./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_vector_difference_ground.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_vector_difference_ground.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 7263b2c7ab28b481620789bcaa79c3e966cab937e9920a12d1160d17415db571 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 11:14:42,128 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 11:14:42,130 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 11:14:42,182 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 11:14:42,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 11:14:42,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 11:14:42,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 11:14:42,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 11:14:42,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 11:14:42,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 11:14:42,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 11:14:42,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 11:14:42,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 11:14:42,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 11:14:42,201 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 11:14:42,202 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 11:14:42,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 11:14:42,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 11:14:42,205 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 11:14:42,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 11:14:42,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 11:14:42,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 11:14:42,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 11:14:42,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 11:14:42,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 11:14:42,212 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 11:14:42,213 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 11:14:42,213 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 11:14:42,214 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 11:14:42,215 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 11:14:42,215 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 11:14:42,216 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 11:14:42,216 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 11:14:42,217 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 11:14:42,218 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 11:14:42,218 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 11:14:42,219 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 11:14:42,219 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 11:14:42,220 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 11:14:42,220 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 11:14:42,221 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 11:14:42,222 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 11:14:42,255 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 11:14:42,258 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 11:14:42,259 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 11:14:42,259 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 11:14:42,260 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 11:14:42,260 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 11:14:42,260 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 11:14:42,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 11:14:42,261 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 11:14:42,261 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 11:14:42,262 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 11:14:42,262 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 11:14:42,262 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 11:14:42,262 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 11:14:42,263 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 11:14:42,263 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 11:14:42,263 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 11:14:42,263 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 11:14:42,263 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 11:14:42,264 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 11:14:42,265 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 11:14:42,265 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 11:14:42,266 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 11:14:42,266 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 11:14:42,266 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:14:42,266 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 11:14:42,266 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 11:14:42,267 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 11:14:42,267 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 11:14:42,267 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 11:14:42,267 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 11:14:42,267 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 11:14:42,267 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 11:14:42,268 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 11:14:42,268 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7263b2c7ab28b481620789bcaa79c3e966cab937e9920a12d1160d17415db571 [2021-12-14 11:14:42,497 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 11:14:42,513 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 11:14:42,514 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 11:14:42,515 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 11:14:42,516 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 11:14:42,516 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_vector_difference_ground.i [2021-12-14 11:14:42,574 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fa389122/ec797f6cc16f4751807982b09076014a/FLAG6131aaf9c [2021-12-14 11:14:42,915 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 11:14:42,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_vector_difference_ground.i [2021-12-14 11:14:42,925 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fa389122/ec797f6cc16f4751807982b09076014a/FLAG6131aaf9c [2021-12-14 11:14:43,324 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5fa389122/ec797f6cc16f4751807982b09076014a [2021-12-14 11:14:43,326 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 11:14:43,327 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 11:14:43,328 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 11:14:43,328 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 11:14:43,331 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 11:14:43,332 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,332 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f47e280 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43, skipping insertion in model container [2021-12-14 11:14:43,333 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,338 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 11:14:43,348 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 11:14:43,481 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_vector_difference_ground.i[826,839] [2021-12-14 11:14:43,503 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:14:43,509 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 11:14:43,524 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_vector_difference_ground.i[826,839] [2021-12-14 11:14:43,532 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 11:14:43,541 INFO L208 MainTranslator]: Completed translation [2021-12-14 11:14:43,542 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43 WrapperNode [2021-12-14 11:14:43,542 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 11:14:43,543 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 11:14:43,543 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 11:14:43,543 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 11:14:43,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,552 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,565 INFO L137 Inliner]: procedures = 16, calls = 24, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 73 [2021-12-14 11:14:43,566 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 11:14:43,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 11:14:43,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 11:14:43,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 11:14:43,573 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,573 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,575 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,575 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,580 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,583 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,584 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,585 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 11:14:43,586 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 11:14:43,586 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 11:14:43,586 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 11:14:43,587 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (1/1) ... [2021-12-14 11:14:43,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 11:14:43,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:14:43,612 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 11:14:43,613 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 11:14:43,637 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 11:14:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 11:14:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 11:14:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-14 11:14:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 11:14:43,638 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 11:14:43,638 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-14 11:14:43,639 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 11:14:43,688 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 11:14:43,689 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 11:14:43,789 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 11:14:43,794 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 11:14:43,794 INFO L301 CfgBuilder]: Removed 3 assume(true) statements. [2021-12-14 11:14:43,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:14:43 BoogieIcfgContainer [2021-12-14 11:14:43,796 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 11:14:43,797 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 11:14:43,797 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 11:14:43,803 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 11:14:43,806 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 11:14:43" (1/3) ... [2021-12-14 11:14:43,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7a8875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:14:43, skipping insertion in model container [2021-12-14 11:14:43,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 11:14:43" (2/3) ... [2021-12-14 11:14:43,807 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b7a8875 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 11:14:43, skipping insertion in model container [2021-12-14 11:14:43,807 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 11:14:43" (3/3) ... [2021-12-14 11:14:43,808 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_vector_difference_ground.i [2021-12-14 11:14:43,811 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 11:14:43,811 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 11:14:43,841 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 11:14:43,846 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 11:14:43,846 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 11:14:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 11:14:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-14 11:14:43,860 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:14:43,860 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:14:43,861 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:14:43,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:14:43,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2015557098, now seen corresponding path program 1 times [2021-12-14 11:14:43,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:14:43,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102767804] [2021-12-14 11:14:43,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:43,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:14:43,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:43,990 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 11:14:43,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:14:44,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102767804] [2021-12-14 11:14:44,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102767804] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 11:14:44,017 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 11:14:44,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-14 11:14:44,019 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175426691] [2021-12-14 11:14:44,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 11:14:44,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-14 11:14:44,050 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:14:44,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-14 11:14:44,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-14 11:14:44,098 INFO L87 Difference]: Start difference. First operand has 17 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 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 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 11:14:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:14:44,151 INFO L93 Difference]: Finished difference Result 33 states and 47 transitions. [2021-12-14 11:14:44,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-14 11:14:44,162 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 9 [2021-12-14 11:14:44,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:14:44,169 INFO L225 Difference]: With dead ends: 33 [2021-12-14 11:14:44,169 INFO L226 Difference]: Without dead ends: 16 [2021-12-14 11:14:44,174 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 11:14:44,177 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:14:44,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:14:44,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-12-14 11:14:44,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-12-14 11:14:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:44,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2021-12-14 11:14:44,201 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2021-12-14 11:14:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:14:44,201 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2021-12-14 11:14:44,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 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 11:14:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2021-12-14 11:14:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-14 11:14:44,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:14:44,203 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:14:44,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 11:14:44,203 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:14:44,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:14:44,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1338517781, now seen corresponding path program 1 times [2021-12-14 11:14:44,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:14:44,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098359153] [2021-12-14 11:14:44,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:44,205 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:14:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:44,280 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:14:44,280 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:14:44,280 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098359153] [2021-12-14 11:14:44,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098359153] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:14:44,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167514309] [2021-12-14 11:14:44,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:44,283 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:14:44,284 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 11:14:44,285 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 11:14:44,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:44,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-14 11:14:44,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:14:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:14:44,405 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:14:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 11:14:44,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167514309] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:14:44,442 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:14:44,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-14 11:14:44,443 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135126504] [2021-12-14 11:14:44,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:14:44,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-14 11:14:44,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:14:44,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-14 11:14:44,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-14 11:14:44,445 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 11:14:44,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:14:44,488 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2021-12-14 11:14:44,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-14 11:14:44,489 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-14 11:14:44,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:14:44,490 INFO L225 Difference]: With dead ends: 34 [2021-12-14 11:14:44,490 INFO L226 Difference]: Without dead ends: 24 [2021-12-14 11:14:44,490 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 21 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 11:14:44,492 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 11:14:44,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 11:14:44,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-12-14 11:14:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-12-14 11:14:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 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 11:14:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-12-14 11:14:44,499 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 12 [2021-12-14 11:14:44,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:14:44,500 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-12-14 11:14:44,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 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 11:14:44,500 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-12-14 11:14:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-12-14 11:14:44,501 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:14:44,501 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:14:44,522 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-14 11:14:44,719 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 11:14:44,720 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:14:44,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:14:44,720 INFO L85 PathProgramCache]: Analyzing trace with hash -150327986, now seen corresponding path program 2 times [2021-12-14 11:14:44,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:14:44,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662117967] [2021-12-14 11:14:44,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:44,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:14:44,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:44,837 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 11:14:44,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:14:44,838 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662117967] [2021-12-14 11:14:44,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662117967] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:14:44,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951006488] [2021-12-14 11:14:44,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-14 11:14:44,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:44,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:14:44,843 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 11:14:44,845 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 11:14:44,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-14 11:14:44,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:14:44,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-14 11:14:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:14:45,018 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 11:14:45,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:14:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-14 11:14:45,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951006488] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:14:45,120 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:14:45,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-14 11:14:45,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717642740] [2021-12-14 11:14:45,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:14:45,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-14 11:14:45,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:14:45,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-14 11:14:45,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-14 11:14:45,125 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:45,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:14:45,202 INFO L93 Difference]: Finished difference Result 55 states and 70 transitions. [2021-12-14 11:14:45,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-14 11:14:45,202 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-12-14 11:14:45,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:14:45,203 INFO L225 Difference]: With dead ends: 55 [2021-12-14 11:14:45,203 INFO L226 Difference]: Without dead ends: 42 [2021-12-14 11:14:45,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 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 11:14:45,205 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:14:45,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:14:45,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-12-14 11:14:45,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-12-14 11:14:45,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 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 11:14:45,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-12-14 11:14:45,211 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 21 [2021-12-14 11:14:45,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:14:45,211 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-12-14 11:14:45,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 13 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:45,212 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-12-14 11:14:45,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 11:14:45,212 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:14:45,213 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:14:45,242 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 11:14:45,439 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 11:14:45,440 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:14:45,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:14:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash 887583778, now seen corresponding path program 3 times [2021-12-14 11:14:45,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:14:45,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122674323] [2021-12-14 11:14:45,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:45,441 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:14:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:45,725 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-12-14 11:14:45,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:14:45,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122674323] [2021-12-14 11:14:45,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122674323] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:14:45,727 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896781654] [2021-12-14 11:14:45,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-14 11:14:45,728 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:45,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:14:45,729 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 11:14:45,732 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 11:14:45,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-14 11:14:45,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:14:45,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-14 11:14:45,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:14:46,058 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-14 11:14:46,059 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:14:46,297 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-12-14 11:14:46,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896781654] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:14:46,298 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:14:46,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-14 11:14:46,298 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539228284] [2021-12-14 11:14:46,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:14:46,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-14 11:14:46,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:14:46,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-14 11:14:46,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-14 11:14:46,302 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 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 11:14:46,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:14:46,432 INFO L93 Difference]: Finished difference Result 97 states and 124 transitions. [2021-12-14 11:14:46,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-14 11:14:46,432 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-12-14 11:14:46,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:14:46,433 INFO L225 Difference]: With dead ends: 97 [2021-12-14 11:14:46,433 INFO L226 Difference]: Without dead ends: 78 [2021-12-14 11:14:46,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 66 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 11:14:46,435 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-14 11:14:46,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 36 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-14 11:14:46,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-14 11:14:46,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-12-14 11:14:46,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:46,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2021-12-14 11:14:46,443 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 39 [2021-12-14 11:14:46,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:14:46,444 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2021-12-14 11:14:46,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.32) internal successors, (58), 25 states have internal predecessors, (58), 0 states have call successors, (0), 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 11:14:46,444 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2021-12-14 11:14:46,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-12-14 11:14:46,446 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:14:46,446 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:14:46,471 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 11:14:46,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:46,660 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:14:46,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:14:46,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1865987530, now seen corresponding path program 4 times [2021-12-14 11:14:46,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:14:46,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631966136] [2021-12-14 11:14:46,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:46,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:14:46,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-14 11:14:47,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:14:47,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631966136] [2021-12-14 11:14:47,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631966136] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:14:47,099 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558683782] [2021-12-14 11:14:47,099 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-14 11:14:47,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:47,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:14:47,101 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 11:14:47,116 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 11:14:47,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-14 11:14:47,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-14 11:14:47,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-14 11:14:47,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 11:14:47,430 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-14 11:14:47,430 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 11:14:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 737 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-12-14 11:14:48,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558683782] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-14 11:14:48,145 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-14 11:14:48,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-14 11:14:48,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810538624] [2021-12-14 11:14:48,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-14 11:14:48,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-14 11:14:48,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 11:14:48,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-14 11:14:48,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 11:14:48,148 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 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 11:14:48,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 11:14:48,423 INFO L93 Difference]: Finished difference Result 181 states and 232 transitions. [2021-12-14 11:14:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-14 11:14:48,423 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 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 75 [2021-12-14 11:14:48,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 11:14:48,424 INFO L225 Difference]: With dead ends: 181 [2021-12-14 11:14:48,425 INFO L226 Difference]: Without dead ends: 150 [2021-12-14 11:14:48,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-14 11:14:48,426 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 11:14:48,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 52 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-14 11:14:48,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-12-14 11:14:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2021-12-14 11:14:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 11:14:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2021-12-14 11:14:48,437 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 75 [2021-12-14 11:14:48,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 11:14:48,438 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2021-12-14 11:14:48,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.1020408163265305) internal successors, (103), 49 states have internal predecessors, (103), 0 states have call successors, (0), 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 11:14:48,438 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2021-12-14 11:14:48,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-12-14 11:14:48,442 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 11:14:48,442 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 11:14:48,469 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-14 11:14:48,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:48,668 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 11:14:48,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 11:14:48,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1455093478, now seen corresponding path program 5 times [2021-12-14 11:14:48,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 11:14:48,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727665576] [2021-12-14 11:14:48,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 11:14:48,669 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 11:14:48,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 11:14:49,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3197 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 1081 trivial. 0 not checked. [2021-12-14 11:14:49,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 11:14:49,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727665576] [2021-12-14 11:14:49,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1727665576] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 11:14:49,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024138691] [2021-12-14 11:14:49,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-14 11:14:49,687 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 11:14:49,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 11:14:49,688 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 11:14:49,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process