./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 13:20:57,088 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 13:20:57,090 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 13:20:57,139 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 13:20:57,140 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 13:20:57,141 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 13:20:57,142 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 13:20:57,143 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 13:20:57,144 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 13:20:57,144 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 13:20:57,145 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 13:20:57,146 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 13:20:57,146 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 13:20:57,147 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 13:20:57,147 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 13:20:57,148 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 13:20:57,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 13:20:57,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 13:20:57,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 13:20:57,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 13:20:57,154 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 13:20:57,160 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 13:20:57,161 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 13:20:57,162 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 13:20:57,163 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 13:20:57,166 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 13:20:57,166 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 13:20:57,167 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 13:20:57,167 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 13:20:57,168 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 13:20:57,168 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 13:20:57,169 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 13:20:57,169 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 13:20:57,170 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 13:20:57,171 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 13:20:57,172 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 13:20:57,172 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 13:20:57,173 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 13:20:57,173 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 13:20:57,174 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 13:20:57,174 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 13:20:57,175 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 13:20:57,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 13:20:57,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 13:20:57,199 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 13:20:57,199 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 13:20:57,200 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 13:20:57,200 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 13:20:57,201 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 13:20:57,201 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 13:20:57,201 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 13:20:57,201 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 13:20:57,202 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 13:20:57,202 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 13:20:57,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 13:20:57,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 13:20:57,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 13:20:57,203 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 13:20:57,203 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 13:20:57,203 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 13:20:57,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 13:20:57,204 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 13:20:57,204 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 13:20:57,204 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 13:20:57,204 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 13:20:57,204 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 13:20:57,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:20:57,205 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 13:20:57,205 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 13:20:57,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 13:20:57,206 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 13:20:57,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 13:20:57,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 13:20:57,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 13:20:57,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 13:20:57,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 13:20:57,207 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 74e63e86abbcab22438f70ee6d7d7ef12eaada509b0f0a56fb5cf815aaf53aab [2021-12-21 13:20:57,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 13:20:57,448 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 13:20:57,450 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 13:20:57,451 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 13:20:57,451 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 13:20:57,452 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2021-12-21 13:20:57,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eebea8200/4d37daddcc1343d7a6d73a6475488155/FLAG525d38c5d [2021-12-21 13:20:57,897 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 13:20:57,897 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i [2021-12-21 13:20:57,912 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eebea8200/4d37daddcc1343d7a6d73a6475488155/FLAG525d38c5d [2021-12-21 13:20:57,922 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/eebea8200/4d37daddcc1343d7a6d73a6475488155 [2021-12-21 13:20:57,924 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 13:20:57,924 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 13:20:57,925 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 13:20:57,926 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 13:20:57,928 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 13:20:57,928 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:20:57" (1/1) ... [2021-12-21 13:20:57,929 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3011fe9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:57, skipping insertion in model container [2021-12-21 13:20:57,929 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 01:20:57" (1/1) ... [2021-12-21 13:20:57,933 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 13:20:57,972 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 13:20:58,196 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i[36399,36412] [2021-12-21 13:20:58,202 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:20:58,209 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 13:20:58,257 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/recursive-with-pointer/system-with-recursion.i[36399,36412] [2021-12-21 13:20:58,260 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 13:20:58,284 INFO L208 MainTranslator]: Completed translation [2021-12-21 13:20:58,284 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58 WrapperNode [2021-12-21 13:20:58,285 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 13:20:58,285 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 13:20:58,286 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 13:20:58,286 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 13:20:58,290 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,312 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,347 INFO L137 Inliner]: procedures = 184, calls = 149, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 224 [2021-12-21 13:20:58,353 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 13:20:58,354 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 13:20:58,354 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 13:20:58,354 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 13:20:58,367 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,372 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,380 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,391 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,398 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,401 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,404 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 13:20:58,405 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 13:20:58,405 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 13:20:58,405 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 13:20:58,409 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (1/1) ... [2021-12-21 13:20:58,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 13:20:58,426 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:20:58,435 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 13:20:58,440 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 13:20:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 13:20:58,457 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2021-12-21 13:20:58,458 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2021-12-21 13:20:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure event_precess [2021-12-21 13:20:58,458 INFO L138 BoogieDeclarations]: Found implementation of procedure event_precess [2021-12-21 13:20:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 13:20:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-21 13:20:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure ASNull [2021-12-21 13:20:58,458 INFO L138 BoogieDeclarations]: Found implementation of procedure ASNull [2021-12-21 13:20:58,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 13:20:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-21 13:20:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 13:20:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure ASStart [2021-12-21 13:20:58,459 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStart [2021-12-21 13:20:58,459 INFO L130 BoogieDeclarations]: Found specification of procedure status_update [2021-12-21 13:20:58,460 INFO L138 BoogieDeclarations]: Found implementation of procedure status_update [2021-12-21 13:20:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure message_send [2021-12-21 13:20:58,460 INFO L138 BoogieDeclarations]: Found implementation of procedure message_send [2021-12-21 13:20:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-21 13:20:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure ASIdle [2021-12-21 13:20:58,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ASIdle [2021-12-21 13:20:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 13:20:58,460 INFO L130 BoogieDeclarations]: Found specification of procedure system_initialize [2021-12-21 13:20:58,461 INFO L138 BoogieDeclarations]: Found implementation of procedure system_initialize [2021-12-21 13:20:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 13:20:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure ASStop [2021-12-21 13:20:58,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ASStop [2021-12-21 13:20:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure strncpy [2021-12-21 13:20:58,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 13:20:58,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 13:20:58,618 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 13:20:58,620 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 13:20:59,202 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 13:20:59,208 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 13:20:59,208 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-21 13:20:59,210 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:20:59 BoogieIcfgContainer [2021-12-21 13:20:59,210 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 13:20:59,214 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 13:20:59,214 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 13:20:59,217 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 13:20:59,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 01:20:57" (1/3) ... [2021-12-21 13:20:59,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39341af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:20:59, skipping insertion in model container [2021-12-21 13:20:59,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 01:20:58" (2/3) ... [2021-12-21 13:20:59,218 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39341af9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 01:20:59, skipping insertion in model container [2021-12-21 13:20:59,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 01:20:59" (3/3) ... [2021-12-21 13:20:59,220 INFO L111 eAbstractionObserver]: Analyzing ICFG system-with-recursion.i [2021-12-21 13:20:59,224 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 13:20:59,225 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 13:20:59,271 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 13:20:59,277 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 [2021-12-21 13:20:59,277 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 13:20:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand has 132 states, 92 states have (on average 1.315217391304348) internal successors, (121), 93 states have internal predecessors, (121), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-21 13:20:59,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-21 13:20:59,304 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:20:59,304 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:20:59,305 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:20:59,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:20:59,309 INFO L85 PathProgramCache]: Analyzing trace with hash -965536278, now seen corresponding path program 1 times [2021-12-21 13:20:59,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:20:59,316 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649308876] [2021-12-21 13:20:59,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:20:59,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:20:59,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:20:59,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:20:59,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:20:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:20:59,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:20:59,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649308876] [2021-12-21 13:20:59,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1649308876] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:20:59,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:20:59,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:20:59,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125436254] [2021-12-21 13:20:59,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:20:59,788 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:20:59,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:20:59,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:20:59,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:20:59,828 INFO L87 Difference]: Start difference. First operand has 132 states, 92 states have (on average 1.315217391304348) internal successors, (121), 93 states have internal predecessors, (121), 29 states have call successors, (29), 9 states have call predecessors, (29), 9 states have return successors, (29), 29 states have call predecessors, (29), 29 states have call successors, (29) Second operand has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:21:00,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:00,783 INFO L93 Difference]: Finished difference Result 319 states and 468 transitions. [2021-12-21 13:21:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:21:00,785 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2021-12-21 13:21:00,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:00,793 INFO L225 Difference]: With dead ends: 319 [2021-12-21 13:21:00,793 INFO L226 Difference]: Without dead ends: 169 [2021-12-21 13:21:00,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-21 13:21:00,799 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 144 mSDsluCounter, 793 mSDsCounter, 0 mSdLazyCounter, 444 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 940 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 444 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:00,800 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 940 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 444 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 13:21:00,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-12-21 13:21:00,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 133. [2021-12-21 13:21:00,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 93 states have (on average 1.3225806451612903) internal successors, (123), 96 states have internal predecessors, (123), 30 states have call successors, (30), 10 states have call predecessors, (30), 9 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 13:21:00,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 179 transitions. [2021-12-21 13:21:00,839 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 179 transitions. Word has length 19 [2021-12-21 13:21:00,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:00,839 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 179 transitions. [2021-12-21 13:21:00,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.875) internal successors, (15), 6 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 13:21:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 179 transitions. [2021-12-21 13:21:00,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-21 13:21:00,842 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:00,842 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:21:00,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 13:21:00,843 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:00,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:00,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1463372220, now seen corresponding path program 1 times [2021-12-21 13:21:00,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:00,844 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044732107] [2021-12-21 13:21:00,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:00,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:00,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:00,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:00,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:00,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:00,994 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:00,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:00,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044732107] [2021-12-21 13:21:00,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044732107] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:00,998 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:00,998 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:21:00,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568062553] [2021-12-21 13:21:00,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:01,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:21:01,000 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:01,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:21:01,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:01,006 INFO L87 Difference]: Start difference. First operand 133 states and 179 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 13:21:01,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:01,355 INFO L93 Difference]: Finished difference Result 293 states and 423 transitions. [2021-12-21 13:21:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:21:01,355 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 35 [2021-12-21 13:21:01,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:01,357 INFO L225 Difference]: With dead ends: 293 [2021-12-21 13:21:01,357 INFO L226 Difference]: Without dead ends: 175 [2021-12-21 13:21:01,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:01,359 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 160 mSDsluCounter, 343 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 495 SdHoareTripleChecker+Invalid, 238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:01,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 495 Invalid, 238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:21:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-12-21 13:21:01,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 138. [2021-12-21 13:21:01,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 97 states have (on average 1.3298969072164948) internal successors, (129), 100 states have internal predecessors, (129), 30 states have call successors, (30), 11 states have call predecessors, (30), 10 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2021-12-21 13:21:01,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 185 transitions. [2021-12-21 13:21:01,376 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 185 transitions. Word has length 35 [2021-12-21 13:21:01,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:01,376 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 185 transitions. [2021-12-21 13:21:01,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 4 states have internal predecessors, (26), 2 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 13:21:01,376 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 185 transitions. [2021-12-21 13:21:01,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 13:21:01,378 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:01,378 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:21:01,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 13:21:01,379 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:01,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:01,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1541012852, now seen corresponding path program 1 times [2021-12-21 13:21:01,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:01,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545042494] [2021-12-21 13:21:01,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:01,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:01,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:01,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:01,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:01,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:01,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:01,497 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:01,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545042494] [2021-12-21 13:21:01,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545042494] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:01,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:01,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:01,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763914734] [2021-12-21 13:21:01,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:01,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:01,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:01,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:01,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:01,499 INFO L87 Difference]: Start difference. First operand 138 states and 185 transitions. Second operand has 10 states, 9 states have (on average 3.0) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 13:21:02,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:02,389 INFO L93 Difference]: Finished difference Result 339 states and 497 transitions. [2021-12-21 13:21:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 13:21:02,389 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2021-12-21 13:21:02,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:02,396 INFO L225 Difference]: With dead ends: 339 [2021-12-21 13:21:02,396 INFO L226 Difference]: Without dead ends: 216 [2021-12-21 13:21:02,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:02,400 INFO L933 BasicCegarLoop]: 171 mSDtfsCounter, 148 mSDsluCounter, 939 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 1110 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:02,403 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 1110 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 13:21:02,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-12-21 13:21:02,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 208. [2021-12-21 13:21:02,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 147 states have (on average 1.2789115646258504) internal successors, (188), 152 states have internal predecessors, (188), 40 states have call successors, (40), 13 states have call predecessors, (40), 20 states have return successors, (63), 42 states have call predecessors, (63), 36 states have call successors, (63) [2021-12-21 13:21:02,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 291 transitions. [2021-12-21 13:21:02,432 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 291 transitions. Word has length 36 [2021-12-21 13:21:02,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:02,433 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 291 transitions. [2021-12-21 13:21:02,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.0) internal successors, (27), 6 states have internal predecessors, (27), 3 states have call successors, (7), 5 states have call predecessors, (7), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 13:21:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 291 transitions. [2021-12-21 13:21:02,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 13:21:02,439 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:02,439 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:21:02,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 13:21:02,439 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:02,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1282847414, now seen corresponding path program 1 times [2021-12-21 13:21:02,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:02,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760974225] [2021-12-21 13:21:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:02,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:02,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:02,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:02,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:02,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:02,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:02,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760974225] [2021-12-21 13:21:02,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760974225] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:02,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524972378] [2021-12-21 13:21:02,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:02,705 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:02,705 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:02,706 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:02,735 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 13:21:02,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:02,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-21 13:21:02,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:02,983 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 13:21:03,048 INFO L353 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-21 13:21:03,048 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2021-12-21 13:21:03,093 INFO L353 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-21 13:21:03,095 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 10 [2021-12-21 13:21:03,124 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:03,125 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:04,010 WARN L838 $PredicateComparison]: unable to prove that (forall ((|system_initialize_~#e~1.base| Int)) (not (= ~sys_state_s~0~AS_IDLE (select (select (store |c_#memory_int| |system_initialize_~#e~1.base| (store (select |c_#memory_int| |system_initialize_~#e~1.base|) |c_system_initialize_~#e~1.offset| ~e_primitive_s~0~_EVENT_OPEN)) c_~user~0.base) c_~user~0.offset)))) is different from false [2021-12-21 13:21:04,838 WARN L838 $PredicateComparison]: unable to prove that (forall ((|system_initialize_~#e~1.base| Int)) (not (= (select (select (store |c_#memory_int| |system_initialize_~#e~1.base| (store (select |c_#memory_int| |system_initialize_~#e~1.base|) 0 ~e_primitive_s~0~_EVENT_OPEN)) c_~user~0.base) c_~user~0.offset) ~sys_state_s~0~AS_IDLE))) is different from false [2021-12-21 13:21:06,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:06,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524972378] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:06,967 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-12-21 13:21:06,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [13, 11] total 26 [2021-12-21 13:21:06,968 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880387004] [2021-12-21 13:21:06,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:06,968 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:06,968 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:06,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:06,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=453, Unknown=3, NotChecked=90, Total=650 [2021-12-21 13:21:06,969 INFO L87 Difference]: Start difference. First operand 208 states and 291 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 13:21:13,213 WARN L227 SmtUtils]: Spent 5.52s on a formula simplification that was a NOOP. DAG size: 25 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-12-21 13:21:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:13,315 INFO L93 Difference]: Finished difference Result 439 states and 658 transitions. [2021-12-21 13:21:13,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 13:21:13,315 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 36 [2021-12-21 13:21:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:13,317 INFO L225 Difference]: With dead ends: 439 [2021-12-21 13:21:13,317 INFO L226 Difference]: Without dead ends: 246 [2021-12-21 13:21:13,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=125, Invalid=635, Unknown=4, NotChecked=106, Total=870 [2021-12-21 13:21:13,319 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 35 mSDsluCounter, 855 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 1030 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:13,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 1030 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 68 Invalid, 0 Unknown, 184 Unchecked, 0.1s Time] [2021-12-21 13:21:13,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-12-21 13:21:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 237. [2021-12-21 13:21:13,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 169 states have (on average 1.2781065088757397) internal successors, (216), 172 states have internal predecessors, (216), 45 states have call successors, (45), 15 states have call predecessors, (45), 22 states have return successors, (83), 49 states have call predecessors, (83), 41 states have call successors, (83) [2021-12-21 13:21:13,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 344 transitions. [2021-12-21 13:21:13,339 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 344 transitions. Word has length 36 [2021-12-21 13:21:13,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:13,340 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 344 transitions. [2021-12-21 13:21:13,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-21 13:21:13,340 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 344 transitions. [2021-12-21 13:21:13,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-12-21 13:21:13,342 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:13,342 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-21 13:21:13,360 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:13,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:13,559 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:13,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:13,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2015047529, now seen corresponding path program 1 times [2021-12-21 13:21:13,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:13,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55437309] [2021-12-21 13:21:13,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:13,560 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:13,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:13,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:13,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:13,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:13,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:13,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:13,751 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55437309] [2021-12-21 13:21:13,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55437309] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:13,751 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:13,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:13,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176723475] [2021-12-21 13:21:13,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:13,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:13,752 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:13,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:13,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:13,753 INFO L87 Difference]: Start difference. First operand 237 states and 344 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:15,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:15,296 INFO L93 Difference]: Finished difference Result 624 states and 972 transitions. [2021-12-21 13:21:15,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-12-21 13:21:15,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 36 [2021-12-21 13:21:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:15,301 INFO L225 Difference]: With dead ends: 624 [2021-12-21 13:21:15,301 INFO L226 Difference]: Without dead ends: 400 [2021-12-21 13:21:15,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=487, Unknown=0, NotChecked=0, Total=650 [2021-12-21 13:21:15,303 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 292 mSDsluCounter, 883 mSDsCounter, 0 mSdLazyCounter, 997 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 997 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:15,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 1090 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 997 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-12-21 13:21:15,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2021-12-21 13:21:15,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 367. [2021-12-21 13:21:15,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 265 states have (on average 1.260377358490566) internal successors, (334), 264 states have internal predecessors, (334), 60 states have call successors, (60), 22 states have call predecessors, (60), 41 states have return successors, (155), 80 states have call predecessors, (155), 56 states have call successors, (155) [2021-12-21 13:21:15,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 549 transitions. [2021-12-21 13:21:15,337 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 549 transitions. Word has length 36 [2021-12-21 13:21:15,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:15,338 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 549 transitions. [2021-12-21 13:21:15,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (7), 5 states have call predecessors, (7), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 549 transitions. [2021-12-21 13:21:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 13:21:15,340 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:15,340 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2021-12-21 13:21:15,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-21 13:21:15,341 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:15,341 INFO L85 PathProgramCache]: Analyzing trace with hash 2005278688, now seen corresponding path program 1 times [2021-12-21 13:21:15,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:15,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803606702] [2021-12-21 13:21:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:15,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:15,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:15,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-21 13:21:15,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:15,499 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 13:21:15,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:15,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803606702] [2021-12-21 13:21:15,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803606702] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:15,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:15,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:21:15,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876875547] [2021-12-21 13:21:15,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:15,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:21:15,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:15,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:21:15,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:21:15,501 INFO L87 Difference]: Start difference. First operand 367 states and 549 transitions. Second operand has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:16,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:16,044 INFO L93 Difference]: Finished difference Result 743 states and 1107 transitions. [2021-12-21 13:21:16,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:21:16,045 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2021-12-21 13:21:16,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:16,047 INFO L225 Difference]: With dead ends: 743 [2021-12-21 13:21:16,047 INFO L226 Difference]: Without dead ends: 386 [2021-12-21 13:21:16,049 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:21:16,049 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 108 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 808 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:16,050 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 808 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-12-21 13:21:16,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 386 states. [2021-12-21 13:21:16,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 386 to 370. [2021-12-21 13:21:16,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 268 states have (on average 1.257462686567164) internal successors, (337), 266 states have internal predecessors, (337), 60 states have call successors, (60), 23 states have call predecessors, (60), 41 states have return successors, (155), 80 states have call predecessors, (155), 56 states have call successors, (155) [2021-12-21 13:21:16,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 552 transitions. [2021-12-21 13:21:16,065 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 552 transitions. Word has length 38 [2021-12-21 13:21:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:16,065 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 552 transitions. [2021-12-21 13:21:16,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.857142857142857) internal successors, (27), 5 states have internal predecessors, (27), 4 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 552 transitions. [2021-12-21 13:21:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-12-21 13:21:16,066 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:16,066 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] [2021-12-21 13:21:16,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-21 13:21:16,067 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:16,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:16,067 INFO L85 PathProgramCache]: Analyzing trace with hash -773790690, now seen corresponding path program 1 times [2021-12-21 13:21:16,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:16,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319604654] [2021-12-21 13:21:16,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:16,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:16,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:16,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2021-12-21 13:21:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:16,215 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:16,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:16,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319604654] [2021-12-21 13:21:16,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319604654] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:16,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:16,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:16,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165807796] [2021-12-21 13:21:16,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:16,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:16,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:16,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:16,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:16,218 INFO L87 Difference]: Start difference. First operand 370 states and 552 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:16,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:16,917 INFO L93 Difference]: Finished difference Result 762 states and 1129 transitions. [2021-12-21 13:21:16,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 13:21:16,918 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 38 [2021-12-21 13:21:16,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:16,920 INFO L225 Difference]: With dead ends: 762 [2021-12-21 13:21:16,920 INFO L226 Difference]: Without dead ends: 390 [2021-12-21 13:21:16,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:16,922 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 228 mSDsluCounter, 833 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 987 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:16,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 987 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 13:21:16,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2021-12-21 13:21:16,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 375. [2021-12-21 13:21:16,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 271 states have (on average 1.2546125461254614) internal successors, (340), 269 states have internal predecessors, (340), 62 states have call successors, (62), 24 states have call predecessors, (62), 41 states have return successors, (156), 81 states have call predecessors, (156), 57 states have call successors, (156) [2021-12-21 13:21:16,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 558 transitions. [2021-12-21 13:21:16,936 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 558 transitions. Word has length 38 [2021-12-21 13:21:16,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:16,936 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 558 transitions. [2021-12-21 13:21:16,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 6 states have internal predecessors, (30), 4 states have call successors, (6), 5 states have call predecessors, (6), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:16,936 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 558 transitions. [2021-12-21 13:21:16,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-21 13:21:16,937 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:16,937 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, 1] [2021-12-21 13:21:16,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-21 13:21:16,938 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:16,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:16,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1418952031, now seen corresponding path program 1 times [2021-12-21 13:21:16,938 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:16,938 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602957565] [2021-12-21 13:21:16,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:16,939 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:16,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:17,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:17,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:17,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-21 13:21:17,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 13:21:17,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:17,065 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602957565] [2021-12-21 13:21:17,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602957565] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:17,065 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:17,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:17,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363472411] [2021-12-21 13:21:17,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:17,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:17,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:17,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:17,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:17,066 INFO L87 Difference]: Start difference. First operand 375 states and 558 transitions. Second operand has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:17,739 INFO L93 Difference]: Finished difference Result 754 states and 1117 transitions. [2021-12-21 13:21:17,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-21 13:21:17,739 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2021-12-21 13:21:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:17,741 INFO L225 Difference]: With dead ends: 754 [2021-12-21 13:21:17,741 INFO L226 Difference]: Without dead ends: 385 [2021-12-21 13:21:17,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:17,743 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 354 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 378 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 378 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:17,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [363 Valid, 620 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 378 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 13:21:17,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2021-12-21 13:21:17,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 367. [2021-12-21 13:21:17,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 266 states have (on average 1.2518796992481203) internal successors, (333), 262 states have internal predecessors, (333), 59 states have call successors, (59), 24 states have call predecessors, (59), 41 states have return successors, (156), 80 states have call predecessors, (156), 57 states have call successors, (156) [2021-12-21 13:21:17,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 548 transitions. [2021-12-21 13:21:17,760 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 548 transitions. Word has length 39 [2021-12-21 13:21:17,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:17,761 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 548 transitions. [2021-12-21 13:21:17,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 7 states have internal predecessors, (30), 3 states have call successors, (7), 4 states have call predecessors, (7), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 13:21:17,761 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 548 transitions. [2021-12-21 13:21:17,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-12-21 13:21:17,762 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:17,762 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1] [2021-12-21 13:21:17,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-12-21 13:21:17,762 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:17,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:17,763 INFO L85 PathProgramCache]: Analyzing trace with hash -1936715933, now seen corresponding path program 1 times [2021-12-21 13:21:17,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:17,763 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139778898] [2021-12-21 13:21:17,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:17,763 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:17,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:17,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:17,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:17,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 13:21:17,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:17,860 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:21:17,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:17,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139778898] [2021-12-21 13:21:17,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139778898] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:17,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:17,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-21 13:21:17,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167273596] [2021-12-21 13:21:17,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:17,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-21 13:21:17,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:17,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-21 13:21:17,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-21 13:21:17,862 INFO L87 Difference]: Start difference. First operand 367 states and 548 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:21:18,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:18,157 INFO L93 Difference]: Finished difference Result 744 states and 1229 transitions. [2021-12-21 13:21:18,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:21:18,158 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2021-12-21 13:21:18,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:18,160 INFO L225 Difference]: With dead ends: 744 [2021-12-21 13:21:18,175 INFO L226 Difference]: Without dead ends: 392 [2021-12-21 13:21:18,177 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:18,179 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 169 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 476 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:18,180 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 476 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:21:18,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2021-12-21 13:21:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 379. [2021-12-21 13:21:18,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 275 states have (on average 1.2581818181818183) internal successors, (346), 272 states have internal predecessors, (346), 59 states have call successors, (59), 26 states have call predecessors, (59), 44 states have return successors, (156), 80 states have call predecessors, (156), 57 states have call successors, (156) [2021-12-21 13:21:18,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 561 transitions. [2021-12-21 13:21:18,200 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 561 transitions. Word has length 53 [2021-12-21 13:21:18,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:18,201 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 561 transitions. [2021-12-21 13:21:18,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (10), 4 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:21:18,202 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 561 transitions. [2021-12-21 13:21:18,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 13:21:18,203 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:18,203 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 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, 1, 1] [2021-12-21 13:21:18,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-21 13:21:18,203 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:18,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:18,204 INFO L85 PathProgramCache]: Analyzing trace with hash -821329833, now seen corresponding path program 1 times [2021-12-21 13:21:18,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:18,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288570059] [2021-12-21 13:21:18,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:18,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:18,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:18,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:18,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:18,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 13:21:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:21:18,362 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:18,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288570059] [2021-12-21 13:21:18,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288570059] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:18,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:18,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:21:18,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927900108] [2021-12-21 13:21:18,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:18,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:18,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:18,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:18,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:18,363 INFO L87 Difference]: Start difference. First operand 379 states and 561 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:21:19,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:19,112 INFO L93 Difference]: Finished difference Result 891 states and 1443 transitions. [2021-12-21 13:21:19,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-21 13:21:19,113 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 54 [2021-12-21 13:21:19,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:19,115 INFO L225 Difference]: With dead ends: 891 [2021-12-21 13:21:19,116 INFO L226 Difference]: Without dead ends: 527 [2021-12-21 13:21:19,117 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2021-12-21 13:21:19,118 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 254 mSDsluCounter, 908 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 1131 SdHoareTripleChecker+Invalid, 660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:19,118 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 1131 Invalid, 660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 13:21:19,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2021-12-21 13:21:19,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 488. [2021-12-21 13:21:19,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 359 states have (on average 1.2367688022284122) internal successors, (444), 349 states have internal predecessors, (444), 67 states have call successors, (67), 30 states have call predecessors, (67), 61 states have return successors, (223), 108 states have call predecessors, (223), 65 states have call successors, (223) [2021-12-21 13:21:19,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 734 transitions. [2021-12-21 13:21:19,137 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 734 transitions. Word has length 54 [2021-12-21 13:21:19,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:19,137 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 734 transitions. [2021-12-21 13:21:19,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 7 states have internal predecessors, (39), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:21:19,137 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 734 transitions. [2021-12-21 13:21:19,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-12-21 13:21:19,138 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:19,138 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1] [2021-12-21 13:21:19,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-12-21 13:21:19,139 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:19,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:19,139 INFO L85 PathProgramCache]: Analyzing trace with hash 686221976, now seen corresponding path program 1 times [2021-12-21 13:21:19,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:19,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431992277] [2021-12-21 13:21:19,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:19,140 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:19,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:19,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:19,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:19,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 13:21:19,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:19,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-12-21 13:21:19,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:19,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431992277] [2021-12-21 13:21:19,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431992277] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:19,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:19,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:19,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688685606] [2021-12-21 13:21:19,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:19,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:19,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:19,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:19,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:19,257 INFO L87 Difference]: Start difference. First operand 488 states and 734 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 13:21:20,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:20,539 INFO L93 Difference]: Finished difference Result 1109 states and 1933 transitions. [2021-12-21 13:21:20,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-21 13:21:20,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 54 [2021-12-21 13:21:20,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:20,544 INFO L225 Difference]: With dead ends: 1109 [2021-12-21 13:21:20,544 INFO L226 Difference]: Without dead ends: 632 [2021-12-21 13:21:20,572 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=445, Unknown=0, NotChecked=0, Total=600 [2021-12-21 13:21:20,573 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 336 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:20,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 903 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 13:21:20,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2021-12-21 13:21:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 585. [2021-12-21 13:21:20,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 585 states, 437 states have (on average 1.240274599542334) internal successors, (542), 419 states have internal predecessors, (542), 73 states have call successors, (73), 36 states have call predecessors, (73), 74 states have return successors, (319), 129 states have call predecessors, (319), 71 states have call successors, (319) [2021-12-21 13:21:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 934 transitions. [2021-12-21 13:21:20,624 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 934 transitions. Word has length 54 [2021-12-21 13:21:20,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:20,624 INFO L470 AbstractCegarLoop]: Abstraction has 585 states and 934 transitions. [2021-12-21 13:21:20,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 8 states have internal predecessors, (41), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 13:21:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 934 transitions. [2021-12-21 13:21:20,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 13:21:20,625 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:20,625 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:20,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-12-21 13:21:20,634 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:20,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2020535424, now seen corresponding path program 1 times [2021-12-21 13:21:20,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:20,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063548677] [2021-12-21 13:21:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:20,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:20,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:20,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:20,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:20,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:20,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:20,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:20,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:21:20,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:20,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063548677] [2021-12-21 13:21:20,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063548677] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:20,910 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:20,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:20,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911310091] [2021-12-21 13:21:20,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:20,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:20,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:20,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:20,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:20,912 INFO L87 Difference]: Start difference. First operand 585 states and 934 transitions. Second operand has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:21:22,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:22,110 INFO L93 Difference]: Finished difference Result 1233 states and 2204 transitions. [2021-12-21 13:21:22,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 13:21:22,111 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2021-12-21 13:21:22,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:22,114 INFO L225 Difference]: With dead ends: 1233 [2021-12-21 13:21:22,115 INFO L226 Difference]: Without dead ends: 666 [2021-12-21 13:21:22,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:22,118 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 124 mSDsluCounter, 1004 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 1192 SdHoareTripleChecker+Invalid, 555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:22,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 1192 Invalid, 555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-12-21 13:21:22,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2021-12-21 13:21:22,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 641. [2021-12-21 13:21:22,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 641 states, 479 states have (on average 1.2359081419624216) internal successors, (592), 462 states have internal predecessors, (592), 79 states have call successors, (79), 38 states have call predecessors, (79), 82 states have return successors, (351), 140 states have call predecessors, (351), 77 states have call successors, (351) [2021-12-21 13:21:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 641 states to 641 states and 1022 transitions. [2021-12-21 13:21:22,145 INFO L78 Accepts]: Start accepts. Automaton has 641 states and 1022 transitions. Word has length 55 [2021-12-21 13:21:22,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:22,146 INFO L470 AbstractCegarLoop]: Abstraction has 641 states and 1022 transitions. [2021-12-21 13:21:22,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.111111111111111) internal successors, (37), 6 states have internal predecessors, (37), 3 states have call successors, (11), 5 states have call predecessors, (11), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:21:22,146 INFO L276 IsEmpty]: Start isEmpty. Operand 641 states and 1022 transitions. [2021-12-21 13:21:22,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 13:21:22,147 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:22,147 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:22,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-12-21 13:21:22,148 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:22,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:22,148 INFO L85 PathProgramCache]: Analyzing trace with hash -758533954, now seen corresponding path program 1 times [2021-12-21 13:21:22,148 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:22,148 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3915716] [2021-12-21 13:21:22,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:22,149 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:22,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:22,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:22,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:22,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:22,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 13:21:22,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:22,253 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:21:22,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:22,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3915716] [2021-12-21 13:21:22,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3915716] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:22,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:22,254 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:21:22,254 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315968436] [2021-12-21 13:21:22,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:22,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:22,254 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:22,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:22,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:22,255 INFO L87 Difference]: Start difference. First operand 641 states and 1022 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:21:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:23,025 INFO L93 Difference]: Finished difference Result 1619 states and 2966 transitions. [2021-12-21 13:21:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-21 13:21:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2021-12-21 13:21:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:23,032 INFO L225 Difference]: With dead ends: 1619 [2021-12-21 13:21:23,032 INFO L226 Difference]: Without dead ends: 996 [2021-12-21 13:21:23,035 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-12-21 13:21:23,036 INFO L933 BasicCegarLoop]: 218 mSDtfsCounter, 283 mSDsluCounter, 923 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 1141 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:23,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 1141 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 13:21:23,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-12-21 13:21:23,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 959. [2021-12-21 13:21:23,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 723 states have (on average 1.2005532503457814) internal successors, (868), 682 states have internal predecessors, (868), 100 states have call successors, (100), 53 states have call predecessors, (100), 135 states have return successors, (631), 223 states have call predecessors, (631), 98 states have call successors, (631) [2021-12-21 13:21:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1599 transitions. [2021-12-21 13:21:23,076 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1599 transitions. Word has length 55 [2021-12-21 13:21:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:23,076 INFO L470 AbstractCegarLoop]: Abstraction has 959 states and 1599 transitions. [2021-12-21 13:21:23,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 7 states have internal predecessors, (40), 3 states have call successors, (10), 5 states have call predecessors, (10), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 13:21:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1599 transitions. [2021-12-21 13:21:23,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-12-21 13:21:23,077 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:23,078 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:23,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-12-21 13:21:23,078 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:23,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:23,078 INFO L85 PathProgramCache]: Analyzing trace with hash 47417981, now seen corresponding path program 1 times [2021-12-21 13:21:23,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:23,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995522269] [2021-12-21 13:21:23,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:23,079 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:23,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:23,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:23,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:23,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2021-12-21 13:21:23,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:23,161 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:23,161 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:23,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995522269] [2021-12-21 13:21:23,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995522269] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:23,162 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:23,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:23,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677388384] [2021-12-21 13:21:23,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:23,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:23,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:23,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:23,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:23,163 INFO L87 Difference]: Start difference. First operand 959 states and 1599 transitions. Second operand has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 13:21:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:23,902 INFO L93 Difference]: Finished difference Result 2005 states and 3867 transitions. [2021-12-21 13:21:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:21:23,902 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2021-12-21 13:21:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:23,908 INFO L225 Difference]: With dead ends: 2005 [2021-12-21 13:21:23,908 INFO L226 Difference]: Without dead ends: 1064 [2021-12-21 13:21:23,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:21:23,914 INFO L933 BasicCegarLoop]: 158 mSDtfsCounter, 283 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 998 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:23,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 998 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 13:21:23,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2021-12-21 13:21:23,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1011. [2021-12-21 13:21:23,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1011 states, 760 states have (on average 1.1921052631578948) internal successors, (906), 723 states have internal predecessors, (906), 105 states have call successors, (105), 55 states have call predecessors, (105), 145 states have return successors, (640), 232 states have call predecessors, (640), 103 states have call successors, (640) [2021-12-21 13:21:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1011 states to 1011 states and 1651 transitions. [2021-12-21 13:21:23,955 INFO L78 Accepts]: Start accepts. Automaton has 1011 states and 1651 transitions. Word has length 55 [2021-12-21 13:21:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:23,955 INFO L470 AbstractCegarLoop]: Abstraction has 1011 states and 1651 transitions. [2021-12-21 13:21:23,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.333333333333333) internal successors, (39), 6 states have internal predecessors, (39), 4 states have call successors, (10), 6 states have call predecessors, (10), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 13:21:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1011 states and 1651 transitions. [2021-12-21 13:21:23,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-21 13:21:23,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:23,957 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:23,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-12-21 13:21:23,957 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:23,957 INFO L85 PathProgramCache]: Analyzing trace with hash 2077142114, now seen corresponding path program 1 times [2021-12-21 13:21:23,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:23,957 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850218509] [2021-12-21 13:21:23,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:23,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2021-12-21 13:21:24,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,091 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-12-21 13:21:24,091 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:24,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850218509] [2021-12-21 13:21:24,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850218509] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:24,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:24,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:21:24,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529734068] [2021-12-21 13:21:24,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:24,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:24,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:24,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:24,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:24,093 INFO L87 Difference]: Start difference. First operand 1011 states and 1651 transitions. Second operand has 9 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (11), 6 states have call predecessors, (11), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 13:21:24,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:24,790 INFO L93 Difference]: Finished difference Result 2001 states and 3742 transitions. [2021-12-21 13:21:24,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:21:24,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (11), 6 states have call predecessors, (11), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2021-12-21 13:21:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:24,796 INFO L225 Difference]: With dead ends: 2001 [2021-12-21 13:21:24,796 INFO L226 Difference]: Without dead ends: 1008 [2021-12-21 13:21:24,802 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:21:24,803 INFO L933 BasicCegarLoop]: 152 mSDtfsCounter, 231 mSDsluCounter, 668 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 481 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:24,803 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [231 Valid, 820 Invalid, 481 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 13:21:24,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-12-21 13:21:24,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 984. [2021-12-21 13:21:24,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 744 states have (on average 1.1935483870967742) internal successors, (888), 706 states have internal predecessors, (888), 100 states have call successors, (100), 55 states have call predecessors, (100), 139 states have return successors, (603), 222 states have call predecessors, (603), 98 states have call successors, (603) [2021-12-21 13:21:24,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1591 transitions. [2021-12-21 13:21:24,859 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1591 transitions. Word has length 56 [2021-12-21 13:21:24,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:24,859 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 1591 transitions. [2021-12-21 13:21:24,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.875) internal successors, (39), 5 states have internal predecessors, (39), 4 states have call successors, (11), 6 states have call predecessors, (11), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-21 13:21:24,860 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1591 transitions. [2021-12-21 13:21:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 13:21:24,863 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:24,863 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:24,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-12-21 13:21:24,863 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:24,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:24,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1561977805, now seen corresponding path program 1 times [2021-12-21 13:21:24,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:24,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701942017] [2021-12-21 13:21:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:24,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 13:21:24,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:24,959 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:21:24,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:24,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701942017] [2021-12-21 13:21:24,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701942017] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:24,959 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:24,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:21:24,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360516324] [2021-12-21 13:21:24,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:24,960 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:21:24,960 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:24,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:21:24,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:21:24,961 INFO L87 Difference]: Start difference. First operand 984 states and 1591 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 13:21:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:25,364 INFO L93 Difference]: Finished difference Result 1996 states and 3804 transitions. [2021-12-21 13:21:25,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:21:25,365 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 59 [2021-12-21 13:21:25,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:25,371 INFO L225 Difference]: With dead ends: 1996 [2021-12-21 13:21:25,371 INFO L226 Difference]: Without dead ends: 1030 [2021-12-21 13:21:25,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:21:25,376 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 137 mSDsluCounter, 530 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 681 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:25,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 681 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 13:21:25,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-12-21 13:21:25,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 988. [2021-12-21 13:21:25,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 988 states, 747 states have (on average 1.1927710843373494) internal successors, (891), 709 states have internal predecessors, (891), 100 states have call successors, (100), 55 states have call predecessors, (100), 140 states have return successors, (606), 223 states have call predecessors, (606), 98 states have call successors, (606) [2021-12-21 13:21:25,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1597 transitions. [2021-12-21 13:21:25,434 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1597 transitions. Word has length 59 [2021-12-21 13:21:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:25,435 INFO L470 AbstractCegarLoop]: Abstraction has 988 states and 1597 transitions. [2021-12-21 13:21:25,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 4 states have internal predecessors, (40), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 13:21:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1597 transitions. [2021-12-21 13:21:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 13:21:25,436 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:25,436 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:25,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-12-21 13:21:25,436 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:25,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:25,437 INFO L85 PathProgramCache]: Analyzing trace with hash -1151067067, now seen corresponding path program 1 times [2021-12-21 13:21:25,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:25,437 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833588147] [2021-12-21 13:21:25,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:25,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:25,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:25,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:25,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:25,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:25,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:25,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:25,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 13:21:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:25,543 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 13:21:25,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:25,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833588147] [2021-12-21 13:21:25,544 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833588147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:25,544 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:25,544 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:25,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970133325] [2021-12-21 13:21:25,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:25,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:25,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:25,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:25,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:25,545 INFO L87 Difference]: Start difference. First operand 988 states and 1597 transitions. Second operand has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:26,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:26,548 INFO L93 Difference]: Finished difference Result 2039 states and 3919 transitions. [2021-12-21 13:21:26,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:21:26,549 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2021-12-21 13:21:26,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:26,555 INFO L225 Difference]: With dead ends: 2039 [2021-12-21 13:21:26,555 INFO L226 Difference]: Without dead ends: 1069 [2021-12-21 13:21:26,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:21:26,561 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 182 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:26,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 846 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 13:21:26,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-12-21 13:21:26,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 954. [2021-12-21 13:21:26,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 722 states have (on average 1.1994459833795015) internal successors, (866), 693 states have internal predecessors, (866), 101 states have call successors, (101), 56 states have call predecessors, (101), 130 states have return successors, (573), 204 states have call predecessors, (573), 99 states have call successors, (573) [2021-12-21 13:21:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1540 transitions. [2021-12-21 13:21:26,600 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1540 transitions. Word has length 60 [2021-12-21 13:21:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:26,600 INFO L470 AbstractCegarLoop]: Abstraction has 954 states and 1540 transitions. [2021-12-21 13:21:26,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.777777777777778) internal successors, (43), 5 states have internal predecessors, (43), 4 states have call successors, (11), 7 states have call predecessors, (11), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:26,600 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1540 transitions. [2021-12-21 13:21:26,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-12-21 13:21:26,601 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:26,602 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:26,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-12-21 13:21:26,602 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:26,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:26,602 INFO L85 PathProgramCache]: Analyzing trace with hash -756700281, now seen corresponding path program 1 times [2021-12-21 13:21:26,602 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:26,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84313591] [2021-12-21 13:21:26,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:26,603 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:26,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:26,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:26,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:26,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:26,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:26,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 13:21:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:21:26,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:26,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84313591] [2021-12-21 13:21:26,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [84313591] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:26,741 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:26,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-12-21 13:21:26,742 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604718486] [2021-12-21 13:21:26,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:26,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-21 13:21:26,742 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:26,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-21 13:21:26,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:21:26,743 INFO L87 Difference]: Start difference. First operand 954 states and 1540 transitions. Second operand has 8 states, 8 states have (on average 5.125) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 13:21:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:27,149 INFO L93 Difference]: Finished difference Result 1920 states and 3608 transitions. [2021-12-21 13:21:27,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 13:21:27,150 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 60 [2021-12-21 13:21:27,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:27,156 INFO L225 Difference]: With dead ends: 1920 [2021-12-21 13:21:27,156 INFO L226 Difference]: Without dead ends: 984 [2021-12-21 13:21:27,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-12-21 13:21:27,165 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 201 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:27,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 616 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-21 13:21:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2021-12-21 13:21:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 956. [2021-12-21 13:21:27,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 956 states, 724 states have (on average 1.1988950276243093) internal successors, (868), 694 states have internal predecessors, (868), 101 states have call successors, (101), 56 states have call predecessors, (101), 130 states have return successors, (573), 205 states have call predecessors, (573), 99 states have call successors, (573) [2021-12-21 13:21:27,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 956 states to 956 states and 1542 transitions. [2021-12-21 13:21:27,259 INFO L78 Accepts]: Start accepts. Automaton has 956 states and 1542 transitions. Word has length 60 [2021-12-21 13:21:27,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:27,259 INFO L470 AbstractCegarLoop]: Abstraction has 956 states and 1542 transitions. [2021-12-21 13:21:27,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.125) internal successors, (41), 4 states have internal predecessors, (41), 2 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-21 13:21:27,259 INFO L276 IsEmpty]: Start isEmpty. Operand 956 states and 1542 transitions. [2021-12-21 13:21:27,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-12-21 13:21:27,261 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:27,261 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:27,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-12-21 13:21:27,261 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:27,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:27,261 INFO L85 PathProgramCache]: Analyzing trace with hash 682002064, now seen corresponding path program 1 times [2021-12-21 13:21:27,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:27,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268254889] [2021-12-21 13:21:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:27,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:27,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:27,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:27,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:27,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:27,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:27,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 13:21:27,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:27,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 13:21:27,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:27,369 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-21 13:21:27,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:27,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268254889] [2021-12-21 13:21:27,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268254889] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:27,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:27,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:27,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225888990] [2021-12-21 13:21:27,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:27,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:27,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:27,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:27,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:27,371 INFO L87 Difference]: Start difference. First operand 956 states and 1542 transitions. Second operand has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 13:21:28,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:28,300 INFO L93 Difference]: Finished difference Result 2007 states and 3938 transitions. [2021-12-21 13:21:28,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:21:28,300 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 65 [2021-12-21 13:21:28,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:28,307 INFO L225 Difference]: With dead ends: 2007 [2021-12-21 13:21:28,307 INFO L226 Difference]: Without dead ends: 1069 [2021-12-21 13:21:28,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:21:28,310 INFO L933 BasicCegarLoop]: 174 mSDtfsCounter, 110 mSDsluCounter, 724 mSDsCounter, 0 mSdLazyCounter, 486 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 898 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:28,310 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 898 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 486 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 13:21:28,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1069 states. [2021-12-21 13:21:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1069 to 1035. [2021-12-21 13:21:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1035 states, 784 states have (on average 1.2066326530612246) internal successors, (946), 759 states have internal predecessors, (946), 115 states have call successors, (115), 62 states have call predecessors, (115), 135 states have return successors, (690), 213 states have call predecessors, (690), 113 states have call successors, (690) [2021-12-21 13:21:28,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1035 states to 1035 states and 1751 transitions. [2021-12-21 13:21:28,357 INFO L78 Accepts]: Start accepts. Automaton has 1035 states and 1751 transitions. Word has length 65 [2021-12-21 13:21:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:28,357 INFO L470 AbstractCegarLoop]: Abstraction has 1035 states and 1751 transitions. [2021-12-21 13:21:28,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 4.666666666666667) internal successors, (42), 5 states have internal predecessors, (42), 3 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 13:21:28,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1035 states and 1751 transitions. [2021-12-21 13:21:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 13:21:28,359 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:28,359 INFO L514 BasicCegarLoop]: trace histogram [4, 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, 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] [2021-12-21 13:21:28,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-12-21 13:21:28,359 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:28,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:28,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1397073829, now seen corresponding path program 1 times [2021-12-21 13:21:28,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:28,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007205103] [2021-12-21 13:21:28,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:28,360 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:28,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:28,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:28,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:28,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:28,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:28,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:28,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 13:21:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:28,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:21:28,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:28,563 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:21:28,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007205103] [2021-12-21 13:21:28,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007205103] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:28,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749210982] [2021-12-21 13:21:28,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:28,564 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:28,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:28,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:28,566 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 13:21:28,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:28,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-21 13:21:28,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:28,995 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 13:21:29,056 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:21:29,056 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:29,134 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-21 13:21:29,156 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-21 13:21:29,192 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-21 13:21:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:21:29,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749210982] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:29,245 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:29,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 13 [2021-12-21 13:21:29,245 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76036628] [2021-12-21 13:21:29,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:29,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 13:21:29,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:29,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 13:21:29,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:21:29,247 INFO L87 Difference]: Start difference. First operand 1035 states and 1751 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 13:21:30,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:30,177 INFO L93 Difference]: Finished difference Result 2268 states and 4455 transitions. [2021-12-21 13:21:30,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-21 13:21:30,178 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) Word has length 67 [2021-12-21 13:21:30,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:30,187 INFO L225 Difference]: With dead ends: 2268 [2021-12-21 13:21:30,187 INFO L226 Difference]: Without dead ends: 1251 [2021-12-21 13:21:30,192 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:21:30,193 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 193 mSDsluCounter, 860 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 1035 SdHoareTripleChecker+Invalid, 608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:30,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 1035 Invalid, 608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-12-21 13:21:30,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-12-21 13:21:30,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1209. [2021-12-21 13:21:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1209 states, 918 states have (on average 1.1808278867102397) internal successors, (1084), 874 states have internal predecessors, (1084), 121 states have call successors, (121), 64 states have call predecessors, (121), 169 states have return successors, (892), 270 states have call predecessors, (892), 119 states have call successors, (892) [2021-12-21 13:21:30,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1209 states to 1209 states and 2097 transitions. [2021-12-21 13:21:30,271 INFO L78 Accepts]: Start accepts. Automaton has 1209 states and 2097 transitions. Word has length 67 [2021-12-21 13:21:30,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:30,272 INFO L470 AbstractCegarLoop]: Abstraction has 1209 states and 2097 transitions. [2021-12-21 13:21:30,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 10 states have internal predecessors, (63), 4 states have call successors, (18), 7 states have call predecessors, (18), 3 states have return successors, (7), 3 states have call predecessors, (7), 1 states have call successors, (7) [2021-12-21 13:21:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1209 states and 2097 transitions. [2021-12-21 13:21:30,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-12-21 13:21:30,274 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:30,274 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:30,302 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:30,487 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-12-21 13:21:30,487 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:30,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:30,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1020751739, now seen corresponding path program 1 times [2021-12-21 13:21:30,488 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:30,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994947572] [2021-12-21 13:21:30,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:30,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:30,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:30,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:30,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 13:21:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2021-12-21 13:21:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:30,658 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 13:21:30,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:30,659 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994947572] [2021-12-21 13:21:30,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994947572] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:30,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:30,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 13:21:30,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143309406] [2021-12-21 13:21:30,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:30,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 13:21:30,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:30,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 13:21:30,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:21:30,662 INFO L87 Difference]: Start difference. First operand 1209 states and 2097 transitions. Second operand has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 13:21:31,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:31,452 INFO L93 Difference]: Finished difference Result 2504 states and 5137 transitions. [2021-12-21 13:21:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-21 13:21:31,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 67 [2021-12-21 13:21:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:31,478 INFO L225 Difference]: With dead ends: 2504 [2021-12-21 13:21:31,478 INFO L226 Difference]: Without dead ends: 1313 [2021-12-21 13:21:31,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:31,484 INFO L933 BasicCegarLoop]: 185 mSDtfsCounter, 183 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 1146 SdHoareTripleChecker+Invalid, 654 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:31,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [185 Valid, 1146 Invalid, 654 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 13:21:31,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-12-21 13:21:31,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 1303. [2021-12-21 13:21:31,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 988 states have (on average 1.1751012145748987) internal successors, (1161), 946 states have internal predecessors, (1161), 128 states have call successors, (128), 66 states have call predecessors, (128), 186 states have return successors, (998), 290 states have call predecessors, (998), 126 states have call successors, (998) [2021-12-21 13:21:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 2287 transitions. [2021-12-21 13:21:31,623 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 2287 transitions. Word has length 67 [2021-12-21 13:21:31,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:31,624 INFO L470 AbstractCegarLoop]: Abstraction has 1303 states and 2287 transitions. [2021-12-21 13:21:31,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 4.2) internal successors, (42), 6 states have internal predecessors, (42), 3 states have call successors, (12), 6 states have call predecessors, (12), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-12-21 13:21:31,624 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 2287 transitions. [2021-12-21 13:21:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 13:21:31,629 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:31,630 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:31,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-12-21 13:21:31,630 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:31,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:31,630 INFO L85 PathProgramCache]: Analyzing trace with hash -279030099, now seen corresponding path program 1 times [2021-12-21 13:21:31,631 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:31,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660873395] [2021-12-21 13:21:31,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:31,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:31,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:31,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:31,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:31,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-21 13:21:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:31,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2021-12-21 13:21:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:31,798 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 36 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:21:31,799 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:31,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660873395] [2021-12-21 13:21:31,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660873395] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:31,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609660631] [2021-12-21 13:21:31,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:31,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:31,799 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:31,801 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:31,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 13:21:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:32,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 591 conjuncts, 22 conjunts are in the unsatisfiable core [2021-12-21 13:21:32,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:32,155 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-21 13:21:32,199 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-21 13:21:32,270 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 13:21:32,302 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-21 13:21:32,302 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:21:32,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609660631] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:32,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:21:32,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 16 [2021-12-21 13:21:32,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169649572] [2021-12-21 13:21:32,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:32,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:32,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:32,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:32,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:32,304 INFO L87 Difference]: Start difference. First operand 1303 states and 2287 transitions. Second operand has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:32,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:32,981 INFO L93 Difference]: Finished difference Result 2615 states and 5374 transitions. [2021-12-21 13:21:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:21:32,981 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2021-12-21 13:21:32,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:33,007 INFO L225 Difference]: With dead ends: 2615 [2021-12-21 13:21:33,007 INFO L226 Difference]: Without dead ends: 1326 [2021-12-21 13:21:33,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2021-12-21 13:21:33,014 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 164 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 374 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:33,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 728 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 374 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-21 13:21:33,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-12-21 13:21:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 1299. [2021-12-21 13:21:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 984 states have (on average 1.1758130081300813) internal successors, (1157), 945 states have internal predecessors, (1157), 129 states have call successors, (129), 68 states have call predecessors, (129), 185 states have return successors, (973), 285 states have call predecessors, (973), 127 states have call successors, (973) [2021-12-21 13:21:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 2259 transitions. [2021-12-21 13:21:33,089 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 2259 transitions. Word has length 74 [2021-12-21 13:21:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:33,089 INFO L470 AbstractCegarLoop]: Abstraction has 1299 states and 2259 transitions. [2021-12-21 13:21:33,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.0) internal successors, (54), 8 states have internal predecessors, (54), 3 states have call successors, (14), 4 states have call predecessors, (14), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:33,089 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 2259 transitions. [2021-12-21 13:21:33,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-12-21 13:21:33,093 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:33,093 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 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, 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] [2021-12-21 13:21:33,123 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:33,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:33,311 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:33,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:33,312 INFO L85 PathProgramCache]: Analyzing trace with hash 680855499, now seen corresponding path program 1 times [2021-12-21 13:21:33,312 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:33,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665675401] [2021-12-21 13:21:33,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:33,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:33,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:33,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:33,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:33,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:33,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:33,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:33,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:33,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2021-12-21 13:21:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 13:21:33,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:33,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665675401] [2021-12-21 13:21:33,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665675401] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:33,409 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:33,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-12-21 13:21:33,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322849859] [2021-12-21 13:21:33,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:33,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-12-21 13:21:33,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:33,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-12-21 13:21:33,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2021-12-21 13:21:33,410 INFO L87 Difference]: Start difference. First operand 1299 states and 2259 transitions. Second operand has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:34,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:34,267 INFO L93 Difference]: Finished difference Result 2667 states and 5410 transitions. [2021-12-21 13:21:34,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:21:34,268 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 74 [2021-12-21 13:21:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:34,276 INFO L225 Difference]: With dead ends: 2667 [2021-12-21 13:21:34,276 INFO L226 Difference]: Without dead ends: 1386 [2021-12-21 13:21:34,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-12-21 13:21:34,281 INFO L933 BasicCegarLoop]: 182 mSDtfsCounter, 219 mSDsluCounter, 915 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 1097 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:34,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 1097 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 13:21:34,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1386 states. [2021-12-21 13:21:34,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1386 to 1337. [2021-12-21 13:21:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1337 states, 1010 states have (on average 1.1742574257425742) internal successors, (1186), 975 states have internal predecessors, (1186), 132 states have call successors, (132), 69 states have call predecessors, (132), 194 states have return successors, (980), 292 states have call predecessors, (980), 130 states have call successors, (980) [2021-12-21 13:21:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1337 states to 1337 states and 2298 transitions. [2021-12-21 13:21:34,340 INFO L78 Accepts]: Start accepts. Automaton has 1337 states and 2298 transitions. Word has length 74 [2021-12-21 13:21:34,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:34,340 INFO L470 AbstractCegarLoop]: Abstraction has 1337 states and 2298 transitions. [2021-12-21 13:21:34,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 5.444444444444445) internal successors, (49), 6 states have internal predecessors, (49), 4 states have call successors, (14), 6 states have call predecessors, (14), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:34,340 INFO L276 IsEmpty]: Start isEmpty. Operand 1337 states and 2298 transitions. [2021-12-21 13:21:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 13:21:34,343 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:34,343 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:34,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-12-21 13:21:34,344 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash 238868692, now seen corresponding path program 1 times [2021-12-21 13:21:34,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:34,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090507158] [2021-12-21 13:21:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:34,345 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:34,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:34,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:34,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:34,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:34,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:34,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 13:21:34,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:34,465 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-21 13:21:34,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:34,465 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090507158] [2021-12-21 13:21:34,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090507158] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:34,466 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:34,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:21:34,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125634502] [2021-12-21 13:21:34,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:34,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:34,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:34,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:34,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:34,467 INFO L87 Difference]: Start difference. First operand 1337 states and 2298 transitions. Second operand has 9 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:35,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:35,233 INFO L93 Difference]: Finished difference Result 2683 states and 5400 transitions. [2021-12-21 13:21:35,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:21:35,233 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 75 [2021-12-21 13:21:35,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:35,256 INFO L225 Difference]: With dead ends: 2683 [2021-12-21 13:21:35,257 INFO L226 Difference]: Without dead ends: 1364 [2021-12-21 13:21:35,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:21:35,261 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 134 mSDsluCounter, 708 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 859 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:35,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 859 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 13:21:35,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1364 states. [2021-12-21 13:21:35,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1364 to 1344. [2021-12-21 13:21:35,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1344 states, 1016 states have (on average 1.1742125984251968) internal successors, (1193), 981 states have internal predecessors, (1193), 132 states have call successors, (132), 70 states have call predecessors, (132), 195 states have return successors, (980), 292 states have call predecessors, (980), 130 states have call successors, (980) [2021-12-21 13:21:35,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1344 states to 1344 states and 2305 transitions. [2021-12-21 13:21:35,324 INFO L78 Accepts]: Start accepts. Automaton has 1344 states and 2305 transitions. Word has length 75 [2021-12-21 13:21:35,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:35,324 INFO L470 AbstractCegarLoop]: Abstraction has 1344 states and 2305 transitions. [2021-12-21 13:21:35,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 5.875) internal successors, (47), 5 states have internal predecessors, (47), 4 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:35,325 INFO L276 IsEmpty]: Start isEmpty. Operand 1344 states and 2305 transitions. [2021-12-21 13:21:35,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 13:21:35,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:35,328 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:35,328 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-12-21 13:21:35,329 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:35,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:35,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1789717418, now seen corresponding path program 1 times [2021-12-21 13:21:35,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:35,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251760264] [2021-12-21 13:21:35,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:35,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:35,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:35,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:35,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:35,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:35,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:35,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:35,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2021-12-21 13:21:35,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-21 13:21:35,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:35,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251760264] [2021-12-21 13:21:35,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251760264] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:35,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:35,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-12-21 13:21:35,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881443821] [2021-12-21 13:21:35,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:35,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-21 13:21:35,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:35,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-21 13:21:35,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-12-21 13:21:35,461 INFO L87 Difference]: Start difference. First operand 1344 states and 2305 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:36,202 INFO L93 Difference]: Finished difference Result 2662 states and 5343 transitions. [2021-12-21 13:21:36,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-21 13:21:36,202 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 75 [2021-12-21 13:21:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:36,210 INFO L225 Difference]: With dead ends: 2662 [2021-12-21 13:21:36,210 INFO L226 Difference]: Without dead ends: 1336 [2021-12-21 13:21:36,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:21:36,244 INFO L933 BasicCegarLoop]: 176 mSDtfsCounter, 179 mSDsluCounter, 726 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:36,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 902 Invalid, 489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 13:21:36,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1336 states. [2021-12-21 13:21:36,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1336 to 1317. [2021-12-21 13:21:36,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1317 states, 999 states have (on average 1.1761761761761762) internal successors, (1175), 964 states have internal predecessors, (1175), 129 states have call successors, (129), 70 states have call predecessors, (129), 188 states have return successors, (955), 282 states have call predecessors, (955), 127 states have call successors, (955) [2021-12-21 13:21:36,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1317 states to 1317 states and 2259 transitions. [2021-12-21 13:21:36,303 INFO L78 Accepts]: Start accepts. Automaton has 1317 states and 2259 transitions. Word has length 75 [2021-12-21 13:21:36,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:36,304 INFO L470 AbstractCegarLoop]: Abstraction has 1317 states and 2259 transitions. [2021-12-21 13:21:36,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 5 states have internal predecessors, (49), 4 states have call successors, (15), 6 states have call predecessors, (15), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-21 13:21:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1317 states and 2259 transitions. [2021-12-21 13:21:36,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-12-21 13:21:36,308 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:36,308 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:36,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-12-21 13:21:36,308 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:36,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash -1290964072, now seen corresponding path program 1 times [2021-12-21 13:21:36,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:36,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036181887] [2021-12-21 13:21:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:36,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:36,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2021-12-21 13:21:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2021-12-21 13:21:36,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:21:36,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,491 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 5 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 13:21:36,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:36,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036181887] [2021-12-21 13:21:36,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036181887] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:36,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545253949] [2021-12-21 13:21:36,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:36,492 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:36,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:36,508 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:36,547 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 13:21:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:36,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 1175 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-21 13:21:36,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:37,153 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-21 13:21:37,187 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 13:21:37,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-21 13:21:37,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545253949] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:37,401 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:37,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 7] total 16 [2021-12-21 13:21:37,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886501957] [2021-12-21 13:21:37,402 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:37,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-21 13:21:37,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:37,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-21 13:21:37,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-12-21 13:21:37,403 INFO L87 Difference]: Start difference. First operand 1317 states and 2259 transitions. Second operand has 16 states, 15 states have (on average 5.6) internal successors, (84), 11 states have internal predecessors, (84), 5 states have call successors, (21), 8 states have call predecessors, (21), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:21:38,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:38,963 INFO L93 Difference]: Finished difference Result 3303 states and 7132 transitions. [2021-12-21 13:21:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-12-21 13:21:38,964 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 5.6) internal successors, (84), 11 states have internal predecessors, (84), 5 states have call successors, (21), 8 states have call predecessors, (21), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) Word has length 91 [2021-12-21 13:21:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:38,976 INFO L225 Difference]: With dead ends: 3303 [2021-12-21 13:21:38,976 INFO L226 Difference]: Without dead ends: 2004 [2021-12-21 13:21:38,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=208, Invalid=784, Unknown=0, NotChecked=0, Total=992 [2021-12-21 13:21:38,984 INFO L933 BasicCegarLoop]: 200 mSDtfsCounter, 418 mSDsluCounter, 1404 mSDsCounter, 0 mSdLazyCounter, 1253 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 418 SdHoareTripleChecker+Valid, 1604 SdHoareTripleChecker+Invalid, 1529 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:38,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [418 Valid, 1604 Invalid, 1529 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1253 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-12-21 13:21:38,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2004 states. [2021-12-21 13:21:39,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2004 to 1940. [2021-12-21 13:21:39,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1940 states, 1485 states have (on average 1.1521885521885522) internal successors, (1711), 1396 states have internal predecessors, (1711), 164 states have call successors, (164), 94 states have call predecessors, (164), 290 states have return successors, (1915), 449 states have call predecessors, (1915), 162 states have call successors, (1915) [2021-12-21 13:21:39,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1940 states to 1940 states and 3790 transitions. [2021-12-21 13:21:39,130 INFO L78 Accepts]: Start accepts. Automaton has 1940 states and 3790 transitions. Word has length 91 [2021-12-21 13:21:39,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:39,130 INFO L470 AbstractCegarLoop]: Abstraction has 1940 states and 3790 transitions. [2021-12-21 13:21:39,130 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 5.6) internal successors, (84), 11 states have internal predecessors, (84), 5 states have call successors, (21), 8 states have call predecessors, (21), 2 states have return successors, (8), 3 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-21 13:21:39,131 INFO L276 IsEmpty]: Start isEmpty. Operand 1940 states and 3790 transitions. [2021-12-21 13:21:39,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-21 13:21:39,133 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:39,134 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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, 1, 1, 1, 1] [2021-12-21 13:21:39,157 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:39,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-12-21 13:21:39,347 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:39,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:39,348 INFO L85 PathProgramCache]: Analyzing trace with hash -529991506, now seen corresponding path program 1 times [2021-12-21 13:21:39,348 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:39,348 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252752400] [2021-12-21 13:21:39,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:39,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:39,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:39,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:39,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:39,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 13:21:39,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:21:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 13:21:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 13:21:39,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:39,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252752400] [2021-12-21 13:21:39,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252752400] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:39,537 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513325519] [2021-12-21 13:21:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:39,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:39,537 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:39,563 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:39,564 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-21 13:21:39,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 13 conjunts are in the unsatisfiable core [2021-12-21 13:21:39,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:40,064 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2021-12-21 13:21:40,106 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-21 13:21:40,133 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:21:40,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:40,217 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-21 13:21:40,257 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-21 13:21:40,323 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-21 13:21:40,358 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 13:21:40,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513325519] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 13:21:40,358 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 13:21:40,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 18 [2021-12-21 13:21:40,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874408353] [2021-12-21 13:21:40,359 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:40,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-21 13:21:40,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:40,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-21 13:21:40,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-12-21 13:21:40,361 INFO L87 Difference]: Start difference. First operand 1940 states and 3790 transitions. Second operand has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 16 states have internal predecessors, (89), 5 states have call successors, (22), 9 states have call predecessors, (22), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-21 13:21:41,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:41,810 INFO L93 Difference]: Finished difference Result 5014 states and 12840 transitions. [2021-12-21 13:21:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-12-21 13:21:41,811 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 16 states have internal predecessors, (89), 5 states have call successors, (22), 9 states have call predecessors, (22), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) Word has length 75 [2021-12-21 13:21:41,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:41,837 INFO L225 Difference]: With dead ends: 5014 [2021-12-21 13:21:41,837 INFO L226 Difference]: Without dead ends: 3092 [2021-12-21 13:21:41,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=337, Invalid=923, Unknown=0, NotChecked=0, Total=1260 [2021-12-21 13:21:41,870 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 514 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 1156 mSolverCounterSat, 482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 514 SdHoareTripleChecker+Valid, 1435 SdHoareTripleChecker+Invalid, 1638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 482 IncrementalHoareTripleChecker+Valid, 1156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:41,871 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [514 Valid, 1435 Invalid, 1638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [482 Valid, 1156 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2021-12-21 13:21:41,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3092 states. [2021-12-21 13:21:42,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3092 to 2967. [2021-12-21 13:21:42,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2967 states, 2274 states have (on average 1.1125769569041337) internal successors, (2530), 2217 states have internal predecessors, (2530), 187 states have call successors, (187), 112 states have call predecessors, (187), 505 states have return successors, (4302), 637 states have call predecessors, (4302), 185 states have call successors, (4302) [2021-12-21 13:21:42,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2967 states to 2967 states and 7019 transitions. [2021-12-21 13:21:42,049 INFO L78 Accepts]: Start accepts. Automaton has 2967 states and 7019 transitions. Word has length 75 [2021-12-21 13:21:42,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:42,049 INFO L470 AbstractCegarLoop]: Abstraction has 2967 states and 7019 transitions. [2021-12-21 13:21:42,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.944444444444445) internal successors, (89), 16 states have internal predecessors, (89), 5 states have call successors, (22), 9 states have call predecessors, (22), 6 states have return successors, (12), 4 states have call predecessors, (12), 4 states have call successors, (12) [2021-12-21 13:21:42,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2967 states and 7019 transitions. [2021-12-21 13:21:42,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-12-21 13:21:42,055 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:42,056 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:21:42,078 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:42,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-12-21 13:21:42,272 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:42,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:42,272 INFO L85 PathProgramCache]: Analyzing trace with hash -755404158, now seen corresponding path program 1 times [2021-12-21 13:21:42,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:42,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963093992] [2021-12-21 13:21:42,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:42,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:42,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:42,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2021-12-21 13:21:42,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2021-12-21 13:21:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:21:42,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 13:21:42,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 13:21:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:42,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-21 13:21:42,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:42,586 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 37 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-12-21 13:21:42,587 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:42,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963093992] [2021-12-21 13:21:42,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963093992] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:42,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:42,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-12-21 13:21:42,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124790808] [2021-12-21 13:21:42,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:42,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-12-21 13:21:42,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:42,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-12-21 13:21:42,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2021-12-21 13:21:42,590 INFO L87 Difference]: Start difference. First operand 2967 states and 7019 transitions. Second operand has 11 states, 10 states have (on average 7.0) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 13:21:43,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:43,534 INFO L93 Difference]: Finished difference Result 5933 states and 17931 transitions. [2021-12-21 13:21:43,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-21 13:21:43,535 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 109 [2021-12-21 13:21:43,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:43,576 INFO L225 Difference]: With dead ends: 5933 [2021-12-21 13:21:43,576 INFO L226 Difference]: Without dead ends: 2975 [2021-12-21 13:21:43,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-12-21 13:21:43,596 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 169 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 653 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:43,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 690 Invalid, 653 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-12-21 13:21:43,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2975 states. [2021-12-21 13:21:43,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2975 to 2958. [2021-12-21 13:21:43,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2267 states have (on average 1.1124834583149537) internal successors, (2522), 2209 states have internal predecessors, (2522), 187 states have call successors, (187), 112 states have call predecessors, (187), 503 states have return successors, (4299), 636 states have call predecessors, (4299), 185 states have call successors, (4299) [2021-12-21 13:21:43,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 7008 transitions. [2021-12-21 13:21:43,882 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 7008 transitions. Word has length 109 [2021-12-21 13:21:43,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:43,882 INFO L470 AbstractCegarLoop]: Abstraction has 2958 states and 7008 transitions. [2021-12-21 13:21:43,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 7.0) internal successors, (70), 8 states have internal predecessors, (70), 4 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 13:21:43,883 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 7008 transitions. [2021-12-21 13:21:43,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-12-21 13:21:43,889 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:43,889 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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] [2021-12-21 13:21:43,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-12-21 13:21:43,889 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:43,890 INFO L85 PathProgramCache]: Analyzing trace with hash 1144240673, now seen corresponding path program 1 times [2021-12-21 13:21:43,890 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:43,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415943978] [2021-12-21 13:21:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:43,890 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:43,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:44,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:44,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 13:21:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:21:44,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 13:21:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 13:21:44,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:44,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 13:21:44,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-12-21 13:21:44,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:44,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415943978] [2021-12-21 13:21:44,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415943978] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:44,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019832807] [2021-12-21 13:21:44,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:44,291 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:21:44,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:21:44,292 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:21:44,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-21 13:21:44,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-21 13:21:44,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:21:44,904 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2021-12-21 13:21:45,770 WARN L860 $PredicateComparison]: unable to prove that (exists ((|ASStop_#Ultimate.C_memset_#ptr#1.offset| Int) (v_ArrVal_6893 Int) (|v_ASStop_#Ultimate.C_memset_#t~loopctr83#1_6| Int)) (and (= (store |c_old(#memory_int)| c_~user~0.base (store (select |c_old(#memory_int)| c_~user~0.base) (+ |ASStop_#Ultimate.C_memset_#ptr#1.offset| |v_ASStop_#Ultimate.C_memset_#t~loopctr83#1_6|) v_ArrVal_6893)) |c_#memory_int|) (<= (+ c_~user~0.offset 16) |ASStop_#Ultimate.C_memset_#ptr#1.offset|) (<= 0 |v_ASStop_#Ultimate.C_memset_#t~loopctr83#1_6|))) is different from true [2021-12-21 13:21:45,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-21 13:21:45,929 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 21 [2021-12-21 13:21:45,979 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2021-12-21 13:21:46,010 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 33 trivial. 1 not checked. [2021-12-21 13:21:46,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 13:21:46,276 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-21 13:21:46,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 13:21:46,482 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-21 13:21:46,484 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 13:21:46,667 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-21 13:21:46,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 13:21:46,800 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-21 13:21:46,802 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 13:21:46,907 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 17 [2021-12-21 13:21:46,909 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-21 13:21:47,367 WARN L838 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_6962 Int) (|v_ASStop_#Ultimate.C_memset_#ptr#1.offset_66| Int) (|v_ASStop_#Ultimate.C_memset_#t~loopctr83#1_86| Int)) (or (not (<= 0 |v_ASStop_#Ultimate.C_memset_#t~loopctr83#1_86|)) (not (<= (+ c_~user~0.offset 16) |v_ASStop_#Ultimate.C_memset_#ptr#1.offset_66|)) (not (= (select (store (select |c_#memory_int| c_~user~0.base) (+ |v_ASStop_#Ultimate.C_memset_#t~loopctr83#1_86| |v_ASStop_#Ultimate.C_memset_#ptr#1.offset_66|) v_ArrVal_6962) c_~user~0.offset) ~sys_state_s~0~AS_IDLE)))) is different from false [2021-12-21 13:21:47,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019832807] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:21:47,369 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-21 13:21:47,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 21 [2021-12-21 13:21:47,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645566973] [2021-12-21 13:21:47,369 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-21 13:21:47,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-12-21 13:21:47,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:47,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-12-21 13:21:47,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=334, Unknown=2, NotChecked=74, Total=462 [2021-12-21 13:21:47,370 INFO L87 Difference]: Start difference. First operand 2958 states and 7008 transitions. Second operand has 21 states, 19 states have (on average 5.842105263157895) internal successors, (111), 18 states have internal predecessors, (111), 7 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-21 13:21:58,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:21:58,348 INFO L93 Difference]: Finished difference Result 9054 states and 29624 transitions. [2021-12-21 13:21:58,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 13:21:58,349 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 5.842105263157895) internal successors, (111), 18 states have internal predecessors, (111), 7 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) Word has length 111 [2021-12-21 13:21:58,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:21:58,472 INFO L225 Difference]: With dead ends: 9054 [2021-12-21 13:21:58,473 INFO L226 Difference]: Without dead ends: 6114 [2021-12-21 13:21:58,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=211, Invalid=1263, Unknown=16, NotChecked=150, Total=1640 [2021-12-21 13:21:58,493 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 390 mSDsluCounter, 1959 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 404 SdHoareTripleChecker+Valid, 2149 SdHoareTripleChecker+Invalid, 2601 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 291 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-12-21 13:21:58,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [404 Valid, 2149 Invalid, 2601 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 2080 Invalid, 0 Unknown, 291 Unchecked, 2.0s Time] [2021-12-21 13:21:58,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6114 states. [2021-12-21 13:21:59,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6114 to 5637. [2021-12-21 13:21:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5637 states, 4357 states have (on average 1.0858388799632774) internal successors, (4731), 4274 states have internal predecessors, (4731), 270 states have call successors, (270), 167 states have call predecessors, (270), 1009 states have return successors, (10847), 1195 states have call predecessors, (10847), 268 states have call successors, (10847) [2021-12-21 13:21:59,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5637 states to 5637 states and 15848 transitions. [2021-12-21 13:21:59,187 INFO L78 Accepts]: Start accepts. Automaton has 5637 states and 15848 transitions. Word has length 111 [2021-12-21 13:21:59,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:21:59,188 INFO L470 AbstractCegarLoop]: Abstraction has 5637 states and 15848 transitions. [2021-12-21 13:21:59,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 5.842105263157895) internal successors, (111), 18 states have internal predecessors, (111), 7 states have call successors, (24), 6 states have call predecessors, (24), 6 states have return successors, (16), 7 states have call predecessors, (16), 6 states have call successors, (16) [2021-12-21 13:21:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 5637 states and 15848 transitions. [2021-12-21 13:21:59,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-12-21 13:21:59,210 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:21:59,211 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 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, 1, 1] [2021-12-21 13:21:59,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-21 13:21:59,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-12-21 13:21:59,430 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:21:59,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:21:59,431 INFO L85 PathProgramCache]: Analyzing trace with hash -830792850, now seen corresponding path program 1 times [2021-12-21 13:21:59,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:21:59,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084855984] [2021-12-21 13:21:59,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:21:59,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:21:59,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:21:59,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:21:59,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:21:59,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 13:21:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 13:21:59,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:21:59,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 13:21:59,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:21:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-21 13:21:59,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:21:59,724 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-12-21 13:21:59,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:21:59,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084855984] [2021-12-21 13:21:59,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084855984] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:21:59,724 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 13:21:59,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-12-21 13:21:59,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41304521] [2021-12-21 13:21:59,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:21:59,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 13:21:59,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:21:59,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 13:21:59,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2021-12-21 13:21:59,725 INFO L87 Difference]: Start difference. First operand 5637 states and 15848 transitions. Second operand has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 13:22:01,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 13:22:01,085 INFO L93 Difference]: Finished difference Result 11332 states and 41572 transitions. [2021-12-21 13:22:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-21 13:22:01,086 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) Word has length 110 [2021-12-21 13:22:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 13:22:01,154 INFO L225 Difference]: With dead ends: 11332 [2021-12-21 13:22:01,154 INFO L226 Difference]: Without dead ends: 5704 [2021-12-21 13:22:01,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=299, Unknown=0, NotChecked=0, Total=380 [2021-12-21 13:22:01,197 INFO L933 BasicCegarLoop]: 141 mSDtfsCounter, 105 mSDsluCounter, 826 mSDsCounter, 0 mSdLazyCounter, 679 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 967 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 13:22:01,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 967 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 679 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 13:22:01,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5704 states. [2021-12-21 13:22:01,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5704 to 5532. [2021-12-21 13:22:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5532 states, 4279 states have (on average 1.0871698995092312) internal successors, (4652), 4194 states have internal predecessors, (4652), 267 states have call successors, (267), 166 states have call predecessors, (267), 985 states have return successors, (10800), 1171 states have call predecessors, (10800), 265 states have call successors, (10800) [2021-12-21 13:22:01,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5532 states to 5532 states and 15719 transitions. [2021-12-21 13:22:01,812 INFO L78 Accepts]: Start accepts. Automaton has 5532 states and 15719 transitions. Word has length 110 [2021-12-21 13:22:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 13:22:01,813 INFO L470 AbstractCegarLoop]: Abstraction has 5532 states and 15719 transitions. [2021-12-21 13:22:01,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 5.583333333333333) internal successors, (67), 9 states have internal predecessors, (67), 4 states have call successors, (17), 5 states have call predecessors, (17), 4 states have return successors, (9), 4 states have call predecessors, (9), 3 states have call successors, (9) [2021-12-21 13:22:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 5532 states and 15719 transitions. [2021-12-21 13:22:01,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-12-21 13:22:01,823 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 13:22:01,823 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 13:22:01,823 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-12-21 13:22:01,824 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION === [ASIdleErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 13:22:01,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 13:22:01,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1526798103, now seen corresponding path program 1 times [2021-12-21 13:22:01,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 13:22:01,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729093285] [2021-12-21 13:22:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:01,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 13:22:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-21 13:22:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 13:22:01,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2021-12-21 13:22:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2021-12-21 13:22:01,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-21 13:22:01,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2021-12-21 13:22:01,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:01,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2021-12-21 13:22:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:02,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2021-12-21 13:22:02,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:02,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2021-12-21 13:22:02,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:02,121 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-12-21 13:22:02,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 13:22:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729093285] [2021-12-21 13:22:02,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729093285] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 13:22:02,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761277150] [2021-12-21 13:22:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 13:22:02,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 13:22:02,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 13:22:02,124 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 13:22:02,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-21 13:22:02,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 13:22:02,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 13:22:02,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 13:22:02,929 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-12-21 13:22:02,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 13:22:02,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761277150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 13:22:02,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-21 13:22:02,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [12] total 14 [2021-12-21 13:22:02,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053906961] [2021-12-21 13:22:02,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 13:22:02,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-21 13:22:02,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 13:22:02,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-21 13:22:02,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-12-21 13:22:02,931 INFO L87 Difference]: Start difference. First operand 5532 states and 15719 transitions. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 2 states have call successors, (18), 2 states have call predecessors, (18), 3 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9)