./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/reducercommutativity/sep10-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/reducercommutativity/sep10-2.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 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 22:32:07,086 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 22:32:07,093 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 22:32:07,147 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 22:32:07,149 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 22:32:07,152 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 22:32:07,153 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 22:32:07,159 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 22:32:07,161 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 22:32:07,165 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 22:32:07,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 22:32:07,167 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 22:32:07,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 22:32:07,169 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 22:32:07,171 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 22:32:07,174 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 22:32:07,177 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 22:32:07,178 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 22:32:07,179 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 22:32:07,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 22:32:07,186 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 22:32:07,187 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 22:32:07,188 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 22:32:07,189 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 22:32:07,193 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 22:32:07,197 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 22:32:07,198 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 22:32:07,199 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 22:32:07,200 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 22:32:07,201 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 22:32:07,201 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 22:32:07,202 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 22:32:07,203 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 22:32:07,204 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 22:32:07,205 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 22:32:07,205 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 22:32:07,206 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 22:32:07,207 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 22:32:07,207 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 22:32:07,208 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 22:32:07,208 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 22:32:07,209 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-16 22:32:07,238 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 22:32:07,238 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 22:32:07,238 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 22:32:07,239 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 22:32:07,240 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 22:32:07,240 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 22:32:07,240 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 22:32:07,240 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 22:32:07,241 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 22:32:07,241 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 22:32:07,242 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 22:32:07,242 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 22:32:07,242 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 22:32:07,242 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 22:32:07,242 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-16 22:32:07,242 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 22:32:07,243 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-16 22:32:07,243 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 22:32:07,243 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-16 22:32:07,243 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 22:32:07,243 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-16 22:32:07,244 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 22:32:07,244 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 22:32:07,244 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 22:32:07,244 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:32:07,244 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 22:32:07,244 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 22:32:07,246 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-16 22:32:07,246 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 22:32:07,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 22:32:07,246 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-16 22:32:07,246 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-16 22:32:07,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-16 22:32:07,247 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 22:32:07,247 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 246513a49efb434b9c960a67f526057a6e0f9037478ee43a300fa4a565ea6e54 [2021-12-16 22:32:07,502 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 22:32:07,527 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 22:32:07,529 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 22:32:07,530 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 22:32:07,531 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 22:32:07,532 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/reducercommutativity/sep10-2.i [2021-12-16 22:32:07,583 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3240319ae/8ab20fb6f3cf4ce3875b57e6f8854e6f/FLAG34a24c070 [2021-12-16 22:32:07,976 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 22:32:07,976 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/reducercommutativity/sep10-2.i [2021-12-16 22:32:07,981 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3240319ae/8ab20fb6f3cf4ce3875b57e6f8854e6f/FLAG34a24c070 [2021-12-16 22:32:07,994 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3240319ae/8ab20fb6f3cf4ce3875b57e6f8854e6f [2021-12-16 22:32:07,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 22:32:07,998 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 22:32:07,999 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 22:32:07,999 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 22:32:08,002 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 22:32:08,003 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:32:07" (1/1) ... [2021-12-16 22:32:08,003 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@474407c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08, skipping insertion in model container [2021-12-16 22:32:08,004 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 10:32:07" (1/1) ... [2021-12-16 22:32:08,010 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 22:32:08,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 22:32:08,218 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/reducercommutativity/sep10-2.i[1293,1306] [2021-12-16 22:32:08,221 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:32:08,227 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 22:32:08,264 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/reducercommutativity/sep10-2.i[1293,1306] [2021-12-16 22:32:08,266 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 22:32:08,279 INFO L208 MainTranslator]: Completed translation [2021-12-16 22:32:08,279 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08 WrapperNode [2021-12-16 22:32:08,279 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 22:32:08,280 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 22:32:08,281 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 22:32:08,281 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 22:32:08,286 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,299 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,320 INFO L137 Inliner]: procedures = 16, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2021-12-16 22:32:08,320 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 22:32:08,321 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 22:32:08,321 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 22:32:08,321 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 22:32:08,328 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,333 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,333 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,359 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 22:32:08,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 22:32:08,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 22:32:08,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 22:32:08,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (1/1) ... [2021-12-16 22:32:08,370 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 22:32:08,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:08,392 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) [2021-12-16 22:32:08,419 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 [2021-12-16 22:32:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 22:32:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 22:32:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 22:32:08,440 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 22:32:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 22:32:08,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 22:32:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 22:32:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 22:32:08,441 INFO L130 BoogieDeclarations]: Found specification of procedure sep [2021-12-16 22:32:08,442 INFO L138 BoogieDeclarations]: Found implementation of procedure sep [2021-12-16 22:32:08,517 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 22:32:08,518 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 22:32:08,679 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 22:32:08,683 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 22:32:08,684 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-16 22:32:08,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:32:08 BoogieIcfgContainer [2021-12-16 22:32:08,685 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 22:32:08,687 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 22:32:08,687 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 22:32:08,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 22:32:08,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 10:32:07" (1/3) ... [2021-12-16 22:32:08,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453015b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:32:08, skipping insertion in model container [2021-12-16 22:32:08,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 10:32:08" (2/3) ... [2021-12-16 22:32:08,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@453015b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 10:32:08, skipping insertion in model container [2021-12-16 22:32:08,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 10:32:08" (3/3) ... [2021-12-16 22:32:08,692 INFO L111 eAbstractionObserver]: Analyzing ICFG sep10-2.i [2021-12-16 22:32:08,696 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 22:32:08,696 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-16 22:32:08,733 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 22:32:08,739 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 [2021-12-16 22:32:08,739 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-16 22:32:08,759 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:08,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 22:32:08,765 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:08,766 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:08,766 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:08,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:08,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1312709850, now seen corresponding path program 1 times [2021-12-16 22:32:08,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:08,784 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782333035] [2021-12-16 22:32:08,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:08,785 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:08,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:08,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 22:32:08,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:08,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2021-12-16 22:32:08,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:08,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2021-12-16 22:32:08,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:08,970 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:32:08,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:08,971 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782333035] [2021-12-16 22:32:08,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782333035] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:32:08,972 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 22:32:08,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 22:32:08,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98272207] [2021-12-16 22:32:08,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:32:08,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:32:08,980 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:09,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:32:09,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:32:09,014 INFO L87 Difference]: Start difference. First operand has 27 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:32:09,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:09,061 INFO L93 Difference]: Finished difference Result 52 states and 73 transitions. [2021-12-16 22:32:09,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:32:09,064 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-16 22:32:09,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:09,070 INFO L225 Difference]: With dead ends: 52 [2021-12-16 22:32:09,070 INFO L226 Difference]: Without dead ends: 25 [2021-12-16 22:32:09,073 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 22:32:09,077 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 1 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:09,078 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:09,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-12-16 22:32:09,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-12-16 22:32:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2021-12-16 22:32:09,127 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2021-12-16 22:32:09,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:09,127 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2021-12-16 22:32:09,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-16 22:32:09,128 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2021-12-16 22:32:09,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-12-16 22:32:09,131 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:09,131 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:09,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 22:32:09,132 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:09,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1845794557, now seen corresponding path program 1 times [2021-12-16 22:32:09,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:09,135 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985184969] [2021-12-16 22:32:09,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:09,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:32:09,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-16 22:32:09,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-16 22:32:09,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,278 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:32:09,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985184969] [2021-12-16 22:32:09,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985184969] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:09,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811612066] [2021-12-16 22:32:09,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:09,280 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:09,280 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:09,281 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) [2021-12-16 22:32:09,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 22:32:09,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:32:09,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:09,431 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-16 22:32:09,431 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:32:09,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811612066] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:32:09,434 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:32:09,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-12-16 22:32:09,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762172960] [2021-12-16 22:32:09,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:32:09,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:32:09,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:09,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:32:09,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:32:09,440 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:09,457 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2021-12-16 22:32:09,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:32:09,458 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 30 [2021-12-16 22:32:09,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:09,459 INFO L225 Difference]: With dead ends: 45 [2021-12-16 22:32:09,459 INFO L226 Difference]: Without dead ends: 27 [2021-12-16 22:32:09,460 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-12-16 22:32:09,461 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 3 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:09,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:09,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-16 22:32:09,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 25. [2021-12-16 22:32:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2021-12-16 22:32:09,471 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 30 [2021-12-16 22:32:09,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:09,471 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2021-12-16 22:32:09,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:09,471 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2021-12-16 22:32:09,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-16 22:32:09,473 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:09,473 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:09,504 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:09,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:09,699 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:09,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:09,700 INFO L85 PathProgramCache]: Analyzing trace with hash -701057785, now seen corresponding path program 1 times [2021-12-16 22:32:09,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:09,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626385971] [2021-12-16 22:32:09,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:09,700 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:09,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:32:09,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 22:32:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2021-12-16 22:32:09,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,831 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 22:32:09,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626385971] [2021-12-16 22:32:09,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626385971] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:09,837 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017142447] [2021-12-16 22:32:09,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:09,837 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:09,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:09,840 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) [2021-12-16 22:32:09,844 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 22:32:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:09,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-16 22:32:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:10,004 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-12-16 22:32:10,005 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 22:32:10,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017142447] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 22:32:10,005 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-16 22:32:10,006 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-12-16 22:32:10,006 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853139788] [2021-12-16 22:32:10,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 22:32:10,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 22:32:10,007 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:10,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 22:32:10,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:32:10,009 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:10,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:10,023 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2021-12-16 22:32:10,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 22:32:10,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2021-12-16 22:32:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:10,025 INFO L225 Difference]: With dead ends: 41 [2021-12-16 22:32:10,026 INFO L226 Difference]: Without dead ends: 27 [2021-12-16 22:32:10,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 22:32:10,029 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:10,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 49 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:10,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-16 22:32:10,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2021-12-16 22:32:10,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:10,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-16 22:32:10,040 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 39 [2021-12-16 22:32:10,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:10,041 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-16 22:32:10,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.666666666666666) internal successors, (26), 3 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-16 22:32:10,041 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-16 22:32:10,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 22:32:10,045 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:10,045 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:10,071 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:10,269 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,SelfDestructingSolverStorable2 [2021-12-16 22:32:10,269 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:10,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:10,270 INFO L85 PathProgramCache]: Analyzing trace with hash -235909079, now seen corresponding path program 1 times [2021-12-16 22:32:10,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:10,270 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577327588] [2021-12-16 22:32:10,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:10,270 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:10,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 22:32:10,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:10,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-16 22:32:10,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:10,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2021-12-16 22:32:10,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:10,367 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 22:32:10,368 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577327588] [2021-12-16 22:32:10,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577327588] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:10,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088156763] [2021-12-16 22:32:10,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:10,369 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:10,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:10,370 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) [2021-12-16 22:32:10,397 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 22:32:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:10,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 22:32:10,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:10,541 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 22:32:10,542 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:10,653 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-12-16 22:32:10,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088156763] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:10,653 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:10,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2021-12-16 22:32:10,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668265273] [2021-12-16 22:32:10,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:10,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 22:32:10,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:10,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 22:32:10,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:32:10,659 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:10,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:10,706 INFO L93 Difference]: Finished difference Result 58 states and 76 transitions. [2021-12-16 22:32:10,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:32:10,709 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 41 [2021-12-16 22:32:10,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:10,710 INFO L225 Difference]: With dead ends: 58 [2021-12-16 22:32:10,710 INFO L226 Difference]: Without dead ends: 37 [2021-12-16 22:32:10,711 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:32:10,712 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 12 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:10,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 156 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:10,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-12-16 22:32:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2021-12-16 22:32:10,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2021-12-16 22:32:10,717 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 41 [2021-12-16 22:32:10,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:10,718 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2021-12-16 22:32:10,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2021-12-16 22:32:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2021-12-16 22:32:10,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-12-16 22:32:10,719 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:10,719 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:10,742 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:10,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:10,936 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:10,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1946429025, now seen corresponding path program 2 times [2021-12-16 22:32:10,936 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:10,937 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821747237] [2021-12-16 22:32:10,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:10,937 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:10,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-16 22:32:10,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2021-12-16 22:32:11,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2021-12-16 22:32:11,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,017 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-12-16 22:32:11,018 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:11,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821747237] [2021-12-16 22:32:11,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821747237] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:11,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236951681] [2021-12-16 22:32:11,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:32:11,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:11,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:11,020 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) [2021-12-16 22:32:11,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-16 22:32:11,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:32:11,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:11,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 22:32:11,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:11,194 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 22:32:11,195 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:11,340 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-12-16 22:32:11,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236951681] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:11,341 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:11,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2021-12-16 22:32:11,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269010601] [2021-12-16 22:32:11,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:11,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-12-16 22:32:11,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:11,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-12-16 22:32:11,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:32:11,343 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 22:32:11,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:11,404 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2021-12-16 22:32:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-12-16 22:32:11,405 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 56 [2021-12-16 22:32:11,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:11,405 INFO L225 Difference]: With dead ends: 74 [2021-12-16 22:32:11,405 INFO L226 Difference]: Without dead ends: 50 [2021-12-16 22:32:11,406 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-12-16 22:32:11,406 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 17 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:11,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 111 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 22:32:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-12-16 22:32:11,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-12-16 22:32:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 states have internal predecessors, (49), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:11,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 55 transitions. [2021-12-16 22:32:11,412 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 55 transitions. Word has length 56 [2021-12-16 22:32:11,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:11,412 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 55 transitions. [2021-12-16 22:32:11,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 14 states have internal predecessors, (53), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-12-16 22:32:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 55 transitions. [2021-12-16 22:32:11,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-12-16 22:32:11,413 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:11,413 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:11,467 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-16 22:32:11,627 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:11,627 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:11,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:11,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1341839115, now seen corresponding path program 3 times [2021-12-16 22:32:11,628 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:11,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66223718] [2021-12-16 22:32:11,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:11,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:11,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:32:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2021-12-16 22:32:11,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2021-12-16 22:32:11,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:11,788 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-16 22:32:11,789 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:11,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66223718] [2021-12-16 22:32:11,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66223718] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:11,791 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750981625] [2021-12-16 22:32:11,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:32:11,791 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:11,791 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:11,792 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) [2021-12-16 22:32:11,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-16 22:32:11,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-12-16 22:32:11,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:11,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:32:11,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:11,970 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-16 22:32:11,970 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:12,078 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 40 proven. 5 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2021-12-16 22:32:12,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750981625] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:12,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:12,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-12-16 22:32:12,081 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018957887] [2021-12-16 22:32:12,081 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:12,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-12-16 22:32:12,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:12,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-12-16 22:32:12,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-16 22:32:12,083 INFO L87 Difference]: Start difference. First operand 49 states and 55 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:32:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:12,116 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2021-12-16 22:32:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:32:12,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 70 [2021-12-16 22:32:12,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:12,117 INFO L225 Difference]: With dead ends: 86 [2021-12-16 22:32:12,118 INFO L226 Difference]: Without dead ends: 61 [2021-12-16 22:32:12,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-12-16 22:32:12,119 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 26 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:12,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 80 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:12,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-12-16 22:32:12,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-12-16 22:32:12,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 56 states have internal predecessors, (65), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:12,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2021-12-16 22:32:12,125 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 70 [2021-12-16 22:32:12,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:12,126 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2021-12-16 22:32:12,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 8 states have internal predecessors, (45), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-12-16 22:32:12,126 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2021-12-16 22:32:12,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-12-16 22:32:12,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:12,129 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:12,148 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-16 22:32:12,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:12,330 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:12,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:12,330 INFO L85 PathProgramCache]: Analyzing trace with hash -189786485, now seen corresponding path program 4 times [2021-12-16 22:32:12,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:12,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854475209] [2021-12-16 22:32:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:12,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:12,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:12,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:32:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:12,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2021-12-16 22:32:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:12,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2021-12-16 22:32:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-12-16 22:32:12,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:12,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854475209] [2021-12-16 22:32:12,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854475209] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:12,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063081137] [2021-12-16 22:32:12,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-16 22:32:12,504 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:12,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:12,506 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) [2021-12-16 22:32:12,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-16 22:32:12,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-16 22:32:12,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:12,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 22:32:12,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 244 proven. 51 refuted. 0 times theorem prover too weak. 337 trivial. 0 not checked. [2021-12-16 22:32:12,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:12,922 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 299 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2021-12-16 22:32:12,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063081137] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:12,923 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:12,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-12-16 22:32:12,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077756912] [2021-12-16 22:32:12,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:12,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 22:32:12,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:12,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 22:32:12,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:32:12,926 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:32:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:12,964 INFO L93 Difference]: Finished difference Result 110 states and 139 transitions. [2021-12-16 22:32:12,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 22:32:12,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 106 [2021-12-16 22:32:12,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:12,968 INFO L225 Difference]: With dead ends: 110 [2021-12-16 22:32:12,968 INFO L226 Difference]: Without dead ends: 73 [2021-12-16 22:32:12,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 214 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:32:12,969 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:12,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:12,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-12-16 22:32:12,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-12-16 22:32:12,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.1911764705882353) internal successors, (81), 68 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:12,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 87 transitions. [2021-12-16 22:32:12,977 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 87 transitions. Word has length 106 [2021-12-16 22:32:12,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:12,977 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 87 transitions. [2021-12-16 22:32:12,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 12 states have internal predecessors, (59), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2021-12-16 22:32:12,978 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 87 transitions. [2021-12-16 22:32:12,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-12-16 22:32:12,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:12,979 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:13,006 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:13,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:13,204 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:13,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:13,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1263048203, now seen corresponding path program 5 times [2021-12-16 22:32:13,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:13,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872356259] [2021-12-16 22:32:13,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:13,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:13,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:13,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:32:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:13,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 22:32:13,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:13,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2021-12-16 22:32:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:13,333 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-12-16 22:32:13,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872356259] [2021-12-16 22:32:13,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872356259] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:13,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731734886] [2021-12-16 22:32:13,334 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-16 22:32:13,334 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:13,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:13,336 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) [2021-12-16 22:32:13,337 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-16 22:32:13,731 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-12-16 22:32:13,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:13,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 22:32:13,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 650 proven. 4 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-16 22:32:13,915 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:14,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1514 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-12-16 22:32:14,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731734886] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:14,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:14,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-16 22:32:14,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650882498] [2021-12-16 22:32:14,105 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:14,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 22:32:14,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 22:32:14,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:32:14,106 INFO L87 Difference]: Start difference. First operand 73 states and 87 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:32:14,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:14,134 INFO L93 Difference]: Finished difference Result 122 states and 150 transitions. [2021-12-16 22:32:14,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 22:32:14,135 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 142 [2021-12-16 22:32:14,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:14,139 INFO L225 Difference]: With dead ends: 122 [2021-12-16 22:32:14,139 INFO L226 Difference]: Without dead ends: 81 [2021-12-16 22:32:14,140 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 286 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-12-16 22:32:14,140 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:14,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 95 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:14,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-12-16 22:32:14,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-12-16 22:32:14,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:14,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 95 transitions. [2021-12-16 22:32:14,157 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 95 transitions. Word has length 142 [2021-12-16 22:32:14,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:14,158 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 95 transitions. [2021-12-16 22:32:14,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:32:14,158 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 95 transitions. [2021-12-16 22:32:14,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-12-16 22:32:14,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:14,160 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:14,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:14,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:14,368 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:14,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:14,368 INFO L85 PathProgramCache]: Analyzing trace with hash -660788349, now seen corresponding path program 6 times [2021-12-16 22:32:14,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:14,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238888662] [2021-12-16 22:32:14,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:14,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:14,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:32:14,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:14,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 22:32:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:14,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2021-12-16 22:32:14,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:14,550 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-12-16 22:32:14,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:14,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238888662] [2021-12-16 22:32:14,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238888662] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:14,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005059148] [2021-12-16 22:32:14,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-12-16 22:32:14,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:14,551 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:14,552 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:32:14,553 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-16 22:32:14,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-12-16 22:32:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:14,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 22:32:14,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:14,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 650 proven. 36 refuted. 0 times theorem prover too weak. 860 trivial. 0 not checked. [2021-12-16 22:32:14,996 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 1546 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 1510 trivial. 0 not checked. [2021-12-16 22:32:15,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005059148] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:15,214 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:15,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2021-12-16 22:32:15,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665056856] [2021-12-16 22:32:15,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:15,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-16 22:32:15,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:15,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-16 22:32:15,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:32:15,216 INFO L87 Difference]: Start difference. First operand 81 states and 95 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:32:15,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:15,246 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2021-12-16 22:32:15,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-12-16 22:32:15,246 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 150 [2021-12-16 22:32:15,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:15,247 INFO L225 Difference]: With dead ends: 128 [2021-12-16 22:32:15,247 INFO L226 Difference]: Without dead ends: 87 [2021-12-16 22:32:15,248 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 302 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-16 22:32:15,248 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:15,249 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 95 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 22:32:15,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-12-16 22:32:15,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-12-16 22:32:15,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1585365853658536) internal successors, (95), 82 states have internal predecessors, (95), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 22:32:15,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 101 transitions. [2021-12-16 22:32:15,255 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 101 transitions. Word has length 150 [2021-12-16 22:32:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:15,256 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 101 transitions. [2021-12-16 22:32:15,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2021-12-16 22:32:15,256 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 101 transitions. [2021-12-16 22:32:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-16 22:32:15,257 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:15,258 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:15,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:15,479 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-16 22:32:15,480 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:15,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:15,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1766594339, now seen corresponding path program 7 times [2021-12-16 22:32:15,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:15,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277389304] [2021-12-16 22:32:15,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:15,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:32:16,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 22:32:16,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 22:32:16,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-12-16 22:32:16,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:16,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277389304] [2021-12-16 22:32:16,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277389304] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:16,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318234817] [2021-12-16 22:32:16,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-12-16 22:32:16,548 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:16,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:16,552 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:32:16,571 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 22:32:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 86 conjunts are in the unsatisfiable core [2021-12-16 22:32:16,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 0 proven. 1305 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2021-12-16 22:32:17,787 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 2 proven. 1307 refuted. 0 times theorem prover too weak. 282 trivial. 0 not checked. [2021-12-16 22:32:18,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318234817] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:18,983 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:18,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 21] total 35 [2021-12-16 22:32:18,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153950181] [2021-12-16 22:32:18,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:18,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-12-16 22:32:18,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:18,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-12-16 22:32:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1102, Unknown=0, NotChecked=0, Total=1190 [2021-12-16 22:32:18,987 INFO L87 Difference]: Start difference. First operand 87 states and 101 transitions. Second operand has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 30 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:32:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:19,650 INFO L93 Difference]: Finished difference Result 293 states and 410 transitions. [2021-12-16 22:32:19,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-12-16 22:32:19,650 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 30 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 156 [2021-12-16 22:32:19,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:19,655 INFO L225 Difference]: With dead ends: 293 [2021-12-16 22:32:19,655 INFO L226 Difference]: Without dead ends: 289 [2021-12-16 22:32:19,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 309 SyntacticMatches, 15 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2021-12-16 22:32:19,656 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 62 mSDsluCounter, 2934 mSDsCounter, 0 mSdLazyCounter, 1121 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 3062 SdHoareTripleChecker+Invalid, 1144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:19,657 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 3062 Invalid, 1144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1121 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-12-16 22:32:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-12-16 22:32:19,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 229. [2021-12-16 22:32:19,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 221 states have (on average 1.2714932126696832) internal successors, (281), 222 states have internal predecessors, (281), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (9), 5 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-16 22:32:19,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 295 transitions. [2021-12-16 22:32:19,721 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 295 transitions. Word has length 156 [2021-12-16 22:32:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:19,722 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 295 transitions. [2021-12-16 22:32:19,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.5294117647058822) internal successors, (86), 30 states have internal predecessors, (86), 3 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-16 22:32:19,723 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 295 transitions. [2021-12-16 22:32:19,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-16 22:32:19,725 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:19,725 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:19,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:19,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-16 22:32:19,926 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:19,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:19,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1086535969, now seen corresponding path program 1 times [2021-12-16 22:32:19,927 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:19,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202712142] [2021-12-16 22:32:19,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:19,927 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:20,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:20,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:32:20,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:20,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 22:32:21,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:21,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 22:32:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 648 proven. 703 refuted. 0 times theorem prover too weak. 240 trivial. 0 not checked. [2021-12-16 22:32:21,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:21,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202712142] [2021-12-16 22:32:21,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202712142] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:21,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063099590] [2021-12-16 22:32:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:21,797 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:21,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:21,800 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:32:21,823 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-16 22:32:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:21,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 76 conjunts are in the unsatisfiable core [2021-12-16 22:32:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:22,038 INFO L388 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 6 treesize of output 5 [2021-12-16 22:32:22,625 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 22:32:22,626 INFO L173 IndexEqualityManager]: detected equality via solver [2021-12-16 22:32:22,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-16 22:32:22,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 36 [2021-12-16 22:32:22,957 INFO L388 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 23 treesize of output 11 [2021-12-16 22:32:23,059 INFO L388 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 17 treesize of output 13 [2021-12-16 22:32:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 7 proven. 1187 refuted. 0 times theorem prover too weak. 397 trivial. 0 not checked. [2021-12-16 22:32:24,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:32:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 386 proven. 776 refuted. 0 times theorem prover too weak. 429 trivial. 0 not checked. [2021-12-16 22:32:26,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063099590] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:32:26,050 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:32:26,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 27, 22] total 80 [2021-12-16 22:32:26,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944895670] [2021-12-16 22:32:26,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:32:26,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-16 22:32:26,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:32:26,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-16 22:32:26,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=6026, Unknown=0, NotChecked=0, Total=6320 [2021-12-16 22:32:26,055 INFO L87 Difference]: Start difference. First operand 229 states and 295 transitions. Second operand has 80 states, 78 states have (on average 2.7051282051282053) internal successors, (211), 77 states have internal predecessors, (211), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-16 22:32:33,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:32:33,685 INFO L93 Difference]: Finished difference Result 893 states and 1278 transitions. [2021-12-16 22:32:33,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-12-16 22:32:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 78 states have (on average 2.7051282051282053) internal successors, (211), 77 states have internal predecessors, (211), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 156 [2021-12-16 22:32:33,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:32:33,692 INFO L225 Difference]: With dead ends: 893 [2021-12-16 22:32:33,693 INFO L226 Difference]: Without dead ends: 868 [2021-12-16 22:32:33,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 372 SyntacticMatches, 16 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 10116 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1818, Invalid=30402, Unknown=0, NotChecked=0, Total=32220 [2021-12-16 22:32:33,705 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 285 mSDsluCounter, 2545 mSDsCounter, 0 mSdLazyCounter, 1984 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 2622 SdHoareTripleChecker+Invalid, 5576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1984 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3576 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-16 22:32:33,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 2622 Invalid, 5576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1984 Invalid, 0 Unknown, 3576 Unchecked, 0.9s Time] [2021-12-16 22:32:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2021-12-16 22:32:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 799. [2021-12-16 22:32:33,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 777 states have (on average 1.3371943371943371) internal successors, (1039), 784 states have internal predecessors, (1039), 11 states have call successors, (11), 3 states have call predecessors, (11), 10 states have return successors, (71), 11 states have call predecessors, (71), 11 states have call successors, (71) [2021-12-16 22:32:33,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 1121 transitions. [2021-12-16 22:32:33,762 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 1121 transitions. Word has length 156 [2021-12-16 22:32:33,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:32:33,762 INFO L470 AbstractCegarLoop]: Abstraction has 799 states and 1121 transitions. [2021-12-16 22:32:33,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 78 states have (on average 2.7051282051282053) internal successors, (211), 77 states have internal predecessors, (211), 6 states have call successors, (8), 3 states have call predecessors, (8), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-16 22:32:33,763 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 1121 transitions. [2021-12-16 22:32:33,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-16 22:32:33,771 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:32:33,771 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:32:33,797 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-16 22:32:33,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-16 22:32:33,985 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:32:33,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:32:33,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1508428901, now seen corresponding path program 2 times [2021-12-16 22:32:33,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:32:33,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696654757] [2021-12-16 22:32:33,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:32:33,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:32:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:35,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:32:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:35,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 22:32:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:35,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 22:32:35,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:32:36,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 326 proven. 1092 refuted. 0 times theorem prover too weak. 173 trivial. 0 not checked. [2021-12-16 22:32:36,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:32:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696654757] [2021-12-16 22:32:36,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696654757] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:32:36,112 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393390894] [2021-12-16 22:32:36,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 22:32:36,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:32:36,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:32:36,113 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:32:36,135 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-16 22:32:36,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 22:32:36,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:32:36,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 549 conjuncts, 154 conjunts are in the unsatisfiable core [2021-12-16 22:32:36,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:32:36,588 INFO L388 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 6 treesize of output 5 [2021-12-16 22:32:36,912 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 22:32:36,913 INFO L388 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 1 case distinctions, treesize of input 16 treesize of output 17 [2021-12-16 22:32:37,395 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:32:37,399 INFO L388 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 39 treesize of output 32 [2021-12-16 22:32:37,468 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:32:37,469 INFO L388 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 39 treesize of output 32 [2021-12-16 22:32:37,532 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:32:37,533 INFO L388 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 39 treesize of output 32 [2021-12-16 22:32:37,615 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:32:37,616 INFO L388 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 39 treesize of output 32 [2021-12-16 22:32:37,693 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:32:37,694 INFO L388 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 39 treesize of output 32 [2021-12-16 22:32:37,755 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:32:37,755 INFO L388 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 39 treesize of output 32 [2021-12-16 22:32:37,818 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:32:37,818 INFO L388 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 39 treesize of output 32 [2021-12-16 22:32:37,930 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:32:37,930 INFO L388 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 39 treesize of output 32 [2021-12-16 22:32:37,995 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:32:37,995 INFO L388 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 43 treesize of output 30 [2021-12-16 22:32:38,072 INFO L354 Elim1Store]: treesize reduction 39, result has 18.8 percent of original size [2021-12-16 22:32:38,073 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 52 treesize of output 33 [2021-12-16 22:32:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 120 proven. 1439 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-12-16 22:32:56,231 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:33:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 710 proven. 631 refuted. 0 times theorem prover too weak. 250 trivial. 0 not checked. [2021-12-16 22:33:19,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393390894] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 22:33:19,182 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 22:33:19,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 47, 44] total 119 [2021-12-16 22:33:19,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573733992] [2021-12-16 22:33:19,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 22:33:19,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-12-16 22:33:19,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:33:19,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-12-16 22:33:19,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=13505, Unknown=41, NotChecked=0, Total=14042 [2021-12-16 22:33:19,187 INFO L87 Difference]: Start difference. First operand 799 states and 1121 transitions. Second operand has 119 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 117 states have internal predecessors, (256), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-16 22:34:52,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 22:34:52,991 INFO L93 Difference]: Finished difference Result 2480 states and 3585 transitions. [2021-12-16 22:34:52,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-12-16 22:34:52,991 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 117 states have internal predecessors, (256), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) Word has length 156 [2021-12-16 22:34:52,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 22:34:53,001 INFO L225 Difference]: With dead ends: 2480 [2021-12-16 22:34:53,001 INFO L226 Difference]: Without dead ends: 1640 [2021-12-16 22:34:53,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 267 SyntacticMatches, 18 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8381 ImplicationChecksByTransitivity, 132.5s TimeCoverageRelationStatistics Valid=1253, Invalid=23776, Unknown=93, NotChecked=0, Total=25122 [2021-12-16 22:34:53,011 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 318 mSDsluCounter, 4518 mSDsCounter, 0 mSdLazyCounter, 6312 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 4591 SdHoareTripleChecker+Invalid, 8997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 6312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2543 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-12-16 22:34:53,011 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 4591 Invalid, 8997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 6312 Invalid, 0 Unknown, 2543 Unchecked, 3.2s Time] [2021-12-16 22:34:53,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1640 states. [2021-12-16 22:34:53,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1640 to 1461. [2021-12-16 22:34:53,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1461 states, 1425 states have (on average 1.3291228070175438) internal successors, (1894), 1440 states have internal predecessors, (1894), 15 states have call successors, (15), 5 states have call predecessors, (15), 20 states have return successors, (165), 15 states have call predecessors, (165), 15 states have call successors, (165) [2021-12-16 22:34:53,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1461 states to 1461 states and 2074 transitions. [2021-12-16 22:34:53,105 INFO L78 Accepts]: Start accepts. Automaton has 1461 states and 2074 transitions. Word has length 156 [2021-12-16 22:34:53,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 22:34:53,106 INFO L470 AbstractCegarLoop]: Abstraction has 1461 states and 2074 transitions. [2021-12-16 22:34:53,106 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.1512605042016806) internal successors, (256), 117 states have internal predecessors, (256), 5 states have call successors, (7), 2 states have call predecessors, (7), 4 states have return successors, (7), 4 states have call predecessors, (7), 5 states have call successors, (7) [2021-12-16 22:34:53,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1461 states and 2074 transitions. [2021-12-16 22:34:53,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-12-16 22:34:53,119 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 22:34:53,120 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 10, 10, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 22:34:53,151 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-16 22:34:53,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-16 22:34:53,335 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-16 22:34:53,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 22:34:53,335 INFO L85 PathProgramCache]: Analyzing trace with hash 1248509279, now seen corresponding path program 3 times [2021-12-16 22:34:53,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 22:34:53,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147430855] [2021-12-16 22:34:53,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 22:34:53,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 22:34:53,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:34:54,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2021-12-16 22:34:54,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:34:54,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2021-12-16 22:34:54,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:34:54,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2021-12-16 22:34:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 22:34:55,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 650 proven. 770 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2021-12-16 22:34:55,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 22:34:55,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147430855] [2021-12-16 22:34:55,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147430855] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:34:55,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593567030] [2021-12-16 22:34:55,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-16 22:34:55,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 22:34:55,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 22:34:55,056 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 22:34:55,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-16 22:34:56,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-12-16 22:34:56,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 22:34:56,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 513 conjuncts, 107 conjunts are in the unsatisfiable core [2021-12-16 22:34:56,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 22:34:56,562 INFO L388 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 6 treesize of output 5 [2021-12-16 22:34:57,068 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:34:57,068 INFO L388 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 39 treesize of output 32 [2021-12-16 22:34:57,131 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:34:57,132 INFO L388 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 39 treesize of output 32 [2021-12-16 22:34:57,190 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:34:57,191 INFO L388 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 39 treesize of output 32 [2021-12-16 22:34:57,255 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:34:57,255 INFO L388 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 39 treesize of output 32 [2021-12-16 22:34:57,318 INFO L354 Elim1Store]: treesize reduction 31, result has 22.5 percent of original size [2021-12-16 22:34:57,318 INFO L388 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 39 treesize of output 32 [2021-12-16 22:34:57,334 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-16 22:34:57,334 INFO L388 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 39 treesize of output 38 [2021-12-16 22:34:57,464 INFO L354 Elim1Store]: treesize reduction 25, result has 37.5 percent of original size [2021-12-16 22:34:57,464 INFO L388 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 41 treesize of output 40 [2021-12-16 22:34:57,641 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-12-16 22:34:57,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 52 [2021-12-16 22:34:57,811 INFO L354 Elim1Store]: treesize reduction 99, result has 27.7 percent of original size [2021-12-16 22:34:57,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 63 treesize of output 67 [2021-12-16 22:34:58,071 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 22:34:58,072 INFO L388 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 35 treesize of output 28 [2021-12-16 22:35:44,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1591 backedges. 605 proven. 706 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2021-12-16 22:35:44,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 22:35:45,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593567030] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 22:35:45,181 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 22:35:45,181 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 41] total 80 [2021-12-16 22:35:45,181 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275066386] [2021-12-16 22:35:45,181 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 22:35:45,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-12-16 22:35:45,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 22:35:45,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-12-16 22:35:45,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=6042, Unknown=29, NotChecked=0, Total=6480 [2021-12-16 22:35:45,183 INFO L87 Difference]: Start difference. First operand 1461 states and 2074 transitions. Second operand has 80 states, 80 states have (on average 2.15) internal successors, (172), 78 states have internal predecessors, (172), 4 states have call successors, (6), 2 states have call predecessors, (6), 4 states have return successors, (6), 5 states have call predecessors, (6), 4 states have call successors, (6) Killed by 15