./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/array-examples/standard_init9_ground-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/array-examples/standard_init9_ground-1.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 a2ffc42929e6643779522a313bb51bbe0e05198e9120e04b929ee1d97b6851bc --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 09:47:38,165 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 09:47:38,167 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 09:47:38,200 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 09:47:38,210 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 09:47:38,215 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 09:47:38,216 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 09:47:38,218 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 09:47:38,219 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 09:47:38,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 09:47:38,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 09:47:38,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 09:47:38,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 09:47:38,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 09:47:38,224 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 09:47:38,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 09:47:38,226 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 09:47:38,227 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 09:47:38,229 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 09:47:38,230 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 09:47:38,231 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 09:47:38,232 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 09:47:38,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 09:47:38,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 09:47:38,237 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 09:47:38,238 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 09:47:38,238 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 09:47:38,239 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 09:47:38,242 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 09:47:38,243 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 09:47:38,244 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 09:47:38,244 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 09:47:38,245 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 09:47:38,246 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 09:47:38,247 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 09:47:38,248 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 09:47:38,249 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 09:47:38,250 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 09:47:38,250 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 09:47:38,252 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 09:47:38,253 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 09:47:38,254 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 09:47:38,284 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 09:47:38,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 09:47:38,284 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 09:47:38,285 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 09:47:38,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 09:47:38,285 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 09:47:38,286 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 09:47:38,286 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 09:47:38,286 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 09:47:38,287 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 09:47:38,287 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 09:47:38,287 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 09:47:38,287 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 09:47:38,287 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 09:47:38,287 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 09:47:38,288 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 09:47:38,288 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 09:47:38,288 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 09:47:38,288 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 09:47:38,288 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 09:47:38,289 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 09:47:38,289 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 09:47:38,289 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 09:47:38,289 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 09:47:38,289 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:47:38,290 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 09:47:38,290 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 09:47:38,290 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 09:47:38,290 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 09:47:38,290 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 09:47:38,290 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 09:47:38,291 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 09:47:38,291 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 09:47:38,291 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 09:47:38,291 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a2ffc42929e6643779522a313bb51bbe0e05198e9120e04b929ee1d97b6851bc [2021-12-21 09:47:38,477 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 09:47:38,506 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 09:47:38,509 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 09:47:38,510 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 09:47:38,510 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 09:47:38,511 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-examples/standard_init9_ground-1.i [2021-12-21 09:47:38,577 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bc4a3f9/0c3f1967a53d40c7bb515212a2caa651/FLAG3a311f2b9 [2021-12-21 09:47:39,034 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 09:47:39,034 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-examples/standard_init9_ground-1.i [2021-12-21 09:47:39,044 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bc4a3f9/0c3f1967a53d40c7bb515212a2caa651/FLAG3a311f2b9 [2021-12-21 09:47:39,061 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/54bc4a3f9/0c3f1967a53d40c7bb515212a2caa651 [2021-12-21 09:47:39,064 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 09:47:39,066 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 09:47:39,069 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 09:47:39,069 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 09:47:39,072 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 09:47:39,073 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,073 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@241bdb97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39, skipping insertion in model container [2021-12-21 09:47:39,074 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,079 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 09:47:39,094 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 09:47:39,207 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_init9_ground-1.i[816,829] [2021-12-21 09:47:39,248 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:47:39,255 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 09:47:39,269 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_init9_ground-1.i[816,829] [2021-12-21 09:47:39,293 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 09:47:39,304 INFO L208 MainTranslator]: Completed translation [2021-12-21 09:47:39,306 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39 WrapperNode [2021-12-21 09:47:39,306 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 09:47:39,307 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 09:47:39,307 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 09:47:39,307 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 09:47:39,313 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,326 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,348 INFO L137 Inliner]: procedures = 15, calls = 20, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 96 [2021-12-21 09:47:39,348 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 09:47:39,349 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 09:47:39,350 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 09:47:39,350 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 09:47:39,356 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,357 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,360 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,361 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,376 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,381 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,386 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 09:47:39,391 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 09:47:39,392 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 09:47:39,392 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 09:47:39,393 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (1/1) ... [2021-12-21 09:47:39,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 09:47:39,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:47:39,418 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 09:47:39,420 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 09:47:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 09:47:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 09:47:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-21 09:47:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 09:47:39,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 09:47:39,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 09:47:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 09:47:39,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-21 09:47:39,498 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 09:47:39,499 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 09:47:39,686 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 09:47:39,691 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 09:47:39,691 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-12-21 09:47:39,693 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:47:39 BoogieIcfgContainer [2021-12-21 09:47:39,694 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 09:47:39,695 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 09:47:39,695 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 09:47:39,702 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 09:47:39,715 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:47:39" (1/3) ... [2021-12-21 09:47:39,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfaa908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:47:39, skipping insertion in model container [2021-12-21 09:47:39,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:47:39" (2/3) ... [2021-12-21 09:47:39,717 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4dfaa908 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:47:39, skipping insertion in model container [2021-12-21 09:47:39,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:47:39" (3/3) ... [2021-12-21 09:47:39,718 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init9_ground-1.i [2021-12-21 09:47:39,722 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 09:47:39,723 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 09:47:39,790 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 09:47:39,806 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 09:47:39,809 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 09:47:39,822 INFO L276 IsEmpty]: Start isEmpty. Operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 29 states have internal predecessors, (50), 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) [2021-12-21 09:47:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-12-21 09:47:39,837 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:47:39,838 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:47:39,838 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:47:39,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:47:39,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1478943884, now seen corresponding path program 1 times [2021-12-21 09:47:39,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:47:39,857 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966860150] [2021-12-21 09:47:39,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:47:39,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:47:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:47:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 09:47:40,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:47:40,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966860150] [2021-12-21 09:47:40,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966860150] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 09:47:40,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 09:47:40,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-21 09:47:40,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670044213] [2021-12-21 09:47:40,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 09:47:40,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-21 09:47:40,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:47:40,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-21 09:47:40,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-21 09:47:40,086 INFO L87 Difference]: Start difference. First operand has 30 states, 28 states have (on average 1.7857142857142858) internal successors, (50), 29 states have internal predecessors, (50), 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 7.666666666666667) internal successors, (23), 3 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) [2021-12-21 09:47:40,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:47:40,186 INFO L93 Difference]: Finished difference Result 66 states and 122 transitions. [2021-12-21 09:47:40,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-21 09:47:40,189 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) Word has length 23 [2021-12-21 09:47:40,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:47:40,195 INFO L225 Difference]: With dead ends: 66 [2021-12-21 09:47:40,195 INFO L226 Difference]: Without dead ends: 35 [2021-12-21 09:47:40,198 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 [2021-12-21 09:47:40,202 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:47:40,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:47:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-12-21 09:47:40,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-12-21 09:47:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 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) [2021-12-21 09:47:40,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 44 transitions. [2021-12-21 09:47:40,241 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 44 transitions. Word has length 23 [2021-12-21 09:47:40,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:47:40,241 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 44 transitions. [2021-12-21 09:47:40,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 3 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) [2021-12-21 09:47:40,243 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 44 transitions. [2021-12-21 09:47:40,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-12-21 09:47:40,245 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:47:40,245 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:47:40,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 09:47:40,246 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:47:40,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:47:40,249 INFO L85 PathProgramCache]: Analyzing trace with hash 527193407, now seen corresponding path program 1 times [2021-12-21 09:47:40,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:47:40,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379803554] [2021-12-21 09:47:40,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:47:40,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:47:40,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:47:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 09:47:40,345 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:47:40,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379803554] [2021-12-21 09:47:40,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379803554] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:47:40,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420750282] [2021-12-21 09:47:40,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:47:40,347 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:47:40,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:47:40,352 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:47:40,395 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 09:47:40,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:47:40,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-21 09:47:40,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:47:40,549 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 09:47:40,549 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:47:40,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-21 09:47:40,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420750282] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:47:40,622 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:47:40,622 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2021-12-21 09:47:40,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080022350] [2021-12-21 09:47:40,623 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:47:40,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 09:47:40,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:47:40,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 09:47:40,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:47:40,625 INFO L87 Difference]: Start difference. First operand 35 states and 44 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:47:40,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:47:40,734 INFO L93 Difference]: Finished difference Result 93 states and 137 transitions. [2021-12-21 09:47:40,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-21 09:47:40,735 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-12-21 09:47:40,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:47:40,736 INFO L225 Difference]: With dead ends: 93 [2021-12-21 09:47:40,736 INFO L226 Difference]: Without dead ends: 62 [2021-12-21 09:47:40,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-12-21 09:47:40,738 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-21 09:47:40,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-21 09:47:40,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-12-21 09:47:40,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-12-21 09:47:40,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1639344262295082) internal successors, (71), 61 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:47:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2021-12-21 09:47:40,747 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 32 [2021-12-21 09:47:40,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:47:40,748 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2021-12-21 09:47:40,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:47:40,748 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2021-12-21 09:47:40,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-12-21 09:47:40,750 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:47:40,750 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:47:40,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-21 09:47:40,973 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 [2021-12-21 09:47:40,974 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:47:40,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:47:40,974 INFO L85 PathProgramCache]: Analyzing trace with hash -500879800, now seen corresponding path program 2 times [2021-12-21 09:47:40,974 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:47:40,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519549986] [2021-12-21 09:47:40,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:47:40,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:47:41,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:47:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-21 09:47:41,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:47:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519549986] [2021-12-21 09:47:41,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519549986] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:47:41,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208573055] [2021-12-21 09:47:41,147 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-21 09:47:41,147 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:47:41,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:47:41,148 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:47:41,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-21 09:47:41,264 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-21 09:47:41,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:47:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 09:47:41,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:47:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-21 09:47:41,367 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:47:41,502 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-12-21 09:47:41,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208573055] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:47:41,503 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:47:41,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2021-12-21 09:47:41,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244563126] [2021-12-21 09:47:41,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:47:41,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-12-21 09:47:41,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:47:41,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-12-21 09:47:41,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:47:41,507 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:47:41,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:47:41,758 INFO L93 Difference]: Finished difference Result 171 states and 242 transitions. [2021-12-21 09:47:41,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-21 09:47:41,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-12-21 09:47:41,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:47:41,760 INFO L225 Difference]: With dead ends: 171 [2021-12-21 09:47:41,760 INFO L226 Difference]: Without dead ends: 116 [2021-12-21 09:47:41,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-12-21 09:47:41,762 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 09:47:41,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 50 Invalid, 368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 09:47:41,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-12-21 09:47:41,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 116. [2021-12-21 09:47:41,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0869565217391304) internal successors, (125), 115 states have internal predecessors, (125), 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) [2021-12-21 09:47:41,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-12-21 09:47:41,774 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 59 [2021-12-21 09:47:41,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:47:41,774 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-12-21 09:47:41,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 13 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:47:41,775 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-12-21 09:47:41,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-12-21 09:47:41,778 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:47:41,778 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:47:41,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-21 09:47:41,991 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 [2021-12-21 09:47:41,991 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:47:41,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:47:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -1477001240, now seen corresponding path program 3 times [2021-12-21 09:47:41,992 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:47:41,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659518794] [2021-12-21 09:47:41,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:47:41,992 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:47:42,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:47:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-12-21 09:47:42,300 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:47:42,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659518794] [2021-12-21 09:47:42,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659518794] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:47:42,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004918380] [2021-12-21 09:47:42,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-21 09:47:42,301 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:47:42,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:47:42,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:47:42,304 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-21 09:47:51,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-12-21 09:47:51,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:47:51,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 12 conjunts are in the unsatisfiable core [2021-12-21 09:47:51,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:47:52,237 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-12-21 09:47:52,238 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:47:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 440 trivial. 0 not checked. [2021-12-21 09:47:52,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004918380] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:47:52,593 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:47:52,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2021-12-21 09:47:52,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463212408] [2021-12-21 09:47:52,594 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:47:52,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-21 09:47:52,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:47:52,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-21 09:47:52,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:47:52,598 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 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) [2021-12-21 09:47:53,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:47:53,028 INFO L93 Difference]: Finished difference Result 327 states and 452 transitions. [2021-12-21 09:47:53,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-12-21 09:47:53,030 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 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) Word has length 113 [2021-12-21 09:47:53,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:47:53,035 INFO L225 Difference]: With dead ends: 327 [2021-12-21 09:47:53,035 INFO L226 Difference]: Without dead ends: 224 [2021-12-21 09:47:53,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-12-21 09:47:53,037 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 478 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 748 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 478 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-21 09:47:53,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 74 Invalid, 748 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [478 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-21 09:47:53,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-12-21 09:47:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2021-12-21 09:47:53,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0448430493273542) internal successors, (233), 223 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-21 09:47:53,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2021-12-21 09:47:53,058 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 113 [2021-12-21 09:47:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:47:53,058 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2021-12-21 09:47:53,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.2) internal successors, (80), 25 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) [2021-12-21 09:47:53,059 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2021-12-21 09:47:53,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2021-12-21 09:47:53,064 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:47:53,065 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:47:53,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-21 09:47:53,265 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 [2021-12-21 09:47:53,266 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:47:53,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:47:53,266 INFO L85 PathProgramCache]: Analyzing trace with hash 2038840104, now seen corresponding path program 4 times [2021-12-21 09:47:53,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:47:53,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258639415] [2021-12-21 09:47:53,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:47:53,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:47:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:47:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2021-12-21 09:47:53,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:47:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258639415] [2021-12-21 09:47:53,846 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258639415] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:47:53,846 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816302394] [2021-12-21 09:47:53,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-12-21 09:47:53,846 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:47:53,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:47:53,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:47:53,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-21 09:47:54,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-12-21 09:47:54,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-21 09:47:54,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 1458 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-21 09:47:54,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 09:47:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2021-12-21 09:47:54,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 09:47:55,466 INFO L134 CoverageAnalysis]: Checked inductivity of 2277 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 2024 trivial. 0 not checked. [2021-12-21 09:47:55,466 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816302394] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 09:47:55,466 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 09:47:55,466 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2021-12-21 09:47:55,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714833500] [2021-12-21 09:47:55,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 09:47:55,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-12-21 09:47:55,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 09:47:55,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-12-21 09:47:55,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:47:55,470 INFO L87 Difference]: Start difference. First operand 224 states and 233 transitions. Second operand has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2021-12-21 09:47:56,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 09:47:56,563 INFO L93 Difference]: Finished difference Result 639 states and 872 transitions. [2021-12-21 09:47:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-12-21 09:47:56,564 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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 221 [2021-12-21 09:47:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 09:47:56,566 INFO L225 Difference]: With dead ends: 639 [2021-12-21 09:47:56,566 INFO L226 Difference]: Without dead ends: 440 [2021-12-21 09:47:56,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 465 GetRequests, 418 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-12-21 09:47:56,569 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 1620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 2061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1620 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-12-21 09:47:56,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 2061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1620 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-12-21 09:47:56,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-12-21 09:47:56,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2021-12-21 09:47:56,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 1.0227790432801822) internal successors, (449), 439 states have internal predecessors, (449), 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) [2021-12-21 09:47:56,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 449 transitions. [2021-12-21 09:47:56,598 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 449 transitions. Word has length 221 [2021-12-21 09:47:56,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 09:47:56,599 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 449 transitions. [2021-12-21 09:47:56,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6122448979591837) internal successors, (79), 49 states have internal predecessors, (79), 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) [2021-12-21 09:47:56,599 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 449 transitions. [2021-12-21 09:47:56,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 438 [2021-12-21 09:47:56,605 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 09:47:56,605 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 09:47:56,633 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-21 09:47:56,831 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 [2021-12-21 09:47:56,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 09:47:56,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 09:47:56,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1544458664, now seen corresponding path program 5 times [2021-12-21 09:47:56,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 09:47:56,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181793377] [2021-12-21 09:47:56,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 09:47:56,832 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 09:47:57,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 09:47:58,085 INFO L134 CoverageAnalysis]: Checked inductivity of 9729 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 8648 trivial. 0 not checked. [2021-12-21 09:47:58,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 09:47:58,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181793377] [2021-12-21 09:47:58,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181793377] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 09:47:58,086 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151080170] [2021-12-21 09:47:58,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-12-21 09:47:58,086 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 09:47:58,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 09:47:58,087 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 09:47:58,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process