./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test_while_int.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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/ldv-regression/test_while_int.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 f3aef2cb0383bc51116609eb7d5762e5307f0f48dd90c41df34c9f2444e8da09 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:48:23,120 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:48:23,122 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:48:23,152 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:48:23,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:48:23,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:48:23,156 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:48:23,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:48:23,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:48:23,166 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:48:23,167 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:48:23,170 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:48:23,170 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:48:23,172 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:48:23,173 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:48:23,175 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:48:23,175 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:48:23,176 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:48:23,178 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:48:23,182 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:48:23,183 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:48:23,184 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:48:23,184 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:48:23,186 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:48:23,191 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:48:23,191 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:48:23,191 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:48:23,193 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:48:23,193 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:48:23,194 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:48:23,194 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:48:23,194 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:48:23,196 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:48:23,196 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:48:23,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:48:23,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:48:23,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:48:23,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:48:23,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:48:23,199 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:48:23,199 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:48:23,203 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:48:23,239 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:48:23,240 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:48:23,241 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:48:23,241 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:48:23,241 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:48:23,242 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:48:23,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:48:23,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:48:23,243 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:48:23,243 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:48:23,244 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:48:23,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:48:23,244 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:48:23,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:48:23,245 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:48:23,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:48:23,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:48:23,245 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:48:23,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:48:23,245 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:48:23,246 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:48:23,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:48:23,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:48:23,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:48:23,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:48:23,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:48:23,246 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:48:23,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:48:23,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:48:23,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:48:23,247 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:48:23,247 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:48:23,248 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:48:23,248 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3aef2cb0383bc51116609eb7d5762e5307f0f48dd90c41df34c9f2444e8da09 [2021-12-27 23:48:23,505 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:48:23,521 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:48:23,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:48:23,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:48:23,526 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:48:23,527 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test_while_int.i [2021-12-27 23:48:23,579 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c5ce7b6/f0cc0245979d4b53a546e0cf414f41ff/FLAG597b831e1 [2021-12-27 23:48:23,949 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:48:23,950 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test_while_int.i [2021-12-27 23:48:23,953 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c5ce7b6/f0cc0245979d4b53a546e0cf414f41ff/FLAG597b831e1 [2021-12-27 23:48:23,964 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/47c5ce7b6/f0cc0245979d4b53a546e0cf414f41ff [2021-12-27 23:48:23,966 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:48:23,967 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:48:23,968 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:48:23,968 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:48:23,971 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:48:23,971 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:48:23" (1/1) ... [2021-12-27 23:48:23,972 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55c3c56f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:23, skipping insertion in model container [2021-12-27 23:48:23,972 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:48:23" (1/1) ... [2021-12-27 23:48:23,976 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:48:23,984 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:48:24,065 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/ldv-regression/test_while_int.i[296,309] [2021-12-27 23:48:24,076 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:48:24,083 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:48:24,092 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/ldv-regression/test_while_int.i[296,309] [2021-12-27 23:48:24,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:48:24,109 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:48:24,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24 WrapperNode [2021-12-27 23:48:24,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:48:24,110 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:48:24,110 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:48:24,111 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:48:24,115 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,121 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,164 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 27 [2021-12-27 23:48:24,164 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:48:24,165 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:48:24,165 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:48:24,165 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:48:24,170 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,170 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,172 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,181 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:48:24,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:48:24,184 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:48:24,184 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:48:24,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (1/1) ... [2021-12-27 23:48:24,190 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:48:24,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:48:24,208 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) [2021-12-27 23:48:24,230 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 [2021-12-27 23:48:24,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:48:24,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:48:24,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:48:24,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:48:24,283 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:48:24,284 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:48:24,385 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:48:24,389 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:48:24,390 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-27 23:48:24,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:48:24 BoogieIcfgContainer [2021-12-27 23:48:24,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:48:24,393 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:48:24,393 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:48:24,395 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:48:24,395 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:48:23" (1/3) ... [2021-12-27 23:48:24,396 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5bc7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:48:24, skipping insertion in model container [2021-12-27 23:48:24,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:48:24" (2/3) ... [2021-12-27 23:48:24,397 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b5bc7cc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:48:24, skipping insertion in model container [2021-12-27 23:48:24,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:48:24" (3/3) ... [2021-12-27 23:48:24,398 INFO L111 eAbstractionObserver]: Analyzing ICFG test_while_int.i [2021-12-27 23:48:24,404 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:48:24,404 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:48:24,446 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:48:24,452 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 [2021-12-27 23:48:24,453 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:48:24,465 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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) [2021-12-27 23:48:24,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-12-27 23:48:24,477 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:24,477 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-12-27 23:48:24,478 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:24,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:24,483 INFO L85 PathProgramCache]: Analyzing trace with hash 28699818, now seen corresponding path program 1 times [2021-12-27 23:48:24,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:24,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536999444] [2021-12-27 23:48:24,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:24,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:24,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:24,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:24,666 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536999444] [2021-12-27 23:48:24,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536999444] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:48:24,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:48:24,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 23:48:24,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091038759] [2021-12-27 23:48:24,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:48:24,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:48:24,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:48:24,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:48:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:48:24,690 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-12-27 23:48:24,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:48:24,709 INFO L93 Difference]: Finished difference Result 23 states and 30 transitions. [2021-12-27 23:48:24,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:48:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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 5 [2021-12-27 23:48:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:48:24,729 INFO L225 Difference]: With dead ends: 23 [2021-12-27 23:48:24,729 INFO L226 Difference]: Without dead ends: 9 [2021-12-27 23:48:24,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:48:24,734 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 6 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 20 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 [2021-12-27 23:48:24,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 20 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:48:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-12-27 23:48:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-12-27 23:48:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 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) [2021-12-27 23:48:24,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-12-27 23:48:24,754 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 5 [2021-12-27 23:48:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:48:24,754 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-12-27 23:48:24,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 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) [2021-12-27 23:48:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-12-27 23:48:24,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-27 23:48:24,755 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:24,755 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2021-12-27 23:48:24,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:48:24,756 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash 296099132, now seen corresponding path program 1 times [2021-12-27 23:48:24,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:24,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271307458] [2021-12-27 23:48:24,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:24,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:24,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:48:24,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271307458] [2021-12-27 23:48:24,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271307458] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:48:24,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748336054] [2021-12-27 23:48:24,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:24,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:48:24,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:48:24,848 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) [2021-12-27 23:48:24,867 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 23:48:24,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:48:24,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-27 23:48:24,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:48:24,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:24,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:48:25,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:48:25,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748336054] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:48:25,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:48:25,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2021-12-27 23:48:25,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370529362] [2021-12-27 23:48:25,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:48:25,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-27 23:48:25,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:48:25,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-27 23:48:25,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-12-27 23:48:25,034 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:25,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:48:25,082 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2021-12-27 23:48:25,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 23:48:25,083 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-27 23:48:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:48:25,083 INFO L225 Difference]: With dead ends: 24 [2021-12-27 23:48:25,083 INFO L226 Difference]: Without dead ends: 22 [2021-12-27 23:48:25,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-12-27 23:48:25,085 INFO L933 BasicCegarLoop]: 6 mSDtfsCounter, 18 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:48:25,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 35 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:48:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-27 23:48:25,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2021-12-27 23:48:25,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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) [2021-12-27 23:48:25,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-27 23:48:25,089 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 8 [2021-12-27 23:48:25,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:48:25,089 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-27 23:48:25,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:48:25,089 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-27 23:48:25,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-27 23:48:25,090 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:48:25,090 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2021-12-27 23:48:25,111 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 23:48:25,299 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 [2021-12-27 23:48:25,299 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:48:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:48:25,301 INFO L85 PathProgramCache]: Analyzing trace with hash -775271574, now seen corresponding path program 2 times [2021-12-27 23:48:25,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:48:25,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733358300] [2021-12-27 23:48:25,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:48:25,302 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:48:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:48:25,320 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-27 23:48:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:48:25,336 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-27 23:48:25,336 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-27 23:48:25,337 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 23:48:25,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 23:48:25,340 INFO L732 BasicCegarLoop]: Path program histogram: [2, 1] [2021-12-27 23:48:25,342 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 23:48:25,354 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 11:48:25 BoogieIcfgContainer [2021-12-27 23:48:25,354 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 23:48:25,355 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 23:48:25,355 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 23:48:25,355 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 23:48:25,356 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:48:24" (3/4) ... [2021-12-27 23:48:25,357 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-27 23:48:25,378 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-27 23:48:25,378 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 23:48:25,379 INFO L158 Benchmark]: Toolchain (without parser) took 1412.01ms. Allocated memory was 52.4MB in the beginning and 71.3MB in the end (delta: 18.9MB). Free memory was 30.2MB in the beginning and 42.0MB in the end (delta: -11.8MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2021-12-27 23:48:25,379 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory was 34.5MB in the beginning and 34.4MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:48:25,384 INFO L158 Benchmark]: CACSL2BoogieTranslator took 141.41ms. Allocated memory is still 52.4MB. Free memory was 29.9MB in the beginning and 34.0MB in the end (delta: -4.1MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2021-12-27 23:48:25,384 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.13ms. Allocated memory was 52.4MB in the beginning and 71.3MB in the end (delta: 18.9MB). Free memory was 33.9MB in the beginning and 55.6MB in the end (delta: -21.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-27 23:48:25,385 INFO L158 Benchmark]: Boogie Preprocessor took 17.29ms. Allocated memory is still 71.3MB. Free memory was 55.6MB in the beginning and 54.7MB in the end (delta: 925.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:48:25,385 INFO L158 Benchmark]: RCFGBuilder took 208.51ms. Allocated memory is still 71.3MB. Free memory was 54.7MB in the beginning and 46.5MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-27 23:48:25,385 INFO L158 Benchmark]: TraceAbstraction took 961.57ms. Allocated memory is still 71.3MB. Free memory was 46.0MB in the beginning and 43.8MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-27 23:48:25,386 INFO L158 Benchmark]: Witness Printer took 23.17ms. Allocated memory is still 71.3MB. Free memory was 43.8MB in the beginning and 42.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:48:25,387 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 52.4MB. Free memory was 34.5MB in the beginning and 34.4MB in the end (delta: 38.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 141.41ms. Allocated memory is still 52.4MB. Free memory was 29.9MB in the beginning and 34.0MB in the end (delta: -4.1MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.13ms. Allocated memory was 52.4MB in the beginning and 71.3MB in the end (delta: 18.9MB). Free memory was 33.9MB in the beginning and 55.6MB in the end (delta: -21.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.29ms. Allocated memory is still 71.3MB. Free memory was 55.6MB in the beginning and 54.7MB in the end (delta: 925.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 208.51ms. Allocated memory is still 71.3MB. Free memory was 54.7MB in the beginning and 46.5MB in the end (delta: 8.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * TraceAbstraction took 961.57ms. Allocated memory is still 71.3MB. Free memory was 46.0MB in the beginning and 43.8MB in the end (delta: 2.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Witness Printer took 23.17ms. Allocated memory is still 71.3MB. Free memory was 43.8MB in the beginning and 42.0MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int i=0; VAL [i=0] [L26] COND TRUE i<5 [L27] i++ [L31] CALL check_error(i!=3) [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L31] RET check_error(i!=3) [L26] COND TRUE i<5 [L27] i++ [L31] CALL check_error(i!=3) [L20] (b) ? (0) : __blast_assert () VAL [\old(b)=1, b=1] [L31] RET check_error(i!=3) [L26] COND TRUE i<5 [L27] i++ [L31] CALL check_error(i!=3) [L20] (b) ? (0) : __blast_assert () [L20] CALL __blast_assert () [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.9s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24 mSDsluCounter, 55 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 39 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 34 IncrementalHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 16 mSDtfsCounter, 34 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=2, InterpolantAutomatonStates: 13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 25 ConstructedInterpolants, 0 QuantifiedInterpolants, 67 SizeOfPredicates, 2 NumberOfNonLiveVariables, 46 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 0/6 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-27 23:48:25,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE