./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b 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/array-examples/standard_strcpy_original-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 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:13:40,078 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:13:40,080 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:13:40,122 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:13:40,122 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:13:40,126 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:13:40,127 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:13:40,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:13:40,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:13:40,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:13:40,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:13:40,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:13:40,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:13:40,144 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:13:40,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:13:40,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:13:40,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:13:40,148 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:13:40,150 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:13:40,151 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:13:40,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:13:40,153 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:13:40,154 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:13:40,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:13:40,157 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:13:40,158 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:13:40,158 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:13:40,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:13:40,159 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:13:40,160 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:13:40,160 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:13:40,161 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:13:40,161 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:13:40,162 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:13:40,163 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:13:40,163 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:13:40,164 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:13:40,164 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:13:40,164 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:13:40,165 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:13:40,166 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:13:40,168 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:13:40,198 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:13:40,199 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:13:40,200 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:13:40,200 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:13:40,201 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:13:40,201 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:13:40,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:13:40,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:13:40,202 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:13:40,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:13:40,203 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:13:40,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:13:40,204 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:13:40,204 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:13:40,204 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:13:40,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:13:40,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:13:40,205 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:13:40,205 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:13:40,205 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:13:40,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:13:40,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:13:40,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:13:40,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:13:40,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:13:40,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:13:40,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:13:40,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:13:40,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:13:40,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:13:40,207 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:13:40,207 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:13:40,208 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:13:40,208 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:13:40,208 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d1a303ac3a0660bf920920173d22fca6c20b09d575ad3b8f2f9d91205d4f1f6 [2021-12-14 11:13:40,436 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:13:40,460 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:13:40,464 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:13:40,465 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:13:40,465 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:13:40,467 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-12-14 11:13:40,531 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52610cba/13bee8c85fa143ffb587e9ddc6e14210/FLAG90c10c3ea [2021-12-14 11:13:40,893 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:13:40,893 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_strcpy_original-2.i [2021-12-14 11:13:40,899 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52610cba/13bee8c85fa143ffb587e9ddc6e14210/FLAG90c10c3ea [2021-12-14 11:13:40,914 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f52610cba/13bee8c85fa143ffb587e9ddc6e14210 [2021-12-14 11:13:40,916 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:13:40,917 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:13:40,921 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:13:40,921 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:13:40,924 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:13:40,925 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:13:40" (1/1) ... [2021-12-14 11:13:40,926 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@642382b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:40, skipping insertion in model container [2021-12-14 11:13:40,926 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:13:40" (1/1) ... [2021-12-14 11:13:40,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:13:40,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:13:41,090 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/array-examples/standard_strcpy_original-2.i[896,909] [2021-12-14 11:13:41,109 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:13:41,116 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:13:41,131 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/array-examples/standard_strcpy_original-2.i[896,909] [2021-12-14 11:13:41,151 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:13:41,164 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:13:41,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41 WrapperNode [2021-12-14 11:13:41,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:13:41,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:13:41,167 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:13:41,167 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:13:41,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,180 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,200 INFO L137 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 71 [2021-12-14 11:13:41,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:13:41,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:13:41,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:13:41,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:13:41,209 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,219 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,219 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,232 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,236 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,242 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:13:41,244 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:13:41,245 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:13:41,245 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:13:41,246 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (1/1) ... [2021-12-14 11:13:41,252 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:13:41,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:41,276 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) [2021-12-14 11:13:41,291 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 [2021-12-14 11:13:41,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:13:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:13:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:13:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:13:41,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:13:41,319 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:13:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:13:41,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:13:41,377 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:13:41,379 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:13:41,480 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:13:41,485 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:13:41,485 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 11:13:41,487 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:13:41 BoogieIcfgContainer [2021-12-14 11:13:41,487 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:13:41,489 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:13:41,489 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:13:41,491 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:13:41,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:13:40" (1/3) ... [2021-12-14 11:13:41,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702c72fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:13:41, skipping insertion in model container [2021-12-14 11:13:41,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:13:41" (2/3) ... [2021-12-14 11:13:41,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@702c72fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:13:41, skipping insertion in model container [2021-12-14 11:13:41,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:13:41" (3/3) ... [2021-12-14 11:13:41,493 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-2.i [2021-12-14 11:13:41,497 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:13:41,497 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:13:41,531 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:13:41,537 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 [2021-12-14 11:13:41,537 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:13:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-14 11:13:41,562 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:41,562 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:41,563 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:41,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:41,567 INFO L85 PathProgramCache]: Analyzing trace with hash 112467144, now seen corresponding path program 1 times [2021-12-14 11:13:41,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:41,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991635184] [2021-12-14 11:13:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:41,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:13:41,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:41,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991635184] [2021-12-14 11:13:41,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991635184] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:13:41,758 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:13:41,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:13:41,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832094261] [2021-12-14 11:13:41,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:13:41,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:13:41,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:13:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:13:41,824 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:41,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:41,863 INFO L93 Difference]: Finished difference Result 34 states and 50 transitions. [2021-12-14 11:13:41,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:13:41,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-14 11:13:41,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:41,890 INFO L225 Difference]: With dead ends: 34 [2021-12-14 11:13:41,890 INFO L226 Difference]: Without dead ends: 15 [2021-12-14 11:13:41,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:13:41,896 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:41,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:13:41,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-12-14 11:13:41,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-12-14 11:13:41,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:41,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 19 transitions. [2021-12-14 11:13:41,935 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 19 transitions. Word has length 10 [2021-12-14 11:13:41,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:41,935 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 19 transitions. [2021-12-14 11:13:41,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:41,937 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 19 transitions. [2021-12-14 11:13:41,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-14 11:13:41,938 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:41,938 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:41,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:13:41,939 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:41,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:41,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1363852218, now seen corresponding path program 1 times [2021-12-14 11:13:41,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:41,943 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [801711922] [2021-12-14 11:13:41,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:41,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:41,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:42,002 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:13:42,003 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:42,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [801711922] [2021-12-14 11:13:42,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [801711922] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:42,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185265293] [2021-12-14 11:13:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:42,009 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:42,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:42,016 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) [2021-12-14 11:13:42,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 11:13:42,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:42,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 11:13:42,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:42,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:13:42,137 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:42,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:13:42,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185265293] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:42,221 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:42,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 11:13:42,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73362437] [2021-12-14 11:13:42,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:42,223 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:13:42,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:42,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:13:42,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:13:42,224 INFO L87 Difference]: Start difference. First operand 15 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:42,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:42,254 INFO L93 Difference]: Finished difference Result 29 states and 39 transitions. [2021-12-14 11:13:42,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:13:42,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-14 11:13:42,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:42,255 INFO L225 Difference]: With dead ends: 29 [2021-12-14 11:13:42,255 INFO L226 Difference]: Without dead ends: 18 [2021-12-14 11:13:42,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:13:42,256 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 0 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:42,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 62 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:13:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-14 11:13:42,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-14 11:13:42,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2021-12-14 11:13:42,276 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2021-12-14 11:13:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:42,276 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2021-12-14 11:13:42,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:42,277 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2021-12-14 11:13:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 11:13:42,277 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:42,277 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:42,303 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 11:13:42,499 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 [2021-12-14 11:13:42,500 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:42,501 INFO L85 PathProgramCache]: Analyzing trace with hash 178253537, now seen corresponding path program 2 times [2021-12-14 11:13:42,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:42,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674207974] [2021-12-14 11:13:42,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:42,501 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:42,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:42,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 11:13:42,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:42,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674207974] [2021-12-14 11:13:42,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674207974] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:42,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094302432] [2021-12-14 11:13:42,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:13:42,627 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:42,628 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:42,629 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) [2021-12-14 11:13:42,631 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 11:13:42,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-12-14 11:13:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:13:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-14 11:13:42,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:42,943 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 11:13:42,943 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 11:13:42,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094302432] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:13:42,944 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-14 11:13:42,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 12 [2021-12-14 11:13:42,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522237019] [2021-12-14 11:13:42,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:13:42,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:13:42,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:42,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:13:42,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-12-14 11:13:42,946 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:43,078 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2021-12-14 11:13:43,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-14 11:13:43,079 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 11:13:43,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:43,081 INFO L225 Difference]: With dead ends: 43 [2021-12-14 11:13:43,081 INFO L226 Difference]: Without dead ends: 30 [2021-12-14 11:13:43,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-12-14 11:13:43,087 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:43,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 37 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:13:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-14 11:13:43,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 21. [2021-12-14 11:13:43,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 25 transitions. [2021-12-14 11:13:43,099 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 25 transitions. Word has length 16 [2021-12-14 11:13:43,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:43,100 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 25 transitions. [2021-12-14 11:13:43,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,101 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 25 transitions. [2021-12-14 11:13:43,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 11:13:43,103 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:43,103 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:43,129 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 11:13:43,311 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 [2021-12-14 11:13:43,312 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:43,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:43,312 INFO L85 PathProgramCache]: Analyzing trace with hash -631093089, now seen corresponding path program 1 times [2021-12-14 11:13:43,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:43,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375758173] [2021-12-14 11:13:43,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:43,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:43,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 11:13:43,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:43,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375758173] [2021-12-14 11:13:43,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375758173] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:13:43,357 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:13:43,357 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-14 11:13:43,358 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169194706] [2021-12-14 11:13:43,358 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:13:43,358 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-14 11:13:43,358 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:43,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-14 11:13:43,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-14 11:13:43,359 INFO L87 Difference]: Start difference. First operand 21 states and 25 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:43,395 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2021-12-14 11:13:43,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-14 11:13:43,396 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 11:13:43,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:43,396 INFO L225 Difference]: With dead ends: 39 [2021-12-14 11:13:43,396 INFO L226 Difference]: Without dead ends: 28 [2021-12-14 11:13:43,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-14 11:13:43,398 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:43,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 23 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:13:43,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-12-14 11:13:43,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 21. [2021-12-14 11:13:43,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2021-12-14 11:13:43,402 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2021-12-14 11:13:43,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:43,402 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2021-12-14 11:13:43,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,402 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2021-12-14 11:13:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-12-14 11:13:43,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:43,403 INFO L514 BasicCegarLoop]: trace histogram [4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:43,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-14 11:13:43,403 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:43,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:43,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1148926733, now seen corresponding path program 1 times [2021-12-14 11:13:43,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:43,404 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516674999] [2021-12-14 11:13:43,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:43,404 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 11:13:43,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:43,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516674999] [2021-12-14 11:13:43,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516674999] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:43,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389429323] [2021-12-14 11:13:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:43,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:43,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:43,493 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) [2021-12-14 11:13:43,494 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-14 11:13:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:43,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 11:13:43,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:43,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 11:13:43,587 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:43,670 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 11:13:43,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389429323] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:43,672 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:43,672 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-14 11:13:43,672 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227075872] [2021-12-14 11:13:43,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:43,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 11:13:43,673 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 11:13:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 11:13:43,674 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:43,699 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2021-12-14 11:13:43,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 11:13:43,701 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-12-14 11:13:43,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:43,702 INFO L225 Difference]: With dead ends: 41 [2021-12-14 11:13:43,702 INFO L226 Difference]: Without dead ends: 27 [2021-12-14 11:13:43,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 11:13:43,704 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:43,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:13:43,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-12-14 11:13:43,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-12-14 11:13:43,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2021-12-14 11:13:43,714 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 19 [2021-12-14 11:13:43,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:43,714 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2021-12-14 11:13:43,714 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:43,714 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2021-12-14 11:13:43,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-12-14 11:13:43,715 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:43,715 INFO L514 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:43,738 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-14 11:13:43,931 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:43,932 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:43,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:43,932 INFO L85 PathProgramCache]: Analyzing trace with hash 60416787, now seen corresponding path program 2 times [2021-12-14 11:13:43,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:43,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658338562] [2021-12-14 11:13:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:43,933 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 11:13:44,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:44,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658338562] [2021-12-14 11:13:44,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658338562] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:44,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710907646] [2021-12-14 11:13:44,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:13:44,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:44,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:44,079 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) [2021-12-14 11:13:44,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-14 11:13:44,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:13:44,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:13:44,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:13:44,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 11:13:44,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 11:13:44,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710907646] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:44,422 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:44,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-14 11:13:44,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706574442] [2021-12-14 11:13:44,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:44,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 11:13:44,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:44,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 11:13:44,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:13:44,425 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:44,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:44,473 INFO L93 Difference]: Finished difference Result 53 states and 70 transitions. [2021-12-14 11:13:44,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 11:13:44,474 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-12-14 11:13:44,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:44,476 INFO L225 Difference]: With dead ends: 53 [2021-12-14 11:13:44,477 INFO L226 Difference]: Without dead ends: 39 [2021-12-14 11:13:44,477 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:13:44,479 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:44,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:13:44,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-14 11:13:44,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-14 11:13:44,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:44,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2021-12-14 11:13:44,483 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 25 [2021-12-14 11:13:44,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:44,484 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2021-12-14 11:13:44,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.48) internal successors, (37), 25 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:44,484 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2021-12-14 11:13:44,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 11:13:44,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:44,485 INFO L514 BasicCegarLoop]: trace histogram [22, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:44,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-14 11:13:44,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:44,691 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:44,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:44,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1151281325, now seen corresponding path program 3 times [2021-12-14 11:13:44,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:44,692 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849328101] [2021-12-14 11:13:44,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:44,692 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:44,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 11:13:45,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:45,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849328101] [2021-12-14 11:13:45,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849328101] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:45,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43025535] [2021-12-14 11:13:45,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:13:45,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:45,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:45,062 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) [2021-12-14 11:13:45,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-14 11:13:45,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 11:13:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:13:45,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-14 11:13:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:45,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 10 treesize of output 8 [2021-12-14 11:13:45,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2021-12-14 11:13:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-14 11:13:45,548 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:45,668 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 11:13:45,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 82 treesize of output 78 [2021-12-14 11:13:45,704 INFO L354 Elim1Store]: treesize reduction 12, result has 63.6 percent of original size [2021-12-14 11:13:45,705 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 90 treesize of output 90 [2021-12-14 11:13:45,760 INFO L354 Elim1Store]: treesize reduction 7, result has 41.7 percent of original size [2021-12-14 11:13:45,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 18 [2021-12-14 11:13:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-14 11:13:46,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43025535] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:46,018 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:46,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 6, 7] total 33 [2021-12-14 11:13:46,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139178837] [2021-12-14 11:13:46,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:46,020 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-12-14 11:13:46,020 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:46,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-12-14 11:13:46,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2021-12-14 11:13:46,022 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:46,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:46,642 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2021-12-14 11:13:46,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-12-14 11:13:46,643 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-12-14 11:13:46,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:46,644 INFO L225 Difference]: With dead ends: 62 [2021-12-14 11:13:46,644 INFO L226 Difference]: Without dead ends: 48 [2021-12-14 11:13:46,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=988, Invalid=2318, Unknown=0, NotChecked=0, Total=3306 [2021-12-14 11:13:46,646 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 31 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:46,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 79 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:13:46,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-12-14 11:13:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2021-12-14 11:13:46,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:46,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2021-12-14 11:13:46,656 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 37 [2021-12-14 11:13:46,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:46,656 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2021-12-14 11:13:46,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.878787878787879) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2021-12-14 11:13:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-14 11:13:46,659 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:46,659 INFO L514 BasicCegarLoop]: trace histogram [23, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:46,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-14 11:13:46,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:46,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:46,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:46,864 INFO L85 PathProgramCache]: Analyzing trace with hash -1049039198, now seen corresponding path program 1 times [2021-12-14 11:13:46,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:46,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836751593] [2021-12-14 11:13:46,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:46,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:46,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:13:47,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836751593] [2021-12-14 11:13:47,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836751593] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:47,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056380837] [2021-12-14 11:13:47,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:47,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:47,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:47,195 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) [2021-12-14 11:13:47,199 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-14 11:13:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-14 11:13:47,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:13:47,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:48,097 INFO L134 CoverageAnalysis]: Checked inductivity of 283 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:13:48,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056380837] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:48,097 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:48,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 51 [2021-12-14 11:13:48,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909326090] [2021-12-14 11:13:48,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:48,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-12-14 11:13:48,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:48,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-12-14 11:13:48,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 11:13:48,100 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:48,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:48,162 INFO L93 Difference]: Finished difference Result 87 states and 117 transitions. [2021-12-14 11:13:48,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-12-14 11:13:48,163 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-12-14 11:13:48,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:48,164 INFO L225 Difference]: With dead ends: 87 [2021-12-14 11:13:48,164 INFO L226 Difference]: Without dead ends: 69 [2021-12-14 11:13:48,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-12-14 11:13:48,166 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:48,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:13:48,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-12-14 11:13:48,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-12-14 11:13:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:48,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2021-12-14 11:13:48,180 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 43 [2021-12-14 11:13:48,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:48,181 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2021-12-14 11:13:48,181 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2745098039215685) internal successors, (65), 51 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:48,182 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2021-12-14 11:13:48,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-12-14 11:13:48,187 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:48,187 INFO L514 BasicCegarLoop]: trace histogram [48, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:48,213 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-14 11:13:48,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:48,411 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:48,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:48,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1575725789, now seen corresponding path program 2 times [2021-12-14 11:13:48,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:48,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237652020] [2021-12-14 11:13:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:48,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:48,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:49,493 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:13:49,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:49,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237652020] [2021-12-14 11:13:49,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237652020] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:49,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639178896] [2021-12-14 11:13:49,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:13:49,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:49,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:49,500 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) [2021-12-14 11:13:49,501 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-14 11:13:49,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:13:49,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:13:49,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 536 conjuncts, 50 conjunts are in the unsatisfiable core [2021-12-14 11:13:49,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:49,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:13:49,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:52,150 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:13:52,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639178896] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:52,151 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:52,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 101 [2021-12-14 11:13:52,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396556027] [2021-12-14 11:13:52,151 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:52,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-12-14 11:13:52,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:52,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-12-14 11:13:52,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-14 11:13:52,159 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:13:52,309 INFO L93 Difference]: Finished difference Result 137 states and 192 transitions. [2021-12-14 11:13:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-12-14 11:13:52,309 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-12-14 11:13:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:13:52,311 INFO L225 Difference]: With dead ends: 137 [2021-12-14 11:13:52,311 INFO L226 Difference]: Without dead ends: 119 [2021-12-14 11:13:52,314 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-12-14 11:13:52,315 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:13:52,315 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:13:52,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-12-14 11:13:52,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2021-12-14 11:13:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0338983050847457) internal successors, (122), 118 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:52,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2021-12-14 11:13:52,326 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 68 [2021-12-14 11:13:52,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:13:52,327 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2021-12-14 11:13:52,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:13:52,327 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2021-12-14 11:13:52,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-12-14 11:13:52,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:13:52,328 INFO L514 BasicCegarLoop]: trace histogram [98, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:13:52,357 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-14 11:13:52,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:52,552 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:13:52,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:13:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash -491377027, now seen corresponding path program 3 times [2021-12-14 11:13:52,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:13:52,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461833397] [2021-12-14 11:13:52,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:13:52,553 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:13:52,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:13:55,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-14 11:13:55,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:13:55,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461833397] [2021-12-14 11:13:55,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461833397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:13:55,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301438688] [2021-12-14 11:13:55,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:13:55,808 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:13:55,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:13:55,809 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) [2021-12-14 11:13:55,810 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-14 11:13:55,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-14 11:13:55,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:13:55,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-14 11:13:55,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:13:56,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2021-12-14 11:13:56,413 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:13:56,577 INFO L354 Elim1Store]: treesize reduction 9, result has 35.7 percent of original size [2021-12-14 11:13:56,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 13 [2021-12-14 11:13:56,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4858 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 4851 trivial. 0 not checked. [2021-12-14 11:13:56,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301438688] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:13:56,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:13:56,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 9, 9] total 111 [2021-12-14 11:13:56,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290718600] [2021-12-14 11:13:56,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:13:56,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-12-14 11:13:56,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:13:56,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-12-14 11:13:56,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5080, Invalid=7130, Unknown=0, NotChecked=0, Total=12210 [2021-12-14 11:13:56,774 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand has 111 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 111 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:14:01,027 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2021-12-14 11:14:01,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-12-14 11:14:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 111 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-12-14 11:14:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:14:01,029 INFO L225 Difference]: With dead ends: 159 [2021-12-14 11:14:01,029 INFO L226 Difference]: Without dead ends: 131 [2021-12-14 11:14:01,034 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 225 SyntacticMatches, 1 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6650 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=15213, Invalid=30797, Unknown=0, NotChecked=0, Total=46010 [2021-12-14 11:14:01,035 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 28 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:14:01,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 105 Invalid, 416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:14:01,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-12-14 11:14:01,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 123. [2021-12-14 11:14:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0327868852459017) internal successors, (126), 122 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2021-12-14 11:14:01,058 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 118 [2021-12-14 11:14:01,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:14:01,059 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2021-12-14 11:14:01,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.2702702702702702) internal successors, (141), 111 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2021-12-14 11:14:01,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-12-14 11:14:01,060 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:14:01,060 INFO L514 BasicCegarLoop]: trace histogram [99, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:14:01,080 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-12-14 11:14:01,271 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,SelfDestructingSolverStorable9 [2021-12-14 11:14:01,272 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:14:01,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:14:01,272 INFO L85 PathProgramCache]: Analyzing trace with hash 730991946, now seen corresponding path program 4 times [2021-12-14 11:14:01,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:14:01,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064678031] [2021-12-14 11:14:01,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:01,273 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:14:01,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:04,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 11:14:04,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:14:04,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064678031] [2021-12-14 11:14:04,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064678031] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:14:04,571 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181356849] [2021-12-14 11:14:04,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:14:04,571 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:04,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:14:04,572 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) [2021-12-14 11:14:04,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-14 11:14:04,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:14:04,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:14:04,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 1007 conjuncts, 101 conjunts are in the unsatisfiable core [2021-12-14 11:14:04,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:14:05,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 11:14:05,075 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:14:14,147 INFO L134 CoverageAnalysis]: Checked inductivity of 4963 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 11:14:14,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181356849] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:14:14,148 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:14:14,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102, 102] total 203 [2021-12-14 11:14:14,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104515638] [2021-12-14 11:14:14,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:14:14,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2021-12-14 11:14:14,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:14:14,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2021-12-14 11:14:14,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-14 11:14:14,157 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:14,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:14:14,536 INFO L93 Difference]: Finished difference Result 245 states and 351 transitions. [2021-12-14 11:14:14,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 202 states. [2021-12-14 11:14:14,537 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 122 [2021-12-14 11:14:14,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:14:14,538 INFO L225 Difference]: With dead ends: 245 [2021-12-14 11:14:14,538 INFO L226 Difference]: Without dead ends: 224 [2021-12-14 11:14:14,541 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=20503, Invalid=20503, Unknown=0, NotChecked=0, Total=41006 [2021-12-14 11:14:14,541 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:14:14,542 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 58 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:14:14,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-14 11:14:14,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-12-14 11:14:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 223 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 227 transitions. [2021-12-14 11:14:14,555 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 227 transitions. Word has length 122 [2021-12-14 11:14:14,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:14:14,556 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 227 transitions. [2021-12-14 11:14:14,556 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.0689655172413792) internal successors, (217), 203 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:14,556 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 227 transitions. [2021-12-14 11:14:14,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2021-12-14 11:14:14,558 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:14:14,559 INFO L514 BasicCegarLoop]: trace histogram [200, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:14:14,582 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-12-14 11:14:14,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:14,772 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:14:14,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:14:14,772 INFO L85 PathProgramCache]: Analyzing trace with hash -464397329, now seen corresponding path program 5 times [2021-12-14 11:14:14,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:14:14,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818721426] [2021-12-14 11:14:14,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:14,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:14:15,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:26,823 INFO L134 CoverageAnalysis]: Checked inductivity of 20113 backedges. 0 proven. 20100 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-12-14 11:14:26,823 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:14:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818721426] [2021-12-14 11:14:26,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818721426] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:14:26,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956896321] [2021-12-14 11:14:26,823 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:14:26,824 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:26,824 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:14:26,825 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) [2021-12-14 11:14:26,825 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process