04,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:04,600 INFO L93 Difference]: Finished difference Result 169 states and 249 transitions. [2021-12-07 00:57:04,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:57:04,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 [2021-12-07 00:57:04,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:04,601 INFO L225 Difference]: With dead ends: 169 [2021-12-07 00:57:04,601 INFO L226 Difference]: Without dead ends: 121 [2021-12-07 00:57:04,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:04,602 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 82 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:04,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 150 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:04,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-12-07 00:57:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 67. [2021-12-07 00:57:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 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) [2021-12-07 00:57:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 96 transitions. [2021-12-07 00:57:04,608 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 96 transitions. Word has length 25 [2021-12-07 00:57:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:04,608 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 96 transitions. [2021-12-07 00:57:04,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-12-07 00:57:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 96 transitions. [2021-12-07 00:57:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:57:04,609 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:04,609 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] [2021-12-07 00:57:04,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-07 00:57:04,609 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:04,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:04,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1125876944, now seen corresponding path program 1 times [2021-12-07 00:57:04,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:04,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751374640] [2021-12-07 00:57:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,649 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:04,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751374640] [2021-12-07 00:57:04,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751374640] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:04,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116046869] [2021-12-07 00:57:04,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:04,649 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:04,649 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:04,650 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:04,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-07 00:57:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:04,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:57:04,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:04,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:04,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116046869] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:04,844 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:57:04,844 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-12-07 00:57:04,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614861039] [2021-12-07 00:57:04,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:04,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:57:04,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:04,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:57:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:57:04,845 INFO L87 Difference]: Start difference. First operand 67 states and 96 transitions. Second operand has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2021-12-07 00:57:04,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:04,979 INFO L93 Difference]: Finished difference Result 153 states and 251 transitions. [2021-12-07 00:57:04,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:57:04,979 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-07 00:57:04,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:04,980 INFO L225 Difference]: With dead ends: 153 [2021-12-07 00:57:04,980 INFO L226 Difference]: Without dead ends: 119 [2021-12-07 00:57:04,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:57:04,982 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 37 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:04,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 59 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:04,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-07 00:57:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 103. [2021-12-07 00:57:04,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.3431372549019607) internal successors, (137), 102 states have internal predecessors, (137), 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) [2021-12-07 00:57:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 137 transitions. [2021-12-07 00:57:04,990 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 137 transitions. Word has length 26 [2021-12-07 00:57:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:04,990 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 137 transitions. [2021-12-07 00:57:04,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 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) [2021-12-07 00:57:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 137 transitions. [2021-12-07 00:57:04,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-07 00:57:04,992 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:04,992 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, 1, 1, 1, 1, 1] [2021-12-07 00:57:05,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:05,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:05,194 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:05,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:05,195 INFO L85 PathProgramCache]: Analyzing trace with hash 801426209, now seen corresponding path program 1 times [2021-12-07 00:57:05,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:05,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965136363] [2021-12-07 00:57:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:05,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:05,402 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965136363] [2021-12-07 00:57:05,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965136363] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:05,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787618390] [2021-12-07 00:57:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:05,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:05,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:05,403 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:05,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-07 00:57:05,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:05,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:57:05,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:05,502 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-07 00:57:05,502 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:05,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787618390] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:05,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:57:05,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-07 00:57:05,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226855910] [2021-12-07 00:57:05,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:05,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:57:05,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:57:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:57:05,503 INFO L87 Difference]: Start difference. First operand 103 states and 137 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2021-12-07 00:57:05,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:05,601 INFO L93 Difference]: Finished difference Result 244 states and 353 transitions. [2021-12-07 00:57:05,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:57:05,602 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) Word has length 32 [2021-12-07 00:57:05,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:05,603 INFO L225 Difference]: With dead ends: 244 [2021-12-07 00:57:05,603 INFO L226 Difference]: Without dead ends: 161 [2021-12-07 00:57:05,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:57:05,605 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 37 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 158 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 158 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:05,605 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 89 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 158 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:05,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-12-07 00:57:05,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 132. [2021-12-07 00:57:05,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.297709923664122) internal successors, (170), 131 states have internal predecessors, (170), 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) [2021-12-07 00:57:05,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 170 transitions. [2021-12-07 00:57:05,615 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 170 transitions. Word has length 32 [2021-12-07 00:57:05,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:05,615 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 170 transitions. [2021-12-07 00:57:05,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 4 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) [2021-12-07 00:57:05,616 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 170 transitions. [2021-12-07 00:57:05,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:57:05,617 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:05,617 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1] [2021-12-07 00:57:05,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:05,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:05,819 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:05,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:05,820 INFO L85 PathProgramCache]: Analyzing trace with hash 745678486, now seen corresponding path program 1 times [2021-12-07 00:57:05,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:05,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528029994] [2021-12-07 00:57:05,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:05,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:05,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-07 00:57:06,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:06,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528029994] [2021-12-07 00:57:06,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528029994] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:06,019 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027214429] [2021-12-07 00:57:06,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:06,020 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:06,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:06,020 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:06,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-07 00:57:06,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:57:06,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:06,128 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-07 00:57:06,129 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:06,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027214429] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:06,129 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:57:06,129 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-12-07 00:57:06,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795839015] [2021-12-07 00:57:06,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:06,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:57:06,130 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:06,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:57:06,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:57:06,130 INFO L87 Difference]: Start difference. First operand 132 states and 170 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-12-07 00:57:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:06,259 INFO L93 Difference]: Finished difference Result 303 states and 418 transitions. [2021-12-07 00:57:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:57:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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 38 [2021-12-07 00:57:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:06,260 INFO L225 Difference]: With dead ends: 303 [2021-12-07 00:57:06,260 INFO L226 Difference]: Without dead ends: 191 [2021-12-07 00:57:06,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:57:06,262 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 36 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:06,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 93 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-12-07 00:57:06,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 161. [2021-12-07 00:57:06,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.26875) internal successors, (203), 160 states have internal predecessors, (203), 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) [2021-12-07 00:57:06,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 203 transitions. [2021-12-07 00:57:06,270 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 203 transitions. Word has length 38 [2021-12-07 00:57:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:06,271 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 203 transitions. [2021-12-07 00:57:06,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 4 states have internal predecessors, (36), 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) [2021-12-07 00:57:06,271 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 203 transitions. [2021-12-07 00:57:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-07 00:57:06,272 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:06,272 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 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, 1, 1] [2021-12-07 00:57:06,291 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-07 00:57:06,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-07 00:57:06,474 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:06,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:06,476 INFO L85 PathProgramCache]: Analyzing trace with hash -1650574969, now seen corresponding path program 1 times [2021-12-07 00:57:06,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:06,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174950852] [2021-12-07 00:57:06,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:06,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:06,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,679 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-07 00:57:06,679 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:06,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174950852] [2021-12-07 00:57:06,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174950852] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:06,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226839818] [2021-12-07 00:57:06,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:06,680 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:06,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:06,681 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:06,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-07 00:57:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:06,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:57:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-07 00:57:06,903 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:06,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226839818] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:06,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-07 00:57:06,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2021-12-07 00:57:06,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253196136] [2021-12-07 00:57:06,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:06,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:57:06,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:57:06,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:06,905 INFO L87 Difference]: Start difference. First operand 161 states and 203 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2021-12-07 00:57:06,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:06,981 INFO L93 Difference]: Finished difference Result 315 states and 407 transitions. [2021-12-07 00:57:06,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:57:06,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) Word has length 44 [2021-12-07 00:57:06,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:06,983 INFO L225 Difference]: With dead ends: 315 [2021-12-07 00:57:06,983 INFO L226 Difference]: Without dead ends: 150 [2021-12-07 00:57:06,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:57:06,984 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 70 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:06,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:06,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-07 00:57:06,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 123. [2021-12-07 00:57:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 122 states have internal predecessors, (154), 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) [2021-12-07 00:57:06,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2021-12-07 00:57:06,991 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 44 [2021-12-07 00:57:06,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:06,991 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2021-12-07 00:57:06,991 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2021-12-07 00:57:06,992 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2021-12-07 00:57:06,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-07 00:57:06,993 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:06,994 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:07,026 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-07 00:57:07,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:07,194 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:07,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:07,195 INFO L85 PathProgramCache]: Analyzing trace with hash -564670639, now seen corresponding path program 1 times [2021-12-07 00:57:07,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:07,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888575352] [2021-12-07 00:57:07,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:07,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:07,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,292 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-07 00:57:07,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:07,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888575352] [2021-12-07 00:57:07,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888575352] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:07,293 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:07,293 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:57:07,293 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898040182] [2021-12-07 00:57:07,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:07,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:57:07,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:07,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:57:07,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:07,294 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2021-12-07 00:57:07,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:07,497 INFO L93 Difference]: Finished difference Result 479 states and 594 transitions. [2021-12-07 00:57:07,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:57:07,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) Word has length 65 [2021-12-07 00:57:07,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:07,499 INFO L225 Difference]: With dead ends: 479 [2021-12-07 00:57:07,499 INFO L226 Difference]: Without dead ends: 372 [2021-12-07 00:57:07,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:07,500 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 147 mSDsluCounter, 138 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:07,500 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 222 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:57:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2021-12-07 00:57:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 123. [2021-12-07 00:57:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.2622950819672132) internal successors, (154), 122 states have internal predecessors, (154), 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) [2021-12-07 00:57:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 154 transitions. [2021-12-07 00:57:07,505 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 154 transitions. Word has length 65 [2021-12-07 00:57:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:07,505 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 154 transitions. [2021-12-07 00:57:07,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.4) internal successors, (37), 5 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) [2021-12-07 00:57:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 154 transitions. [2021-12-07 00:57:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 00:57:07,506 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:07,506 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:07,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-07 00:57:07,506 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:07,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:07,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1543642426, now seen corresponding path program 1 times [2021-12-07 00:57:07,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:07,507 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824607845] [2021-12-07 00:57:07,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:07,507 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-12-07 00:57:07,559 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:07,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824607845] [2021-12-07 00:57:07,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824607845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:07,559 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:07,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:57:07,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849581683] [2021-12-07 00:57:07,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:07,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:57:07,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:07,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:57:07,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:07,560 INFO L87 Difference]: Start difference. First operand 123 states and 154 transitions. Second operand has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:07,624 INFO L93 Difference]: Finished difference Result 384 states and 474 transitions. [2021-12-07 00:57:07,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:57:07,625 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-12-07 00:57:07,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:07,626 INFO L225 Difference]: With dead ends: 384 [2021-12-07 00:57:07,626 INFO L226 Difference]: Without dead ends: 277 [2021-12-07 00:57:07,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:07,627 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 114 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 85 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:07,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 138 Invalid, 85 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:57:07,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-12-07 00:57:07,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 185. [2021-12-07 00:57:07,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.266304347826087) internal successors, (233), 184 states have internal predecessors, (233), 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) [2021-12-07 00:57:07,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 233 transitions. [2021-12-07 00:57:07,633 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 233 transitions. Word has length 66 [2021-12-07 00:57:07,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:07,633 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 233 transitions. [2021-12-07 00:57:07,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 8.6) internal successors, (43), 5 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:07,633 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 233 transitions. [2021-12-07 00:57:07,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-12-07 00:57:07,634 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:07,634 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:07,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-07 00:57:07,634 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:07,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:07,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1373754372, now seen corresponding path program 1 times [2021-12-07 00:57:07,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:07,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686489482] [2021-12-07 00:57:07,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:07,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2021-12-07 00:57:07,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:07,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686489482] [2021-12-07 00:57:07,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686489482] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:07,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:07,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:57:07,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096258065] [2021-12-07 00:57:07,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:07,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:57:07,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:07,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:57:07,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:07,716 INFO L87 Difference]: Start difference. First operand 185 states and 233 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-12-07 00:57:08,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:08,071 INFO L93 Difference]: Finished difference Result 942 states and 1171 transitions. [2021-12-07 00:57:08,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:08,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) Word has length 66 [2021-12-07 00:57:08,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:08,076 INFO L225 Difference]: With dead ends: 942 [2021-12-07 00:57:08,076 INFO L226 Difference]: Without dead ends: 773 [2021-12-07 00:57:08,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:57:08,077 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 297 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 422 SdHoareTripleChecker+Invalid, 442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:08,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 422 Invalid, 442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:57:08,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2021-12-07 00:57:08,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 178. [2021-12-07 00:57:08,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.271186440677966) internal successors, (225), 177 states have internal predecessors, (225), 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) [2021-12-07 00:57:08,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 225 transitions. [2021-12-07 00:57:08,095 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 225 transitions. Word has length 66 [2021-12-07 00:57:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:08,095 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 225 transitions. [2021-12-07 00:57:08,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 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) [2021-12-07 00:57:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 225 transitions. [2021-12-07 00:57:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-07 00:57:08,096 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:08,097 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:08,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-07 00:57:08,097 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:08,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:08,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1708732925, now seen corresponding path program 1 times [2021-12-07 00:57:08,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:08,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305114148] [2021-12-07 00:57:08,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:08,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 47 proven. 3 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-07 00:57:08,185 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:08,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305114148] [2021-12-07 00:57:08,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305114148] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:08,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279228316] [2021-12-07 00:57:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:08,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:08,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:08,186 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:08,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-07 00:57:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:08,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:57:08,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:08,440 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 46 proven. 3 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-12-07 00:57:08,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:08,572 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 48 proven. 3 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-12-07 00:57:08,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279228316] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:08,573 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:08,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 6] total 12 [2021-12-07 00:57:08,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473661134] [2021-12-07 00:57:08,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:08,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:57:08,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:08,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:57:08,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:57:08,574 INFO L87 Difference]: Start difference. First operand 178 states and 225 transitions. Second operand has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 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) [2021-12-07 00:57:08,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:08,855 INFO L93 Difference]: Finished difference Result 848 states and 1116 transitions. [2021-12-07 00:57:08,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-07 00:57:08,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 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 68 [2021-12-07 00:57:08,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:08,859 INFO L225 Difference]: With dead ends: 848 [2021-12-07 00:57:08,859 INFO L226 Difference]: Without dead ends: 651 [2021-12-07 00:57:08,860 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:57:08,860 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 273 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:08,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 189 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:57:08,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2021-12-07 00:57:08,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 552. [2021-12-07 00:57:08,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 551 states have (on average 1.2885662431941924) internal successors, (710), 551 states have internal predecessors, (710), 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) [2021-12-07 00:57:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 710 transitions. [2021-12-07 00:57:08,892 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 710 transitions. Word has length 68 [2021-12-07 00:57:08,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:08,892 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 710 transitions. [2021-12-07 00:57:08,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.833333333333334) internal successors, (106), 12 states have internal predecessors, (106), 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) [2021-12-07 00:57:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 710 transitions. [2021-12-07 00:57:08,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:57:08,893 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:08,894 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:08,926 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-07 00:57:09,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-12-07 00:57:09,094 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:09,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:09,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1373021230, now seen corresponding path program 1 times [2021-12-07 00:57:09,095 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:09,095 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731572851] [2021-12-07 00:57:09,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:09,095 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:09,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:09,218 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:57:09,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-07 00:57:09,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731572851] [2021-12-07 00:57:09,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731572851] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-07 00:57:09,218 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367890529] [2021-12-07 00:57:09,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:09,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-07 00:57:09,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:09,219 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-07 00:57:09,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-07 00:57:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:09,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-07 00:57:09,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:57:09,551 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:09,695 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 58 proven. 16 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-07 00:57:09,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [367890529] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:09,695 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-07 00:57:09,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 8] total 13 [2021-12-07 00:57:09,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304712951] [2021-12-07 00:57:09,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:09,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-07 00:57:09,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-07 00:57:09,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-07 00:57:09,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-12-07 00:57:09,697 INFO L87 Difference]: Start difference. First operand 552 states and 710 transitions. Second operand has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 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) [2021-12-07 00:57:09,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:09,989 INFO L93 Difference]: Finished difference Result 1342 states and 1665 transitions. [2021-12-07 00:57:09,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:09,990 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 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 70 [2021-12-07 00:57:09,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:09,994 INFO L225 Difference]: With dead ends: 1342 [2021-12-07 00:57:09,994 INFO L226 Difference]: Without dead ends: 813 [2021-12-07 00:57:09,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:57:09,995 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 287 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 235 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:09,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 417 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 235 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-07 00:57:09,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2021-12-07 00:57:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 497. [2021-12-07 00:57:10,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.2661290322580645) internal successors, (628), 496 states have internal predecessors, (628), 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) [2021-12-07 00:57:10,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 628 transitions. [2021-12-07 00:57:10,014 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 628 transitions. Word has length 70 [2021-12-07 00:57:10,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:10,014 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 628 transitions. [2021-12-07 00:57:10,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 8.153846153846153) internal successors, (106), 13 states have internal predecessors, (106), 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) [2021-12-07 00:57:10,014 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 628 transitions. [2021-12-07 00:57:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:57:10,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:10,015 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:10,018 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-07 00:57:10,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-12-07 00:57:10,216 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:10,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:10,216 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 2 times [2021-12-07 00:57:10,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-07 00:57:10,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995059048] [2021-12-07 00:57:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:10,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-07 00:57:10,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 00:57:10,260 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-07 00:57:10,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-07 00:57:10,321 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-07 00:57:10,321 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-07 00:57:10,322 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-07 00:57:10,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-07 00:57:10,327 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:10,330 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-07 00:57:10,398 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.12 12:57:10 BoogieIcfgContainer [2021-12-07 00:57:10,398 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-07 00:57:10,398 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-07 00:57:10,399 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-07 00:57:10,399 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-07 00:57:10,399 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:57:03" (3/4) ... [2021-12-07 00:57:10,402 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-07 00:57:10,402 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-07 00:57:10,403 INFO L158 Benchmark]: Toolchain (without parser) took 7438.40ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 89.4MB in the beginning and 75.9MB in the end (delta: 13.5MB). Peak memory consumption was 42.2MB. Max. memory is 16.1GB. [2021-12-07 00:57:10,403 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:57:10,403 INFO L158 Benchmark]: CACSL2BoogieTranslator took 195.34ms. Allocated memory is still 127.9MB. Free memory was 89.1MB in the beginning and 77.7MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-07 00:57:10,403 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.25ms. Allocated memory is still 127.9MB. Free memory was 77.6MB in the beginning and 75.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-07 00:57:10,404 INFO L158 Benchmark]: Boogie Preprocessor took 21.00ms. Allocated memory is still 127.9MB. Free memory was 75.8MB in the beginning and 74.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:57:10,404 INFO L158 Benchmark]: RCFGBuilder took 301.86ms. Allocated memory is still 127.9MB. Free memory was 74.4MB in the beginning and 99.1MB in the end (delta: -24.7MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2021-12-07 00:57:10,404 INFO L158 Benchmark]: TraceAbstraction took 6881.59ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 98.5MB in the beginning and 75.9MB in the end (delta: 22.7MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. [2021-12-07 00:57:10,405 INFO L158 Benchmark]: Witness Printer took 3.55ms. Allocated memory is still 155.2MB. Free memory is still 75.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-07 00:57:10,406 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 127.9MB. Free memory is still 105.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 195.34ms. Allocated memory is still 127.9MB. Free memory was 89.1MB in the beginning and 77.7MB in the end (delta: 11.4MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.25ms. Allocated memory is still 127.9MB. Free memory was 77.6MB in the beginning and 75.8MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 21.00ms. Allocated memory is still 127.9MB. Free memory was 75.8MB in the beginning and 74.5MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 301.86ms. Allocated memory is still 127.9MB. Free memory was 74.4MB in the beginning and 99.1MB in the end (delta: -24.7MB). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * TraceAbstraction took 6881.59ms. Allocated memory was 127.9MB in the beginning and 155.2MB in the end (delta: 27.3MB). Free memory was 98.5MB in the beginning and 75.9MB in the end (delta: 22.7MB). Peak memory consumption was 51.1MB. Max. memory is 16.1GB. * Witness Printer took 3.55ms. Allocated memory is still 155.2MB. Free memory is still 75.9MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 25]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of bitwiseOr at line 116, overapproximation of bitwiseAnd at line 96. Possible FailurePath: [L124] unsigned int a, b, r; [L125] a = __VERIFIER_nondet_uint() [L127] b = 234770789 [L129] CALL, EXPR mp_add(a, b) [L42] unsigned char a0, a1, a2, a3; [L43] unsigned char b0, b1, b2, b3; [L44] unsigned char r0, r1, r2, r3; [L45] unsigned short carry; [L46] unsigned short partial_sum; [L47] unsigned int r; [L48] unsigned char i; [L49] unsigned char na, nb; [L50] a0 = a [L51] a1 = a >> 8 [L52] a2 = a >> 16U [L53] a3 = a >> 24U [L54] b0 = b [L55] b1 = b >> 8U [L56] b2 = b >> 16U [L57] b3 = b >> 24U [L58] na = (unsigned char)4 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=4] [L59] COND TRUE a3 == (unsigned char)0 [L60] na = na - 1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=3] [L61] COND TRUE a2 == (unsigned char)0 [L62] na = na - 1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=2] [L63] COND TRUE a1 == (unsigned char)0 [L64] na = na - 1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=1] [L68] nb = (unsigned char)4 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=1, nb=4] [L69] COND FALSE !(b3 == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, na=1, nb=4] [L78] carry = (unsigned short)0 [L79] i = (unsigned char)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=0] [L83] COND TRUE i < na VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=0] [L84] COND TRUE i == (unsigned char)0 [L84] partial_sum = partial_sum + a0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L85] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L86] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L87] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L89] COND TRUE i < nb VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=255] [L90] COND TRUE i == (unsigned char)0 [L90] partial_sum = partial_sum + b0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=356] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=356] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=356] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=0, na=1, nb=4, partial_sum=356] [L95] COND TRUE partial_sum > ((unsigned char)255) [L96] partial_sum = partial_sum & ((unsigned char)255) [L97] carry = (unsigned short)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4] [L99] COND TRUE i == (unsigned char)0 [L99] r0 = (unsigned char)partial_sum VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4, partial_sum=20838, r0=234770790] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4, partial_sum=20838, r0=234770790] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4, partial_sum=20838, r0=234770790] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=0, na=1, nb=4, partial_sum=20838, r0=234770790] [L104] i = i + (unsigned char)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=1, i=1, na=1, nb=4, partial_sum=20838, r0=234770790] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=1, r0=234770790] [L83] COND FALSE !(i < na) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=1, r0=234770790] [L89] COND TRUE i < nb VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=1, r0=234770790] [L90] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=1, r0=234770790] [L91] COND TRUE i == (unsigned char)1 [L91] partial_sum = partial_sum + b1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790] [L100] COND TRUE i == (unsigned char)1 [L100] r1 = (unsigned char)partial_sum VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790, r1=82] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790, r1=82] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=1, na=1, nb=4, partial_sum=82, r0=234770790, r1=82] [L104] i = i + (unsigned char)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=82, r0=234770790, r1=82] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L83] COND FALSE !(i < na) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L89] COND TRUE i < nb VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L90] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=0, r0=234770790, r1=82] [L92] COND TRUE i == (unsigned char)2 [L92] partial_sum = partial_sum + b2 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L93] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82] [L101] COND TRUE i == (unsigned char)2 [L101] r2 = (unsigned char)partial_sum VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82, r2=254] [L102] COND FALSE !(i == (unsigned char)3) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=2, na=1, nb=4, partial_sum=254, r0=234770790, r1=82, r2=254] [L104] i = i + (unsigned char)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=254, r0=234770790, r1=82, r2=254] [L80] COND TRUE (i < na) || (i < nb) || (carry != (unsigned short)0) [L81] partial_sum = carry [L82] carry = (unsigned short)0 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L83] COND FALSE !(i < na) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L89] COND TRUE i < nb VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L90] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L91] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L92] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=0, r0=234770790, r1=82, r2=254] [L93] COND TRUE i == (unsigned char)3 [L93] partial_sum = partial_sum + b3 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L95] COND FALSE !(partial_sum > ((unsigned char)255)) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L99] COND FALSE !(i == (unsigned char)0) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L100] COND FALSE !(i == (unsigned char)1) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L101] COND FALSE !(i == (unsigned char)2) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254] [L102] COND TRUE i == (unsigned char)3 [L102] r3 = (unsigned char)partial_sum VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=3, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L104] i = i + (unsigned char)1 VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=4, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L80] COND FALSE !((i < na) || (i < nb) || (carry != (unsigned short)0)) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=4, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L107] COND FALSE !(i < (unsigned char)4) VAL [\old(a)=255, \old(b)=234770789, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=4, na=1, nb=4, partial_sum=13, r0=234770790, r1=82, r2=254, r3=13] [L116] r = r0 | (r1 << 8U) | (r2 << 16U) | ((unsigned int)r3 << 24U) [L118] return r; VAL [\old(a)=255, \old(b)=234770789, \result=3, a=255, a0=-4294967041, a1=-16777216, a2=-65536, a3=-256, b=234770789, b0=234770789, b1=917073, b2=3582, b3=13, carry=0, i=4, na=1, nb=4, partial_sum=13, r=3, r0=234770790, r1=82, r2=254, r3=13] [L129] RET, EXPR mp_add(a, b) [L129] r = mp_add(a, b) [L131] CALL __VERIFIER_assert(r == a + b) [L24] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L25] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 42 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 6.8s, OverallIterations: 16, TraceHistogramMax: 4, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1548 SdHoareTripleChecker+Valid, 1.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1548 mSDsluCounter, 2281 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1376 mSDsCounter, 254 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2159 IncrementalHoareTripleChecker+Invalid, 2413 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 254 mSolverCounterUnsat, 905 mSDtfsCounter, 2159 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 520 GetRequests, 428 SyntacticMatches, 10 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=552occurred in iteration=14, InterpolantAutomatonStates: 80, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 15 MinimizatonAttempts, 1547 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 934 NumberOfCodeBlocks, 934 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 979 ConstructedInterpolants, 0 QuantifiedInterpolants, 3806 SizeOfPredicates, 15 NumberOfNonLiveVariables, 839 ConjunctsInSsa, 48 ConjunctsInUnsatCore, 23 InterpolantComputations, 13 PerfectInterpolantSequences, 775/810 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-07 00:57:10,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector/byte_add_2-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa --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 de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-07 00:57:12,080 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-07 00:57:12,082 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-07 00:57:12,112 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-07 00:57:12,113 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-07 00:57:12,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-07 00:57:12,116 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-07 00:57:12,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-07 00:57:12,121 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-07 00:57:12,122 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-07 00:57:12,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-07 00:57:12,125 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-07 00:57:12,126 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-07 00:57:12,127 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-07 00:57:12,128 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-07 00:57:12,130 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-07 00:57:12,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-07 00:57:12,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-07 00:57:12,134 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-07 00:57:12,137 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-07 00:57:12,139 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-07 00:57:12,140 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-07 00:57:12,141 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-07 00:57:12,142 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-07 00:57:12,146 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-07 00:57:12,146 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-07 00:57:12,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-07 00:57:12,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-07 00:57:12,148 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-07 00:57:12,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-07 00:57:12,150 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-07 00:57:12,151 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-07 00:57:12,151 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-07 00:57:12,152 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-07 00:57:12,153 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-07 00:57:12,153 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-07 00:57:12,154 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-07 00:57:12,154 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-07 00:57:12,154 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-07 00:57:12,155 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-07 00:57:12,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-07 00:57:12,156 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-07 00:57:12,180 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-07 00:57:12,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-07 00:57:12,180 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-07 00:57:12,181 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-07 00:57:12,181 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-07 00:57:12,181 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-07 00:57:12,182 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-07 00:57:12,182 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-07 00:57:12,182 INFO L138 SettingsManager]: * Use SBE=true [2021-12-07 00:57:12,183 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-07 00:57:12,183 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-07 00:57:12,183 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-07 00:57:12,183 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-07 00:57:12,183 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-07 00:57:12,184 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-07 00:57:12,184 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-07 00:57:12,184 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-07 00:57:12,184 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-07 00:57:12,184 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-07 00:57:12,184 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-07 00:57:12,184 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-07 00:57:12,185 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-07 00:57:12,185 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-07 00:57:12,185 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-07 00:57:12,185 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-07 00:57:12,185 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-07 00:57:12,185 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:57:12,185 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-07 00:57:12,186 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-07 00:57:12,186 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-07 00:57:12,186 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-07 00:57:12,186 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-07 00:57:12,186 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-07 00:57:12,186 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-07 00:57:12,186 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-07 00:57:12,187 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-07 00:57:12,187 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-07 00:57:12,187 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de6decccd91c37b79cf607a5f07869bb0707e08de203e3ce6759a25f4e6e01ba [2021-12-07 00:57:12,425 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-07 00:57:12,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-07 00:57:12,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-07 00:57:12,443 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-07 00:57:12,444 INFO L275 PluginConnector]: CDTParser initialized [2021-12-07 00:57:12,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-12-07 00:57:12,485 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data/82717eb56/603ec55d1ab240318d7e298ca725f1e6/FLAG558af4cfd [2021-12-07 00:57:12,883 INFO L306 CDTParser]: Found 1 translation units. [2021-12-07 00:57:12,884 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/sv-benchmarks/c/bitvector/byte_add_2-2.i [2021-12-07 00:57:12,890 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data/82717eb56/603ec55d1ab240318d7e298ca725f1e6/FLAG558af4cfd [2021-12-07 00:57:12,900 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/data/82717eb56/603ec55d1ab240318d7e298ca725f1e6 [2021-12-07 00:57:12,902 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-07 00:57:12,903 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-07 00:57:12,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-07 00:57:12,905 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-07 00:57:12,907 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-07 00:57:12,908 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:57:12" (1/1) ... [2021-12-07 00:57:12,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79020b60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:12, skipping insertion in model container [2021-12-07 00:57:12,909 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.12 12:57:12" (1/1) ... [2021-12-07 00:57:12,918 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-07 00:57:12,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-07 00:57:13,034 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_030f898e-3cd5-4dcb-a868-51a867249742/sv-benchmarks/c/bitvector/byte_add_2-2.i[1168,1181] [2021-12-07 00:57:13,065 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:57:13,076 INFO L203 MainTranslator]: Completed pre-run [2021-12-07 00:57:13,085 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_030f898e-3cd5-4dcb-a868-51a867249742/sv-benchmarks/c/bitvector/byte_add_2-2.i[1168,1181] [2021-12-07 00:57:13,102 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-07 00:57:13,112 INFO L208 MainTranslator]: Completed translation [2021-12-07 00:57:13,112 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13 WrapperNode [2021-12-07 00:57:13,112 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-07 00:57:13,113 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-07 00:57:13,113 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-07 00:57:13,113 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-07 00:57:13,118 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,125 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,142 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 123 [2021-12-07 00:57:13,143 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-07 00:57:13,143 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-07 00:57:13,143 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-07 00:57:13,144 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-07 00:57:13,149 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,152 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,152 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,157 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,161 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,162 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,164 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-07 00:57:13,165 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-07 00:57:13,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-07 00:57:13,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-07 00:57:13,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (1/1) ... [2021-12-07 00:57:13,171 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-07 00:57:13,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 [2021-12-07 00:57:13,189 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-07 00:57:13,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-07 00:57:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-07 00:57:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-07 00:57:13,226 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-07 00:57:13,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-07 00:57:13,285 INFO L236 CfgBuilder]: Building ICFG [2021-12-07 00:57:13,287 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-07 00:57:13,474 INFO L277 CfgBuilder]: Performing block encoding [2021-12-07 00:57:13,480 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-07 00:57:13,480 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-07 00:57:13,482 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:57:13 BoogieIcfgContainer [2021-12-07 00:57:13,482 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-07 00:57:13,484 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-07 00:57:13,484 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-07 00:57:13,487 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-07 00:57:13,487 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.12 12:57:12" (1/3) ... [2021-12-07 00:57:13,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6f5530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:57:13, skipping insertion in model container [2021-12-07 00:57:13,488 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.12 12:57:13" (2/3) ... [2021-12-07 00:57:13,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e6f5530 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.12 12:57:13, skipping insertion in model container [2021-12-07 00:57:13,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.12 12:57:13" (3/3) ... [2021-12-07 00:57:13,490 INFO L111 eAbstractionObserver]: Analyzing ICFG byte_add_2-2.i [2021-12-07 00:57:13,495 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-07 00:57:13,496 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-07 00:57:13,535 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-07 00:57:13,542 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 [2021-12-07 00:57:13,542 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-07 00:57:13,553 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:13,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:57:13,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:13,559 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:13,559 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:13,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:13,565 INFO L85 PathProgramCache]: Analyzing trace with hash 255061167, now seen corresponding path program 1 times [2021-12-07 00:57:13,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:13,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1489791689] [2021-12-07 00:57:13,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:13,578 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:13,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:13,580 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:13,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-07 00:57:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:13,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-07 00:57:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:13,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:13,668 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:13,669 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:13,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1489791689] [2021-12-07 00:57:13,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1489791689] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:13,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:13,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-07 00:57:13,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415914840] [2021-12-07 00:57:13,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:13,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-07 00:57:13,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:13,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-07 00:57:13,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:57:13,708 INFO L87 Difference]: Start difference. First operand has 42 states, 40 states have (on average 1.775) internal successors, (71), 41 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:13,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:13,725 INFO L93 Difference]: Finished difference Result 57 states and 92 transitions. [2021-12-07 00:57:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-07 00:57:13,727 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-07 00:57:13,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:13,735 INFO L225 Difference]: With dead ends: 57 [2021-12-07 00:57:13,735 INFO L226 Difference]: Without dead ends: 38 [2021-12-07 00:57:13,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-07 00:57:13,742 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:13,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:57:13,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-07 00:57:13,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-12-07 00:57:13,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 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) [2021-12-07 00:57:13,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 64 transitions. [2021-12-07 00:57:13,777 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 64 transitions. Word has length 12 [2021-12-07 00:57:13,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:13,778 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 64 transitions. [2021-12-07 00:57:13,778 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:13,778 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 64 transitions. [2021-12-07 00:57:13,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-07 00:57:13,779 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:13,779 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:13,790 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:13,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:13,980 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:13,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:13,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1803477009, now seen corresponding path program 1 times [2021-12-07 00:57:13,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:13,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1421028699] [2021-12-07 00:57:13,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:13,982 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:13,982 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:13,983 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:13,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-07 00:57:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:14,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 42 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:57:14,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:14,061 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:14,061 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:14,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1421028699] [2021-12-07 00:57:14,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1421028699] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:14,062 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:14,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:57:14,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800063218] [2021-12-07 00:57:14,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:14,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:57:14,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:14,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:57:14,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:57:14,064 INFO L87 Difference]: Start difference. First operand 38 states and 64 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:14,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:14,198 INFO L93 Difference]: Finished difference Result 116 states and 201 transitions. [2021-12-07 00:57:14,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:57:14,199 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-07 00:57:14,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:14,200 INFO L225 Difference]: With dead ends: 116 [2021-12-07 00:57:14,200 INFO L226 Difference]: Without dead ends: 88 [2021-12-07 00:57:14,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:57:14,202 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 66 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:14,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 152 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:14,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-07 00:57:14,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 81. [2021-12-07 00:57:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.625) internal successors, (130), 80 states have internal predecessors, (130), 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) [2021-12-07 00:57:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 130 transitions. [2021-12-07 00:57:14,212 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 130 transitions. Word has length 12 [2021-12-07 00:57:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:14,212 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 130 transitions. [2021-12-07 00:57:14,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 130 transitions. [2021-12-07 00:57:14,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-07 00:57:14,213 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:14,214 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:14,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-12-07 00:57:14,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:14,416 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:14,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:14,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1087802014, now seen corresponding path program 1 times [2021-12-07 00:57:14,420 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:14,420 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [813723692] [2021-12-07 00:57:14,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:14,421 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:14,422 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:14,424 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:14,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-07 00:57:14,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:14,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:57:14,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:14,542 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:14,542 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:14,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [813723692] [2021-12-07 00:57:14,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [813723692] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:14,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:14,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-07 00:57:14,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284645585] [2021-12-07 00:57:14,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:14,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-07 00:57:14,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:14,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-07 00:57:14,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:14,548 INFO L87 Difference]: Start difference. First operand 81 states and 130 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:14,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:14,556 INFO L93 Difference]: Finished difference Result 86 states and 134 transitions. [2021-12-07 00:57:14,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-07 00:57:14,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-07 00:57:14,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:14,558 INFO L225 Difference]: With dead ends: 86 [2021-12-07 00:57:14,558 INFO L226 Difference]: Without dead ends: 55 [2021-12-07 00:57:14,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-07 00:57:14,560 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 55 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:14,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 58 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-07 00:57:14,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-07 00:57:14,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-12-07 00:57:14,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 54 states have internal predecessors, (80), 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) [2021-12-07 00:57:14,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 80 transitions. [2021-12-07 00:57:14,569 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 80 transitions. Word has length 13 [2021-12-07 00:57:14,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:14,569 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 80 transitions. [2021-12-07 00:57:14,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:14,570 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 80 transitions. [2021-12-07 00:57:14,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-07 00:57:14,571 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:14,571 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] [2021-12-07 00:57:14,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-12-07 00:57:14,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:14,773 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:14,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1480128500, now seen corresponding path program 1 times [2021-12-07 00:57:14,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:14,779 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1545800434] [2021-12-07 00:57:14,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:14,781 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:14,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:14,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:14,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-07 00:57:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:14,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-07 00:57:14,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:14,908 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:14,908 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:14,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1545800434] [2021-12-07 00:57:14,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1545800434] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:14,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:14,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-07 00:57:14,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950426376] [2021-12-07 00:57:14,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:14,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-07 00:57:14,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:14,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-07 00:57:14,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:57:14,911 INFO L87 Difference]: Start difference. First operand 55 states and 80 transitions. Second operand has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-12-07 00:57:15,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:15,015 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2021-12-07 00:57:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-07 00:57:15,016 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 [2021-12-07 00:57:15,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:15,017 INFO L225 Difference]: With dead ends: 151 [2021-12-07 00:57:15,017 INFO L226 Difference]: Without dead ends: 107 [2021-12-07 00:57:15,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-12-07 00:57:15,019 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 65 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:15,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 146 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:15,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-12-07 00:57:15,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 60. [2021-12-07 00:57:15,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 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) [2021-12-07 00:57:15,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2021-12-07 00:57:15,028 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 25 [2021-12-07 00:57:15,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:15,029 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2021-12-07 00:57:15,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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) [2021-12-07 00:57:15,029 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2021-12-07 00:57:15,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-07 00:57:15,030 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:15,030 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] [2021-12-07 00:57:15,037 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-12-07 00:57:15,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:15,232 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:15,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1384042382, now seen corresponding path program 1 times [2021-12-07 00:57:15,236 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:15,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2139394392] [2021-12-07 00:57:15,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:15,238 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:15,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:15,241 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:15,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-07 00:57:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:15,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:57:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:15,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:15,366 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:15,367 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:15,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2139394392] [2021-12-07 00:57:15,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2139394392] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:15,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:15,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:57:15,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804190386] [2021-12-07 00:57:15,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:15,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:57:15,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:15,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:57:15,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:15,368 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-12-07 00:57:15,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:15,436 INFO L93 Difference]: Finished difference Result 201 states and 290 transitions. [2021-12-07 00:57:15,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:57:15,436 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-12-07 00:57:15,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:15,438 INFO L225 Difference]: With dead ends: 201 [2021-12-07 00:57:15,438 INFO L226 Difference]: Without dead ends: 157 [2021-12-07 00:57:15,438 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:15,439 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 140 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:15,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 295 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:15,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-12-07 00:57:15,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 60. [2021-12-07 00:57:15,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 59 states have internal predecessors, (85), 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) [2021-12-07 00:57:15,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 85 transitions. [2021-12-07 00:57:15,447 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 85 transitions. Word has length 26 [2021-12-07 00:57:15,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:15,447 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 85 transitions. [2021-12-07 00:57:15,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 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) [2021-12-07 00:57:15,448 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 85 transitions. [2021-12-07 00:57:15,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-12-07 00:57:15,449 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:15,449 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] [2021-12-07 00:57:15,455 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (6)] Ended with exit code 0 [2021-12-07 00:57:15,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:15,650 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:15,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:15,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1985045161, now seen corresponding path program 1 times [2021-12-07 00:57:15,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:15,653 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [118647783] [2021-12-07 00:57:15,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:15,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:15,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:15,656 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:15,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-07 00:57:15,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:15,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:57:15,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:15,811 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:15,811 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:15,811 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:15,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [118647783] [2021-12-07 00:57:15,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [118647783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:15,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:15,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:57:15,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804482952] [2021-12-07 00:57:15,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:15,812 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:57:15,812 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:15,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:57:15,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:15,813 INFO L87 Difference]: Start difference. First operand 60 states and 85 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:16,113 INFO L93 Difference]: Finished difference Result 269 states and 387 transitions. [2021-12-07 00:57:16,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:16,113 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-12-07 00:57:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:16,115 INFO L225 Difference]: With dead ends: 269 [2021-12-07 00:57:16,115 INFO L226 Difference]: Without dead ends: 221 [2021-12-07 00:57:16,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-07 00:57:16,116 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 357 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 357 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:16,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [357 Valid, 462 Invalid, 738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-07 00:57:16,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-12-07 00:57:16,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 57. [2021-12-07 00:57:16,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.4285714285714286) internal successors, (80), 56 states have internal predecessors, (80), 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) [2021-12-07 00:57:16,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 80 transitions. [2021-12-07 00:57:16,123 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 80 transitions. Word has length 27 [2021-12-07 00:57:16,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:16,123 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 80 transitions. [2021-12-07 00:57:16,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 7 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:16,124 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 80 transitions. [2021-12-07 00:57:16,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-07 00:57:16,124 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:16,124 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, 1, 1] [2021-12-07 00:57:16,135 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-12-07 00:57:16,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:16,326 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:16,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:16,328 INFO L85 PathProgramCache]: Analyzing trace with hash 221982208, now seen corresponding path program 1 times [2021-12-07 00:57:16,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:16,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1677437241] [2021-12-07 00:57:16,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:16,330 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:16,330 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:16,332 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:16,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-07 00:57:16,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:16,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:57:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:16,532 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:16,532 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:16,533 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1677437241] [2021-12-07 00:57:16,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1677437241] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:16,533 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:16,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:57:16,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421339694] [2021-12-07 00:57:16,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:16,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:57:16,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:16,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:57:16,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:16,535 INFO L87 Difference]: Start difference. First operand 57 states and 80 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-07 00:57:16,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:16,584 INFO L93 Difference]: Finished difference Result 76 states and 105 transitions. [2021-12-07 00:57:16,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:57:16,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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 29 [2021-12-07 00:57:16,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:16,585 INFO L225 Difference]: With dead ends: 76 [2021-12-07 00:57:16,586 INFO L226 Difference]: Without dead ends: 60 [2021-12-07 00:57:16,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:16,587 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 56 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:16,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 62 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 62 Invalid, 0 Unknown, 49 Unchecked, 0.0s Time] [2021-12-07 00:57:16,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-07 00:57:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-12-07 00:57:16,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.4137931034482758) internal successors, (82), 58 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) [2021-12-07 00:57:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 82 transitions. [2021-12-07 00:57:16,591 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 82 transitions. Word has length 29 [2021-12-07 00:57:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:16,592 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 82 transitions. [2021-12-07 00:57:16,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 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) [2021-12-07 00:57:16,592 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 82 transitions. [2021-12-07 00:57:16,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-07 00:57:16,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:16,593 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-12-07 00:57:16,603 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (8)] Ended with exit code 0 [2021-12-07 00:57:16,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:16,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:16,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:16,794 INFO L85 PathProgramCache]: Analyzing trace with hash -1944069515, now seen corresponding path program 1 times [2021-12-07 00:57:16,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:16,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1523909601] [2021-12-07 00:57:16,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:16,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:16,795 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:16,795 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:16,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-07 00:57:16,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:16,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:57:16,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:16,912 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:16,913 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:16,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1523909601] [2021-12-07 00:57:16,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1523909601] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:16,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:16,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-07 00:57:16,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619980813] [2021-12-07 00:57:16,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:16,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-07 00:57:16,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:16,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-07 00:57:16,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:16,914 INFO L87 Difference]: Start difference. First operand 59 states and 82 transitions. Second operand has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2021-12-07 00:57:16,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:16,967 INFO L93 Difference]: Finished difference Result 140 states and 187 transitions. [2021-12-07 00:57:16,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:57:16,968 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) Word has length 38 [2021-12-07 00:57:16,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:16,969 INFO L225 Difference]: With dead ends: 140 [2021-12-07 00:57:16,969 INFO L226 Difference]: Without dead ends: 82 [2021-12-07 00:57:16,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-07 00:57:16,970 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 30 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 85 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:16,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 118 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 70 Invalid, 0 Unknown, 85 Unchecked, 0.0s Time] [2021-12-07 00:57:16,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-07 00:57:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-12-07 00:57:16,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 81 states have internal predecessors, (106), 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) [2021-12-07 00:57:16,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-12-07 00:57:16,978 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 38 [2021-12-07 00:57:16,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:16,978 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-12-07 00:57:16,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.6) internal successors, (38), 5 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) [2021-12-07 00:57:16,979 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-12-07 00:57:16,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-07 00:57:16,980 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:16,980 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:16,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-07 00:57:17,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:17,183 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:17,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1155801417, now seen corresponding path program 1 times [2021-12-07 00:57:17,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:17,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1378809560] [2021-12-07 00:57:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:17,188 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:17,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:17,191 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:17,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-12-07 00:57:17,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:17,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:57:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:17,415 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:17,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:17,416 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:17,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1378809560] [2021-12-07 00:57:17,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1378809560] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:17,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:17,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-07 00:57:17,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408671450] [2021-12-07 00:57:17,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:17,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-07 00:57:17,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:17,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-07 00:57:17,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:57:17,418 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:17,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:17,457 INFO L93 Difference]: Finished difference Result 201 states and 268 transitions. [2021-12-07 00:57:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-07 00:57:17,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-07 00:57:17,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:17,459 INFO L225 Difference]: With dead ends: 201 [2021-12-07 00:57:17,459 INFO L226 Difference]: Without dead ends: 153 [2021-12-07 00:57:17,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-12-07 00:57:17,460 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 66 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 76 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:17,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 159 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 76 Unchecked, 0.0s Time] [2021-12-07 00:57:17,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-12-07 00:57:17,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 105. [2021-12-07 00:57:17,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.2596153846153846) internal successors, (131), 104 states have internal predecessors, (131), 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) [2021-12-07 00:57:17,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 131 transitions. [2021-12-07 00:57:17,470 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 131 transitions. Word has length 39 [2021-12-07 00:57:17,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:17,470 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 131 transitions. [2021-12-07 00:57:17,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.5) internal successors, (39), 6 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-07 00:57:17,470 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 131 transitions. [2021-12-07 00:57:17,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-07 00:57:17,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:17,472 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:17,482 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-12-07 00:57:17,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:17,674 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:17,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:17,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1672266272, now seen corresponding path program 1 times [2021-12-07 00:57:17,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:17,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [616831902] [2021-12-07 00:57:17,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:17,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:17,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:17,679 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:17,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-07 00:57:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:17,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:57:17,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:17,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:17,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:17,973 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:17,973 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [616831902] [2021-12-07 00:57:17,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [616831902] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:17,973 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:17,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-12-07 00:57:17,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672354860] [2021-12-07 00:57:17,974 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:17,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-07 00:57:17,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:17,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-07 00:57:17,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-12-07 00:57:17,975 INFO L87 Difference]: Start difference. First operand 105 states and 131 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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) [2021-12-07 00:57:18,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:18,151 INFO L93 Difference]: Finished difference Result 230 states and 327 transitions. [2021-12-07 00:57:18,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:57:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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 40 [2021-12-07 00:57:18,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:18,153 INFO L225 Difference]: With dead ends: 230 [2021-12-07 00:57:18,153 INFO L226 Difference]: Without dead ends: 165 [2021-12-07 00:57:18,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:57:18,154 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 278 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:18,154 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 67 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:18,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-12-07 00:57:18,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 140. [2021-12-07 00:57:18,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.3453237410071943) internal successors, (187), 139 states have internal predecessors, (187), 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) [2021-12-07 00:57:18,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 187 transitions. [2021-12-07 00:57:18,163 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 187 transitions. Word has length 40 [2021-12-07 00:57:18,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:18,163 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 187 transitions. [2021-12-07 00:57:18,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 8 states have internal predecessors, (63), 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) [2021-12-07 00:57:18,163 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 187 transitions. [2021-12-07 00:57:18,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:57:18,165 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:18,165 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:18,175 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:18,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:18,366 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:18,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:18,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1114855792, now seen corresponding path program 1 times [2021-12-07 00:57:18,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:18,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1877072419] [2021-12-07 00:57:18,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:18,367 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:18,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:18,368 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:18,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-12-07 00:57:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:18,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:57:18,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:18,517 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:57:18,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 49 proven. 8 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-07 00:57:18,617 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:18,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1877072419] [2021-12-07 00:57:18,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1877072419] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:18,618 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:18,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-07 00:57:18,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832081973] [2021-12-07 00:57:18,618 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:18,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:57:18,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:18,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:57:18,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:57:18,619 INFO L87 Difference]: Start difference. First operand 140 states and 187 transitions. Second operand has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 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) [2021-12-07 00:57:18,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:18,776 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2021-12-07 00:57:18,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:18,777 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 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 70 [2021-12-07 00:57:18,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:18,779 INFO L225 Difference]: With dead ends: 431 [2021-12-07 00:57:18,779 INFO L226 Difference]: Without dead ends: 324 [2021-12-07 00:57:18,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-12-07 00:57:18,780 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 227 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:18,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [227 Valid, 340 Invalid, 156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:18,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2021-12-07 00:57:18,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 203. [2021-12-07 00:57:18,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.386138613861386) internal successors, (280), 202 states have internal predecessors, (280), 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) [2021-12-07 00:57:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 280 transitions. [2021-12-07 00:57:18,788 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 280 transitions. Word has length 70 [2021-12-07 00:57:18,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:18,788 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 280 transitions. [2021-12-07 00:57:18,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.9) internal successors, (89), 10 states have internal predecessors, (89), 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) [2021-12-07 00:57:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 280 transitions. [2021-12-07 00:57:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:57:18,789 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:18,789 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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] [2021-12-07 00:57:18,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-12-07 00:57:18,990 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:18,991 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:18,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:18,992 INFO L85 PathProgramCache]: Analyzing trace with hash 343661932, now seen corresponding path program 1 times [2021-12-07 00:57:18,993 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:18,994 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [501169043] [2021-12-07 00:57:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:18,994 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:18,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:18,997 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:18,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-07 00:57:19,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:19,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-07 00:57:19,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 66 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 00:57:19,295 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:19,388 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 68 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-07 00:57:19,388 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:19,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [501169043] [2021-12-07 00:57:19,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [501169043] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:19,388 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:19,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-12-07 00:57:19,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863249179] [2021-12-07 00:57:19,389 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:19,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-07 00:57:19,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:19,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-07 00:57:19,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-12-07 00:57:19,390 INFO L87 Difference]: Start difference. First operand 203 states and 280 transitions. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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) [2021-12-07 00:57:19,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:19,519 INFO L93 Difference]: Finished difference Result 519 states and 706 transitions. [2021-12-07 00:57:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:19,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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 70 [2021-12-07 00:57:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:19,522 INFO L225 Difference]: With dead ends: 519 [2021-12-07 00:57:19,522 INFO L226 Difference]: Without dead ends: 349 [2021-12-07 00:57:19,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-12-07 00:57:19,523 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 265 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:19,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 265 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:19,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-12-07 00:57:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 206. [2021-12-07 00:57:19,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.3853658536585365) internal successors, (284), 205 states have internal predecessors, (284), 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) [2021-12-07 00:57:19,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 284 transitions. [2021-12-07 00:57:19,532 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 284 transitions. Word has length 70 [2021-12-07 00:57:19,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:19,532 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 284 transitions. [2021-12-07 00:57:19,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 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) [2021-12-07 00:57:19,532 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 284 transitions. [2021-12-07 00:57:19,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:57:19,533 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:19,533 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:19,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (13)] Ended with exit code 0 [2021-12-07 00:57:19,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:19,734 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:19,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:19,734 INFO L85 PathProgramCache]: Analyzing trace with hash 484210542, now seen corresponding path program 2 times [2021-12-07 00:57:19,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:19,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [62791889] [2021-12-07 00:57:19,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 00:57:19,734 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:19,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:19,735 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:19,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-12-07 00:57:19,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 00:57:19,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 00:57:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-07 00:57:19,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:22,059 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:22,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:24,770 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:24,770 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:24,770 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [62791889] [2021-12-07 00:57:24,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [62791889] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:24,770 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:24,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 44 [2021-12-07 00:57:24,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857991464] [2021-12-07 00:57:24,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:24,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-12-07 00:57:24,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:24,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-12-07 00:57:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=1750, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 00:57:24,772 INFO L87 Difference]: Start difference. First operand 206 states and 284 transitions. Second operand has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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) [2021-12-07 00:57:38,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:38,112 INFO L93 Difference]: Finished difference Result 2094 states and 2890 transitions. [2021-12-07 00:57:38,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-12-07 00:57:38,113 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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) Word has length 70 [2021-12-07 00:57:38,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:38,123 INFO L225 Difference]: With dead ends: 2094 [2021-12-07 00:57:38,123 INFO L226 Difference]: Without dead ends: 1909 [2021-12-07 00:57:38,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=2223, Invalid=10887, Unknown=0, NotChecked=0, Total=13110 [2021-12-07 00:57:38,131 INFO L933 BasicCegarLoop]: 443 mSDtfsCounter, 2791 mSDsluCounter, 8276 mSDsCounter, 0 mSdLazyCounter, 4845 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2791 SdHoareTripleChecker+Valid, 8719 SdHoareTripleChecker+Invalid, 5339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 4845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:38,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2791 Valid, 8719 Invalid, 5339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 4845 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-12-07 00:57:38,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1909 states. [2021-12-07 00:57:38,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1909 to 842. [2021-12-07 00:57:38,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 1.4244946492271107) internal successors, (1198), 841 states have internal predecessors, (1198), 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) [2021-12-07 00:57:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1198 transitions. [2021-12-07 00:57:38,186 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1198 transitions. Word has length 70 [2021-12-07 00:57:38,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:38,187 INFO L470 AbstractCegarLoop]: Abstraction has 842 states and 1198 transitions. [2021-12-07 00:57:38,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.1363636363636362) internal successors, (138), 44 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) [2021-12-07 00:57:38,187 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1198 transitions. [2021-12-07 00:57:38,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:57:38,188 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:38,188 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:38,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:38,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:38,389 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:38,391 INFO L85 PathProgramCache]: Analyzing trace with hash 703065260, now seen corresponding path program 1 times [2021-12-07 00:57:38,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:38,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1412795367] [2021-12-07 00:57:38,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:38,393 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:38,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:38,395 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:38,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-07 00:57:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:38,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-07 00:57:38,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:57:38,582 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 52 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-07 00:57:38,651 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:38,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1412795367] [2021-12-07 00:57:38,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1412795367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:38,652 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:38,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-12-07 00:57:38,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724923194] [2021-12-07 00:57:38,652 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:38,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:57:38,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:38,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:57:38,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:38,653 INFO L87 Difference]: Start difference. First operand 842 states and 1198 transitions. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2021-12-07 00:57:38,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:38,769 INFO L93 Difference]: Finished difference Result 1711 states and 2443 transitions. [2021-12-07 00:57:38,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-07 00:57:38,770 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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 70 [2021-12-07 00:57:38,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:38,774 INFO L225 Difference]: With dead ends: 1711 [2021-12-07 00:57:38,774 INFO L226 Difference]: Without dead ends: 908 [2021-12-07 00:57:38,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 132 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:38,776 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 33 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 242 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 242 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:38,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 85 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 242 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-07 00:57:38,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 908 states. [2021-12-07 00:57:38,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 908 to 738. [2021-12-07 00:57:38,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 738 states, 737 states have (on average 1.383989145183175) internal successors, (1020), 737 states have internal predecessors, (1020), 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) [2021-12-07 00:57:38,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1020 transitions. [2021-12-07 00:57:38,812 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1020 transitions. Word has length 70 [2021-12-07 00:57:38,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:38,813 INFO L470 AbstractCegarLoop]: Abstraction has 738 states and 1020 transitions. [2021-12-07 00:57:38,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 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) [2021-12-07 00:57:38,813 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1020 transitions. [2021-12-07 00:57:38,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-07 00:57:38,814 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:38,814 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:38,821 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-12-07 00:57:39,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:39,016 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:39,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:39,017 INFO L85 PathProgramCache]: Analyzing trace with hash -247756884, now seen corresponding path program 1 times [2021-12-07 00:57:39,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:39,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556204066] [2021-12-07 00:57:39,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:39,019 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:39,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:39,021 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:39,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-12-07 00:57:39,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:39,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:57:39,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 45 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-12-07 00:57:39,170 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-07 00:57:39,170 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:39,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556204066] [2021-12-07 00:57:39,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556204066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-07 00:57:39,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-07 00:57:39,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-07 00:57:39,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202915586] [2021-12-07 00:57:39,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-07 00:57:39,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-07 00:57:39,171 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:39,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-07 00:57:39,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:39,171 INFO L87 Difference]: Start difference. First operand 738 states and 1020 transitions. Second operand has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 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) [2021-12-07 00:57:39,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:39,283 INFO L93 Difference]: Finished difference Result 1301 states and 1770 transitions. [2021-12-07 00:57:39,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-07 00:57:39,283 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 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 70 [2021-12-07 00:57:39,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:39,288 INFO L225 Difference]: With dead ends: 1301 [2021-12-07 00:57:39,288 INFO L226 Difference]: Without dead ends: 1131 [2021-12-07 00:57:39,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-07 00:57:39,289 INFO L933 BasicCegarLoop]: 129 mSDtfsCounter, 149 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 82 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:39,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 432 Invalid, 288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 82 Unchecked, 0.1s Time] [2021-12-07 00:57:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-12-07 00:57:39,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 732. [2021-12-07 00:57:39,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 1.387140902872777) internal successors, (1014), 731 states have internal predecessors, (1014), 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) [2021-12-07 00:57:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 1014 transitions. [2021-12-07 00:57:39,317 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 1014 transitions. Word has length 70 [2021-12-07 00:57:39,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:39,317 INFO L470 AbstractCegarLoop]: Abstraction has 732 states and 1014 transitions. [2021-12-07 00:57:39,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 7.428571428571429) internal successors, (52), 7 states have internal predecessors, (52), 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) [2021-12-07 00:57:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 1014 transitions. [2021-12-07 00:57:39,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-12-07 00:57:39,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:39,319 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-12-07 00:57:39,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-12-07 00:57:39,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:39,519 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:39,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:39,520 INFO L85 PathProgramCache]: Analyzing trace with hash 946149333, now seen corresponding path program 1 times [2021-12-07 00:57:39,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:39,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105030711] [2021-12-07 00:57:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:39,520 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:39,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:39,521 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:39,521 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-12-07 00:57:39,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:39,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-07 00:57:39,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:39,738 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 63 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:57:39,738 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:57:39,886 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:39,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105030711] [2021-12-07 00:57:39,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105030711] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:39,886 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:39,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-12-07 00:57:39,887 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440242594] [2021-12-07 00:57:39,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:39,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-07 00:57:39,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:39,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-07 00:57:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-12-07 00:57:39,888 INFO L87 Difference]: Start difference. First operand 732 states and 1014 transitions. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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) [2021-12-07 00:57:40,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:40,044 INFO L93 Difference]: Finished difference Result 965 states and 1314 transitions. [2021-12-07 00:57:40,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:40,044 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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 72 [2021-12-07 00:57:40,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:40,047 INFO L225 Difference]: With dead ends: 965 [2021-12-07 00:57:40,047 INFO L226 Difference]: Without dead ends: 795 [2021-12-07 00:57:40,048 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:57:40,048 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 83 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 167 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:40,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 170 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 207 Invalid, 0 Unknown, 167 Unchecked, 0.1s Time] [2021-12-07 00:57:40,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-12-07 00:57:40,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 795. [2021-12-07 00:57:40,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 795 states, 794 states have (on average 1.3602015113350125) internal successors, (1080), 794 states have internal predecessors, (1080), 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) [2021-12-07 00:57:40,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 795 states to 795 states and 1080 transitions. [2021-12-07 00:57:40,076 INFO L78 Accepts]: Start accepts. Automaton has 795 states and 1080 transitions. Word has length 72 [2021-12-07 00:57:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:40,076 INFO L470 AbstractCegarLoop]: Abstraction has 795 states and 1080 transitions. [2021-12-07 00:57:40,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 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) [2021-12-07 00:57:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 795 states and 1080 transitions. [2021-12-07 00:57:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-12-07 00:57:40,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:40,078 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:40,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-12-07 00:57:40,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:40,278 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:40,279 INFO L85 PathProgramCache]: Analyzing trace with hash -1891529833, now seen corresponding path program 1 times [2021-12-07 00:57:40,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:40,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [80569012] [2021-12-07 00:57:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:40,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:40,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:40,281 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:40,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-12-07 00:57:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:57:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:40,544 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 63 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:57:40,545 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:40,701 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 53 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 00:57:40,702 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:40,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [80569012] [2021-12-07 00:57:40,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [80569012] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:40,702 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:40,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-07 00:57:40,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896622389] [2021-12-07 00:57:40,702 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:40,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:57:40,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:40,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:57:40,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:57:40,703 INFO L87 Difference]: Start difference. First operand 795 states and 1080 transitions. Second operand has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 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) [2021-12-07 00:57:40,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:57:40,868 INFO L93 Difference]: Finished difference Result 1307 states and 1765 transitions. [2021-12-07 00:57:40,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-07 00:57:40,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 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 73 [2021-12-07 00:57:40,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:57:40,873 INFO L225 Difference]: With dead ends: 1307 [2021-12-07 00:57:40,873 INFO L226 Difference]: Without dead ends: 1137 [2021-12-07 00:57:40,873 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-12-07 00:57:40,874 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 168 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 283 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:57:40,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 218 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 243 Invalid, 0 Unknown, 283 Unchecked, 0.1s Time] [2021-12-07 00:57:40,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-12-07 00:57:40,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 834. [2021-12-07 00:57:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 833 states have (on average 1.3457382953181272) internal successors, (1121), 833 states have internal predecessors, (1121), 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) [2021-12-07 00:57:40,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1121 transitions. [2021-12-07 00:57:40,905 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1121 transitions. Word has length 73 [2021-12-07 00:57:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:57:40,905 INFO L470 AbstractCegarLoop]: Abstraction has 834 states and 1121 transitions. [2021-12-07 00:57:40,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 9.0) internal successors, (108), 12 states have internal predecessors, (108), 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) [2021-12-07 00:57:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1121 transitions. [2021-12-07 00:57:40,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 00:57:40,906 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:57:40,906 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:57:40,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-12-07 00:57:41,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:57:41,107 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:57:41,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:57:41,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1135042114, now seen corresponding path program 1 times [2021-12-07 00:57:41,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:57:41,108 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [349887350] [2021-12-07 00:57:41,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:57:41,108 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:57:41,108 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:57:41,109 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:57:41,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-12-07 00:57:41,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:57:41,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-07 00:57:41,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:57:43,770 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:43,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:57:47,520 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:57:47,521 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:57:47,521 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [349887350] [2021-12-07 00:57:47,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [349887350] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:57:47,521 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:57:47,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-12-07 00:57:47,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983968769] [2021-12-07 00:57:47,521 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:57:47,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:57:47,522 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:57:47,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:57:47,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=1921, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:57:47,523 INFO L87 Difference]: Start difference. First operand 834 states and 1121 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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) [2021-12-07 00:58:41,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:58:41,372 INFO L93 Difference]: Finished difference Result 5938 states and 7750 transitions. [2021-12-07 00:58:41,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-07 00:58:41,373 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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 74 [2021-12-07 00:58:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:58:41,390 INFO L225 Difference]: With dead ends: 5938 [2021-12-07 00:58:41,390 INFO L226 Difference]: Without dead ends: 5205 [2021-12-07 00:58:41,404 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 345 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18854 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=7813, Invalid=51967, Unknown=0, NotChecked=0, Total=59780 [2021-12-07 00:58:41,404 INFO L933 BasicCegarLoop]: 719 mSDtfsCounter, 2315 mSDsluCounter, 15772 mSDsCounter, 0 mSdLazyCounter, 9340 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2315 SdHoareTripleChecker+Valid, 16491 SdHoareTripleChecker+Invalid, 9868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 9340 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2021-12-07 00:58:41,404 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2315 Valid, 16491 Invalid, 9868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 9340 Invalid, 0 Unknown, 0 Unchecked, 9.8s Time] [2021-12-07 00:58:41,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5205 states. [2021-12-07 00:58:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5205 to 2616. [2021-12-07 00:58:41,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2616 states, 2615 states have (on average 1.3812619502868069) internal successors, (3612), 2615 states have internal predecessors, (3612), 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) [2021-12-07 00:58:41,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2616 states to 2616 states and 3612 transitions. [2021-12-07 00:58:41,519 INFO L78 Accepts]: Start accepts. Automaton has 2616 states and 3612 transitions. Word has length 74 [2021-12-07 00:58:41,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:58:41,520 INFO L470 AbstractCegarLoop]: Abstraction has 2616 states and 3612 transitions. [2021-12-07 00:58:41,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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) [2021-12-07 00:58:41,520 INFO L276 IsEmpty]: Start isEmpty. Operand 2616 states and 3612 transitions. [2021-12-07 00:58:41,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-07 00:58:41,522 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:58:41,522 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 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] [2021-12-07 00:58:41,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (19)] Ended with exit code 0 [2021-12-07 00:58:41,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:58:41,723 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:58:41,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:58:41,724 INFO L85 PathProgramCache]: Analyzing trace with hash -777616002, now seen corresponding path program 1 times [2021-12-07 00:58:41,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:58:41,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [851627518] [2021-12-07 00:58:41,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:58:41,725 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:58:41,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:58:41,726 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:58:41,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-12-07 00:58:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:58:41,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-12-07 00:58:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:58:44,269 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:58:44,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:58:47,301 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:58:47,302 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:58:47,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [851627518] [2021-12-07 00:58:47,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [851627518] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:58:47,302 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:58:47,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 46 [2021-12-07 00:58:47,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020306978] [2021-12-07 00:58:47,302 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:58:47,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-12-07 00:58:47,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:58:47,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-12-07 00:58:47,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=1933, Unknown=0, NotChecked=0, Total=2070 [2021-12-07 00:58:47,303 INFO L87 Difference]: Start difference. First operand 2616 states and 3612 transitions. Second operand has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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) [2021-12-07 00:59:13,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:13,293 INFO L93 Difference]: Finished difference Result 5989 states and 7987 transitions. [2021-12-07 00:59:13,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-12-07 00:59:13,294 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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 74 [2021-12-07 00:59:13,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:13,311 INFO L225 Difference]: With dead ends: 5989 [2021-12-07 00:59:13,311 INFO L226 Difference]: Without dead ends: 4942 [2021-12-07 00:59:13,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5484 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=2769, Invalid=19283, Unknown=0, NotChecked=0, Total=22052 [2021-12-07 00:59:13,314 INFO L933 BasicCegarLoop]: 486 mSDtfsCounter, 1578 mSDsluCounter, 8949 mSDsCounter, 0 mSdLazyCounter, 5183 mSolverCounterSat, 285 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 9435 SdHoareTripleChecker+Invalid, 5468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 285 IncrementalHoareTripleChecker+Valid, 5183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:13,314 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1578 Valid, 9435 Invalid, 5468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [285 Valid, 5183 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-12-07 00:59:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-12-07 00:59:13,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 2839. [2021-12-07 00:59:13,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 1.383368569415081) internal successors, (3926), 2838 states have internal predecessors, (3926), 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) [2021-12-07 00:59:13,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 3926 transitions. [2021-12-07 00:59:13,435 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 3926 transitions. Word has length 74 [2021-12-07 00:59:13,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:13,435 INFO L470 AbstractCegarLoop]: Abstraction has 2839 states and 3926 transitions. [2021-12-07 00:59:13,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.1739130434782608) internal successors, (146), 46 states have internal predecessors, (146), 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) [2021-12-07 00:59:13,435 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 3926 transitions. [2021-12-07 00:59:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-12-07 00:59:13,437 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:13,438 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 00:59:13,444 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (20)] Ended with exit code 0 [2021-12-07 00:59:13,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:59:13,639 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:13,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:13,640 INFO L85 PathProgramCache]: Analyzing trace with hash -1420916641, now seen corresponding path program 1 times [2021-12-07 00:59:13,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:59:13,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320254367] [2021-12-07 00:59:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:13,643 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:59:13,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:59:13,646 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:59:13,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Waiting until timeout for monitored process [2021-12-07 00:59:13,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:13,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-07 00:59:13,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:59:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:13,900 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:59:14,018 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 14 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:14,018 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:59:14,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320254367] [2021-12-07 00:59:14,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320254367] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:59:14,019 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:59:14,019 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-07 00:59:14,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604727159] [2021-12-07 00:59:14,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:59:14,019 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-07 00:59:14,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:59:14,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-07 00:59:14,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-12-07 00:59:14,020 INFO L87 Difference]: Start difference. First operand 2839 states and 3926 transitions. Second operand has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 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) [2021-12-07 00:59:14,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 00:59:14,369 INFO L93 Difference]: Finished difference Result 4113 states and 5656 transitions. [2021-12-07 00:59:14,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-12-07 00:59:14,370 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 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 76 [2021-12-07 00:59:14,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 00:59:14,384 INFO L225 Difference]: With dead ends: 4113 [2021-12-07 00:59:14,384 INFO L226 Difference]: Without dead ends: 4080 [2021-12-07 00:59:14,384 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-12-07 00:59:14,385 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 72 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-07 00:59:14,385 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 188 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 231 Invalid, 0 Unknown, 68 Unchecked, 0.1s Time] [2021-12-07 00:59:14,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4080 states. [2021-12-07 00:59:14,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4080 to 4014. [2021-12-07 00:59:14,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4014 states, 4013 states have (on average 1.3765262895589334) internal successors, (5524), 4013 states have internal predecessors, (5524), 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) [2021-12-07 00:59:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4014 states to 4014 states and 5524 transitions. [2021-12-07 00:59:14,555 INFO L78 Accepts]: Start accepts. Automaton has 4014 states and 5524 transitions. Word has length 76 [2021-12-07 00:59:14,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 00:59:14,555 INFO L470 AbstractCegarLoop]: Abstraction has 4014 states and 5524 transitions. [2021-12-07 00:59:14,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.583333333333334) internal successors, (127), 12 states have internal predecessors, (127), 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) [2021-12-07 00:59:14,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4014 states and 5524 transitions. [2021-12-07 00:59:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 00:59:14,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 00:59:14,558 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-07 00:59:14,564 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (21)] Ended with exit code 0 [2021-12-07 00:59:14,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 00:59:14,759 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 00:59:14,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 00:59:14,760 INFO L85 PathProgramCache]: Analyzing trace with hash 881251465, now seen corresponding path program 1 times [2021-12-07 00:59:14,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 00:59:14,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [116872753] [2021-12-07 00:59:14,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 00:59:14,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 00:59:14,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 00:59:14,764 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 00:59:14,767 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-12-07 00:59:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 00:59:14,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-07 00:59:14,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 00:59:18,179 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:18,179 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 00:59:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 00:59:23,372 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 00:59:23,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [116872753] [2021-12-07 00:59:23,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [116872753] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 00:59:23,372 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 00:59:23,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-07 00:59:23,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033917868] [2021-12-07 00:59:23,372 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 00:59:23,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 00:59:23,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 00:59:23,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 00:59:23,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=2277, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 00:59:23,373 INFO L87 Difference]: Start difference. First operand 4014 states and 5524 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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) [2021-12-07 01:00:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:00:32,557 INFO L93 Difference]: Finished difference Result 7077 states and 9387 transitions. [2021-12-07 01:00:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2021-12-07 01:00:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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) Word has length 77 [2021-12-07 01:00:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:00:32,585 INFO L225 Difference]: With dead ends: 7077 [2021-12-07 01:00:32,586 INFO L226 Difference]: Without dead ends: 6787 [2021-12-07 01:00:32,590 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17965 ImplicationChecksByTransitivity, 62.9s TimeCoverageRelationStatistics Valid=7794, Invalid=51498, Unknown=0, NotChecked=0, Total=59292 [2021-12-07 01:00:32,591 INFO L933 BasicCegarLoop]: 475 mSDtfsCounter, 2647 mSDsluCounter, 12819 mSDsCounter, 0 mSdLazyCounter, 8026 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2647 SdHoareTripleChecker+Valid, 13294 SdHoareTripleChecker+Invalid, 8702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 8026 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:00:32,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2647 Valid, 13294 Invalid, 8702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [676 Valid, 8026 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2021-12-07 01:00:32,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6787 states. [2021-12-07 01:00:32,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6787 to 5239. [2021-12-07 01:00:32,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5239 states, 5238 states have (on average 1.375143184421535) internal successors, (7203), 5238 states have internal predecessors, (7203), 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) [2021-12-07 01:00:32,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5239 states to 5239 states and 7203 transitions. [2021-12-07 01:00:32,823 INFO L78 Accepts]: Start accepts. Automaton has 5239 states and 7203 transitions. Word has length 77 [2021-12-07 01:00:32,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:00:32,823 INFO L470 AbstractCegarLoop]: Abstraction has 5239 states and 7203 transitions. [2021-12-07 01:00:32,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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) [2021-12-07 01:00:32,823 INFO L276 IsEmpty]: Start isEmpty. Operand 5239 states and 7203 transitions. [2021-12-07 01:00:32,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 01:00:32,827 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:00:32,828 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-07 01:00:32,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (22)] Ended with exit code 0 [2021-12-07 01:00:33,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:00:33,029 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:00:33,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:00:33,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1269946569, now seen corresponding path program 2 times [2021-12-07 01:00:33,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:00:33,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [723124321] [2021-12-07 01:00:33,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:00:33,032 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:00:33,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:00:33,034 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:00:33,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Waiting until timeout for monitored process [2021-12-07 01:00:33,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:00:33,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:00:33,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:00:33,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:00:36,441 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:00:36,441 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:00:40,824 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:00:40,824 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:00:40,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [723124321] [2021-12-07 01:00:40,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [723124321] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:00:40,824 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:00:40,824 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-07 01:00:40,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163671842] [2021-12-07 01:00:40,825 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:00:40,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 01:00:40,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:00:40,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 01:00:40,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=2267, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 01:00:40,826 INFO L87 Difference]: Start difference. First operand 5239 states and 7203 transitions. Second operand has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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) [2021-12-07 01:02:40,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:02:40,642 INFO L93 Difference]: Finished difference Result 12480 states and 16618 transitions. [2021-12-07 01:02:40,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 296 states. [2021-12-07 01:02:40,643 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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) Word has length 77 [2021-12-07 01:02:40,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:02:40,664 INFO L225 Difference]: With dead ends: 12480 [2021-12-07 01:02:40,664 INFO L226 Difference]: Without dead ends: 11236 [2021-12-07 01:02:40,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42482 ImplicationChecksByTransitivity, 107.1s TimeCoverageRelationStatistics Valid=13278, Invalid=104028, Unknown=0, NotChecked=0, Total=117306 [2021-12-07 01:02:40,672 INFO L933 BasicCegarLoop]: 820 mSDtfsCounter, 3244 mSDsluCounter, 17491 mSDsCounter, 0 mSdLazyCounter, 10215 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3244 SdHoareTripleChecker+Valid, 18311 SdHoareTripleChecker+Invalid, 11082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 10215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:02:40,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3244 Valid, 18311 Invalid, 11082 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [867 Valid, 10215 Invalid, 0 Unknown, 0 Unchecked, 16.2s Time] [2021-12-07 01:02:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11236 states. [2021-12-07 01:02:41,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11236 to 7645. [2021-12-07 01:02:41,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7645 states, 7644 states have (on average 1.3903715332286761) internal successors, (10628), 7644 states have internal predecessors, (10628), 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) [2021-12-07 01:02:41,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7645 states to 7645 states and 10628 transitions. [2021-12-07 01:02:41,031 INFO L78 Accepts]: Start accepts. Automaton has 7645 states and 10628 transitions. Word has length 77 [2021-12-07 01:02:41,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:02:41,031 INFO L470 AbstractCegarLoop]: Abstraction has 7645 states and 10628 transitions. [2021-12-07 01:02:41,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.04) internal successors, (152), 50 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) [2021-12-07 01:02:41,031 INFO L276 IsEmpty]: Start isEmpty. Operand 7645 states and 10628 transitions. [2021-12-07 01:02:41,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-12-07 01:02:41,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:02:41,034 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 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] [2021-12-07 01:02:41,041 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (23)] Ended with exit code 0 [2021-12-07 01:02:41,235 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:02:41,236 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:02:41,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:02:41,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1690097737, now seen corresponding path program 3 times [2021-12-07 01:02:41,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:02:41,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [866289336] [2021-12-07 01:02:41,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:02:41,239 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:02:41,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:02:41,241 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:02:41,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Waiting until timeout for monitored process [2021-12-07 01:02:41,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 01:02:41,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:02:41,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:02:41,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:02:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:02:44,465 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:02:49,063 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:02:49,063 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:02:49,063 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [866289336] [2021-12-07 01:02:49,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [866289336] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:02:49,063 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:02:49,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-12-07 01:02:49,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377037424] [2021-12-07 01:02:49,063 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:02:49,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-07 01:02:49,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:02:49,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-07 01:02:49,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2197, Unknown=0, NotChecked=0, Total=2352 [2021-12-07 01:02:49,065 INFO L87 Difference]: Start difference. First operand 7645 states and 10628 transitions. Second operand has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 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) [2021-12-07 01:03:51,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:51,853 INFO L93 Difference]: Finished difference Result 19003 states and 25917 transitions. [2021-12-07 01:03:51,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2021-12-07 01:03:51,854 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 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) Word has length 77 [2021-12-07 01:03:51,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:51,872 INFO L225 Difference]: With dead ends: 19003 [2021-12-07 01:03:51,873 INFO L226 Difference]: Without dead ends: 15342 [2021-12-07 01:03:51,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14578 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=7022, Invalid=42484, Unknown=0, NotChecked=0, Total=49506 [2021-12-07 01:03:51,878 INFO L933 BasicCegarLoop]: 557 mSDtfsCounter, 2547 mSDsluCounter, 13430 mSDsCounter, 0 mSdLazyCounter, 8279 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2547 SdHoareTripleChecker+Valid, 13987 SdHoareTripleChecker+Invalid, 8844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 8279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.9s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:51,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2547 Valid, 13987 Invalid, 8844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 8279 Invalid, 0 Unknown, 0 Unchecked, 11.9s Time] [2021-12-07 01:03:51,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15342 states. [2021-12-07 01:03:52,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15342 to 11431. [2021-12-07 01:03:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11431 states, 11430 states have (on average 1.4072615923009624) internal successors, (16085), 11430 states have internal predecessors, (16085), 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) [2021-12-07 01:03:52,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11431 states to 11431 states and 16085 transitions. [2021-12-07 01:03:52,409 INFO L78 Accepts]: Start accepts. Automaton has 11431 states and 16085 transitions. Word has length 77 [2021-12-07 01:03:52,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:52,409 INFO L470 AbstractCegarLoop]: Abstraction has 11431 states and 16085 transitions. [2021-12-07 01:03:52,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.1020408163265305) internal successors, (152), 49 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) [2021-12-07 01:03:52,409 INFO L276 IsEmpty]: Start isEmpty. Operand 11431 states and 16085 transitions. [2021-12-07 01:03:52,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-12-07 01:03:52,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:52,413 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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] [2021-12-07 01:03:52,420 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (24)] Forceful destruction successful, exit code 0 [2021-12-07 01:03:52,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:03:52,614 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:03:52,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:52,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1471420594, now seen corresponding path program 1 times [2021-12-07 01:03:52,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:03:52,617 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1615728623] [2021-12-07 01:03:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:52,617 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:03:52,618 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:03:52,620 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:03:52,622 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-12-07 01:03:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:52,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-12-07 01:03:52,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:52,917 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 71 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:03:52,918 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:03:53,086 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 61 proven. 21 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-07 01:03:53,086 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:03:53,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1615728623] [2021-12-07 01:03:53,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1615728623] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:03:53,087 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:03:53,087 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-12-07 01:03:53,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335583520] [2021-12-07 01:03:53,087 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:03:53,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-07 01:03:53,087 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:03:53,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-07 01:03:53,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-12-07 01:03:53,088 INFO L87 Difference]: Start difference. First operand 11431 states and 16085 transitions. Second operand has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 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) [2021-12-07 01:03:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:54,107 INFO L93 Difference]: Finished difference Result 20288 states and 28483 transitions. [2021-12-07 01:03:54,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-07 01:03:54,108 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 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 78 [2021-12-07 01:03:54,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:54,118 INFO L225 Difference]: With dead ends: 20288 [2021-12-07 01:03:54,118 INFO L226 Difference]: Without dead ends: 8923 [2021-12-07 01:03:54,125 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=150, Invalid=552, Unknown=0, NotChecked=0, Total=702 [2021-12-07 01:03:54,125 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 253 mSDsluCounter, 448 mSDsCounter, 0 mSdLazyCounter, 1015 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 540 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 367 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:54,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [253 Valid, 540 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1015 Invalid, 0 Unknown, 367 Unchecked, 0.4s Time] [2021-12-07 01:03:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8923 states. [2021-12-07 01:03:54,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8923 to 6725. [2021-12-07 01:03:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6725 states, 6724 states have (on average 1.3480071386079715) internal successors, (9064), 6724 states have internal predecessors, (9064), 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) [2021-12-07 01:03:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6725 states to 6725 states and 9064 transitions. [2021-12-07 01:03:54,533 INFO L78 Accepts]: Start accepts. Automaton has 6725 states and 9064 transitions. Word has length 78 [2021-12-07 01:03:54,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:54,533 INFO L470 AbstractCegarLoop]: Abstraction has 6725 states and 9064 transitions. [2021-12-07 01:03:54,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 8.214285714285714) internal successors, (115), 14 states have internal predecessors, (115), 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) [2021-12-07 01:03:54,533 INFO L276 IsEmpty]: Start isEmpty. Operand 6725 states and 9064 transitions. [2021-12-07 01:03:54,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-12-07 01:03:54,535 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:54,535 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 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, 1] [2021-12-07 01:03:54,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-12-07 01:03:54,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:03:54,736 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:03:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:54,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1964091451, now seen corresponding path program 1 times [2021-12-07 01:03:54,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:03:54,739 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1603103590] [2021-12-07 01:03:54,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:54,739 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:03:54,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:03:54,741 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:03:54,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Waiting until timeout for monitored process [2021-12-07 01:03:54,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:54,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-07 01:03:54,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:03:55,262 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 50 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:03:55,262 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:03:55,789 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 37 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:03:55,789 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:03:55,789 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1603103590] [2021-12-07 01:03:55,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1603103590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:03:55,790 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:03:55,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-12-07 01:03:55,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433038358] [2021-12-07 01:03:55,790 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:03:55,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-12-07 01:03:55,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:03:55,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-12-07 01:03:55,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-12-07 01:03:55,791 INFO L87 Difference]: Start difference. First operand 6725 states and 9064 transitions. Second operand has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 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) [2021-12-07 01:03:57,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:03:57,262 INFO L93 Difference]: Finished difference Result 15458 states and 20621 transitions. [2021-12-07 01:03:57,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-12-07 01:03:57,263 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 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 79 [2021-12-07 01:03:57,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:03:57,268 INFO L225 Difference]: With dead ends: 15458 [2021-12-07 01:03:57,268 INFO L226 Difference]: Without dead ends: 8455 [2021-12-07 01:03:57,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=341, Invalid=1551, Unknown=0, NotChecked=0, Total=1892 [2021-12-07 01:03:57,273 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 237 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 583 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:03:57,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 490 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 625 Invalid, 0 Unknown, 583 Unchecked, 0.4s Time] [2021-12-07 01:03:57,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8455 states. [2021-12-07 01:03:57,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8455 to 8122. [2021-12-07 01:03:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8122 states, 8121 states have (on average 1.3261913557443665) internal successors, (10770), 8121 states have internal predecessors, (10770), 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) [2021-12-07 01:03:57,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8122 states to 8122 states and 10770 transitions. [2021-12-07 01:03:57,718 INFO L78 Accepts]: Start accepts. Automaton has 8122 states and 10770 transitions. Word has length 79 [2021-12-07 01:03:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:03:57,719 INFO L470 AbstractCegarLoop]: Abstraction has 8122 states and 10770 transitions. [2021-12-07 01:03:57,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.958333333333333) internal successors, (143), 24 states have internal predecessors, (143), 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) [2021-12-07 01:03:57,719 INFO L276 IsEmpty]: Start isEmpty. Operand 8122 states and 10770 transitions. [2021-12-07 01:03:57,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 01:03:57,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:03:57,721 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:03:57,728 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (26)] Ended with exit code 0 [2021-12-07 01:03:57,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:03:57,922 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:03:57,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:03:57,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1794630633, now seen corresponding path program 1 times [2021-12-07 01:03:57,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:03:57,924 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869752771] [2021-12-07 01:03:57,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-07 01:03:57,924 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:03:57,925 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:03:57,926 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:03:57,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Waiting until timeout for monitored process [2021-12-07 01:03:58,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-07 01:03:58,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 46 conjunts are in the unsatisfiable core [2021-12-07 01:03:58,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:04:01,906 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:04:01,907 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:04:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:04:07,814 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:04:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869752771] [2021-12-07 01:04:07,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869752771] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:04:07,814 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:04:07,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-07 01:04:07,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239883231] [2021-12-07 01:04:07,814 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:04:07,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 01:04:07,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:04:07,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 01:04:07,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=2285, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 01:04:07,815 INFO L87 Difference]: Start difference. First operand 8122 states and 10770 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 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) [2021-12-07 01:06:07,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:06:07,559 INFO L93 Difference]: Finished difference Result 16160 states and 20603 transitions. [2021-12-07 01:06:07,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 271 states. [2021-12-07 01:06:07,560 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 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 80 [2021-12-07 01:06:07,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:06:07,571 INFO L225 Difference]: With dead ends: 16160 [2021-12-07 01:06:07,571 INFO L226 Difference]: Without dead ends: 15968 [2021-12-07 01:06:07,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 425 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 315 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36101 ImplicationChecksByTransitivity, 108.0s TimeCoverageRelationStatistics Valid=10063, Invalid=90109, Unknown=0, NotChecked=0, Total=100172 [2021-12-07 01:06:07,577 INFO L933 BasicCegarLoop]: 593 mSDtfsCounter, 2968 mSDsluCounter, 15882 mSDsCounter, 0 mSdLazyCounter, 9440 mSolverCounterSat, 867 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2968 SdHoareTripleChecker+Valid, 16475 SdHoareTripleChecker+Invalid, 10307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 867 IncrementalHoareTripleChecker+Valid, 9440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.4s IncrementalHoareTripleChecker+Time [2021-12-07 01:06:07,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2968 Valid, 16475 Invalid, 10307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [867 Valid, 9440 Invalid, 0 Unknown, 0 Unchecked, 16.4s Time] [2021-12-07 01:06:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15968 states. [2021-12-07 01:06:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15968 to 10481. [2021-12-07 01:06:08,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10481 states, 10480 states have (on average 1.3251908396946566) internal successors, (13888), 10480 states have internal predecessors, (13888), 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) [2021-12-07 01:06:08,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10481 states to 10481 states and 13888 transitions. [2021-12-07 01:06:08,158 INFO L78 Accepts]: Start accepts. Automaton has 10481 states and 13888 transitions. Word has length 80 [2021-12-07 01:06:08,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:06:08,158 INFO L470 AbstractCegarLoop]: Abstraction has 10481 states and 13888 transitions. [2021-12-07 01:06:08,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 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) [2021-12-07 01:06:08,158 INFO L276 IsEmpty]: Start isEmpty. Operand 10481 states and 13888 transitions. [2021-12-07 01:06:08,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 01:06:08,160 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:06:08,160 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:06:08,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (27)] Ended with exit code 0 [2021-12-07 01:06:08,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:06:08,361 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:06:08,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:06:08,363 INFO L85 PathProgramCache]: Analyzing trace with hash 1519845463, now seen corresponding path program 2 times [2021-12-07 01:06:08,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:06:08,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1913503080] [2021-12-07 01:06:08,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-07 01:06:08,364 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:06:08,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:06:08,367 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:06:08,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-12-07 01:06:08,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-07 01:06:08,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:06:08,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:06:08,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:06:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:06:12,154 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:06:17,422 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:06:17,422 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:06:17,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1913503080] [2021-12-07 01:06:17,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1913503080] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:06:17,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:06:17,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-07 01:06:17,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907753054] [2021-12-07 01:06:17,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:06:17,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 01:06:17,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:06:17,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 01:06:17,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2289, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 01:06:17,423 INFO L87 Difference]: Start difference. First operand 10481 states and 13888 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 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) [2021-12-07 01:08:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-07 01:08:12,386 INFO L93 Difference]: Finished difference Result 23302 states and 30038 transitions. [2021-12-07 01:08:12,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 252 states. [2021-12-07 01:08:12,387 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 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 80 [2021-12-07 01:08:12,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-07 01:08:12,401 INFO L225 Difference]: With dead ends: 23302 [2021-12-07 01:08:12,401 INFO L226 Difference]: Without dead ends: 18591 [2021-12-07 01:08:12,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31146 ImplicationChecksByTransitivity, 101.4s TimeCoverageRelationStatistics Valid=7568, Invalid=80938, Unknown=0, NotChecked=0, Total=88506 [2021-12-07 01:08:12,408 INFO L933 BasicCegarLoop]: 759 mSDtfsCounter, 2579 mSDsluCounter, 17322 mSDsCounter, 0 mSdLazyCounter, 10684 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2579 SdHoareTripleChecker+Valid, 18081 SdHoareTripleChecker+Invalid, 11406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 10684 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.2s IncrementalHoareTripleChecker+Time [2021-12-07 01:08:12,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2579 Valid, 18081 Invalid, 11406 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [722 Valid, 10684 Invalid, 0 Unknown, 0 Unchecked, 17.2s Time] [2021-12-07 01:08:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18591 states. [2021-12-07 01:08:13,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18591 to 11592. [2021-12-07 01:08:13,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11592 states, 11591 states have (on average 1.3223190406349754) internal successors, (15327), 11591 states have internal predecessors, (15327), 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) [2021-12-07 01:08:13,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11592 states to 11592 states and 15327 transitions. [2021-12-07 01:08:13,103 INFO L78 Accepts]: Start accepts. Automaton has 11592 states and 15327 transitions. Word has length 80 [2021-12-07 01:08:13,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-07 01:08:13,103 INFO L470 AbstractCegarLoop]: Abstraction has 11592 states and 15327 transitions. [2021-12-07 01:08:13,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 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) [2021-12-07 01:08:13,104 INFO L276 IsEmpty]: Start isEmpty. Operand 11592 states and 15327 transitions. [2021-12-07 01:08:13,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-12-07 01:08:13,105 INFO L506 BasicCegarLoop]: Found error trace [2021-12-07 01:08:13,105 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-07 01:08:13,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-12-07 01:08:13,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 [2021-12-07 01:08:13,306 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-07 01:08:13,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-07 01:08:13,307 INFO L85 PathProgramCache]: Analyzing trace with hash -825823845, now seen corresponding path program 3 times [2021-12-07 01:08:13,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-07 01:08:13,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [804146124] [2021-12-07 01:08:13,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-07 01:08:13,309 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-07 01:08:13,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat [2021-12-07 01:08:13,311 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-07 01:08:13,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_030f898e-3cd5-4dcb-a868-51a867249742/bin/uautomizer-DrprNOufMa/mathsat -unsat_core_generation=3 (29)] Waiting until timeout for monitored process [2021-12-07 01:08:13,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-12-07 01:08:13,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-07 01:08:13,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-12-07 01:08:13,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-07 01:08:16,606 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:08:16,606 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-07 01:08:22,006 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-07 01:08:22,006 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-07 01:08:22,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [804146124] [2021-12-07 01:08:22,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [804146124] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-07 01:08:22,006 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-07 01:08:22,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 50 [2021-12-07 01:08:22,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318813431] [2021-12-07 01:08:22,007 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-07 01:08:22,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-12-07 01:08:22,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-07 01:08:22,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-12-07 01:08:22,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=2284, Unknown=0, NotChecked=0, Total=2450 [2021-12-07 01:08:22,008 INFO L87 Difference]: Start difference. First operand 11592 states and 15327 transitions. Second operand has 50 states, 50 states have (on average 3.16) internal successors, (158), 50 states have internal predecessors, (158), 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)