./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-simple/nested_1b.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 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/loop-simple/nested_1b.c -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 de4c7bf005639409d0c5506b91694c0a93e2905c64b2cd28aafb6e9617d859e5 --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 15:55:24,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 15:55:24,059 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 15:55:24,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 15:55:24,095 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 15:55:24,096 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 15:55:24,099 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 15:55:24,104 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 15:55:24,106 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 15:55:24,112 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 15:55:24,113 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 15:55:24,116 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 15:55:24,116 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 15:55:24,118 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 15:55:24,120 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 15:55:24,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 15:55:24,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 15:55:24,127 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 15:55:24,128 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 15:55:24,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 15:55:24,135 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 15:55:24,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 15:55:24,136 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 15:55:24,137 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 15:55:24,139 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 15:55:24,143 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 15:55:24,144 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 15:55:24,144 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 15:55:24,146 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 15:55:24,146 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 15:55:24,147 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 15:55:24,148 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 15:55:24,149 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 15:55:24,150 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 15:55:24,150 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 15:55:24,151 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 15:55:24,151 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 15:55:24,152 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 15:55:24,152 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 15:55:24,153 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 15:55:24,153 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 15:55:24,155 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 15:55:24,156 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 15:55:24,195 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 15:55:24,196 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 15:55:24,196 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 15:55:24,196 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 15:55:24,197 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 15:55:24,197 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 15:55:24,198 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 15:55:24,198 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 15:55:24,198 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 15:55:24,199 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 15:55:24,200 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 15:55:24,200 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 15:55:24,200 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 15:55:24,200 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 15:55:24,201 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 15:55:24,201 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 15:55:24,201 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 15:55:24,201 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 15:55:24,202 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 15:55:24,202 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 15:55:24,203 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 15:55:24,203 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 15:55:24,203 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 15:55:24,203 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 15:55:24,203 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:55:24,204 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 15:55:24,204 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 15:55:24,204 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 15:55:24,204 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 15:55:24,205 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 15:55:24,205 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 15:55:24,205 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 15:55:24,205 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 15:55:24,205 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de4c7bf005639409d0c5506b91694c0a93e2905c64b2cd28aafb6e9617d859e5 [2022-07-13 15:55:24,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 15:55:24,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 15:55:24,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 15:55:24,490 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 15:55:24,490 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 15:55:24,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loop-simple/nested_1b.c [2022-07-13 15:55:24,557 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e86ca8e85/9df0a7e389b7431585ec69cc453bd7fd/FLAG7587ddd60 [2022-07-13 15:55:24,915 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 15:55:24,916 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loop-simple/nested_1b.c [2022-07-13 15:55:24,920 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e86ca8e85/9df0a7e389b7431585ec69cc453bd7fd/FLAG7587ddd60 [2022-07-13 15:55:24,933 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e86ca8e85/9df0a7e389b7431585ec69cc453bd7fd [2022-07-13 15:55:24,935 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 15:55:24,936 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 15:55:24,938 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 15:55:24,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 15:55:24,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 15:55:24,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:55:24" (1/1) ... [2022-07-13 15:55:24,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@439664f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:24, skipping insertion in model container [2022-07-13 15:55:24,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 03:55:24" (1/1) ... [2022-07-13 15:55:24,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 15:55:24,962 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 15:55:25,103 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/loop-simple/nested_1b.c[674,687] [2022-07-13 15:55:25,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:55:25,118 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 15:55:25,133 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/loop-simple/nested_1b.c[674,687] [2022-07-13 15:55:25,134 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 15:55:25,145 INFO L208 MainTranslator]: Completed translation [2022-07-13 15:55:25,145 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25 WrapperNode [2022-07-13 15:55:25,146 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 15:55:25,147 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 15:55:25,147 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 15:55:25,147 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 15:55:25,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,164 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,185 INFO L137 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 23 [2022-07-13 15:55:25,185 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 15:55:25,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 15:55:25,189 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 15:55:25,189 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 15:55:25,195 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,196 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,197 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,198 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,201 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,205 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,206 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,211 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 15:55:25,212 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 15:55:25,213 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 15:55:25,213 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 15:55:25,214 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (1/1) ... [2022-07-13 15:55:25,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 15:55:25,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:55:25,240 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) [2022-07-13 15:55:25,245 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 [2022-07-13 15:55:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 15:55:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 15:55:25,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 15:55:25,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 15:55:25,315 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 15:55:25,316 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 15:55:25,370 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 15:55:25,375 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 15:55:25,375 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-13 15:55:25,376 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:55:25 BoogieIcfgContainer [2022-07-13 15:55:25,376 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 15:55:25,378 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 15:55:25,378 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 15:55:25,381 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 15:55:25,381 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 03:55:24" (1/3) ... [2022-07-13 15:55:25,384 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7438b2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:55:25, skipping insertion in model container [2022-07-13 15:55:25,384 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 03:55:25" (2/3) ... [2022-07-13 15:55:25,385 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7438b2ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 03:55:25, skipping insertion in model container [2022-07-13 15:55:25,385 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:55:25" (3/3) ... [2022-07-13 15:55:25,386 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_1b.c [2022-07-13 15:55:25,400 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 15:55:25,400 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 15:55:25,441 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 15:55:25,448 INFO L357 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, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@2b642327, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@a1f82e5 [2022-07-13 15:55:25,448 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-13 15:55:25,452 INFO L276 IsEmpty]: Start isEmpty. Operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-13 15:55:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-07-13 15:55:25,460 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:55:25,461 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-07-13 15:55:25,462 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:55:25,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:55:25,468 INFO L85 PathProgramCache]: Analyzing trace with hash 28696998, now seen corresponding path program 1 times [2022-07-13 15:55:25,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:55:25,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534508418] [2022-07-13 15:55:25,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:55:25,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:55:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:55:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:55:25,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:55:25,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534508418] [2022-07-13 15:55:25,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534508418] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 15:55:25,659 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 15:55:25,660 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-13 15:55:25,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789193648] [2022-07-13 15:55:25,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 15:55:25,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-13 15:55:25,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:55:25,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-13 15:55:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:55:25,701 INFO L87 Difference]: Start difference. First operand has 11 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-07-13 15:55:25,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:55:25,744 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2022-07-13 15:55:25,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-13 15:55:25,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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 [2022-07-13 15:55:25,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:55:25,757 INFO L225 Difference]: With dead ends: 20 [2022-07-13 15:55:25,757 INFO L226 Difference]: Without dead ends: 9 [2022-07-13 15:55:25,760 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-13 15:55:25,763 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:55:25,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 14 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:55:25,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2022-07-13 15:55:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 8. [2022-07-13 15:55:25,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2022-07-13 15:55:25,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2022-07-13 15:55:25,804 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 5 [2022-07-13 15:55:25,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:55:25,804 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2022-07-13 15:55:25,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 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) [2022-07-13 15:55:25,805 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2022-07-13 15:55:25,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-07-13 15:55:25,805 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:55:25,805 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-07-13 15:55:25,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 15:55:25,806 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:55:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:55:25,832 INFO L85 PathProgramCache]: Analyzing trace with hash 1809669604, now seen corresponding path program 1 times [2022-07-13 15:55:25,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:55:25,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283010584] [2022-07-13 15:55:25,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:55:25,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:55:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:55:25,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:55:25,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:55:25,877 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283010584] [2022-07-13 15:55:25,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283010584] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:55:25,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200069240] [2022-07-13 15:55:25,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:55:25,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:55:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:55:25,919 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) [2022-07-13 15:55:25,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 15:55:25,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:55:25,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 3 conjunts are in the unsatisfiable core [2022-07-13 15:55:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:55:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:55:25,994 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:55:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:55:26,019 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200069240] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:55:26,019 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:55:26,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-07-13 15:55:26,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428996643] [2022-07-13 15:55:26,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:55:26,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-13 15:55:26,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:55:26,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-13 15:55:26,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:55:26,023 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-07-13 15:55:26,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:55:26,043 INFO L93 Difference]: Finished difference Result 17 states and 19 transitions. [2022-07-13 15:55:26,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 15:55:26,044 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) Word has length 7 [2022-07-13 15:55:26,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:55:26,044 INFO L225 Difference]: With dead ends: 17 [2022-07-13 15:55:26,044 INFO L226 Difference]: Without dead ends: 14 [2022-07-13 15:55:26,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-07-13 15:55:26,046 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:55:26,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 7 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:55:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-07-13 15:55:26,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-07-13 15:55:26,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 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) [2022-07-13 15:55:26,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2022-07-13 15:55:26,050 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 7 [2022-07-13 15:55:26,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:55:26,051 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2022-07-13 15:55:26,051 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 7 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) [2022-07-13 15:55:26,051 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2022-07-13 15:55:26,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-07-13 15:55:26,052 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:55:26,052 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1] [2022-07-13 15:55:26,070 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 15:55:26,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:55:26,260 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:55:26,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:55:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash 82232734, now seen corresponding path program 2 times [2022-07-13 15:55:26,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:55:26,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102730827] [2022-07-13 15:55:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:55:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:55:26,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 15:55:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:55:26,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 15:55:26,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102730827] [2022-07-13 15:55:26,350 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102730827] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 15:55:26,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301969980] [2022-07-13 15:55:26,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 15:55:26,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 15:55:26,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 15:55:26,356 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) [2022-07-13 15:55:26,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 15:55:26,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 15:55:26,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 15:55:26,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 15:55:26,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 15:55:26,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:55:26,419 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 15:55:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 15:55:26,456 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301969980] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 15:55:26,456 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 15:55:26,456 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2022-07-13 15:55:26,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067397492] [2022-07-13 15:55:26,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 15:55:26,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-07-13 15:55:26,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 15:55:26,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-07-13 15:55:26,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:55:26,458 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2022-07-13 15:55:26,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-13 15:55:26,483 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2022-07-13 15:55:26,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 15:55:26,484 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-07-13 15:55:26,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-13 15:55:26,484 INFO L225 Difference]: With dead ends: 21 [2022-07-13 15:55:26,484 INFO L226 Difference]: Without dead ends: 18 [2022-07-13 15:55:26,485 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-07-13 15:55:26,486 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 6 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-13 15:55:26,486 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 13 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-13 15:55:26,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2022-07-13 15:55:26,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2022-07-13 15:55:26,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 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) [2022-07-13 15:55:26,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2022-07-13 15:55:26,490 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 13 [2022-07-13 15:55:26,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-13 15:55:26,491 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2022-07-13 15:55:26,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 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) [2022-07-13 15:55:26,491 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2022-07-13 15:55:26,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-07-13 15:55:26,492 INFO L187 NwaCegarLoop]: Found error trace [2022-07-13 15:55:26,492 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1] [2022-07-13 15:55:26,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 15:55:26,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-07-13 15:55:26,708 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-13 15:55:26,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 15:55:26,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1640295066, now seen corresponding path program 3 times [2022-07-13 15:55:26,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 15:55:26,713 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785316064] [2022-07-13 15:55:26,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 15:55:26,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 15:55:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 15:55:26,734 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-13 15:55:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-13 15:55:26,769 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-13 15:55:26,770 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-13 15:55:26,771 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-13 15:55:26,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-13 15:55:26,779 INFO L356 BasicCegarLoop]: Path program histogram: [3, 1] [2022-07-13 15:55:26,783 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-13 15:55:26,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.07 03:55:26 BoogieIcfgContainer [2022-07-13 15:55:26,810 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-13 15:55:26,811 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-13 15:55:26,811 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-13 15:55:26,812 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-13 15:55:26,812 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 03:55:25" (3/4) ... [2022-07-13 15:55:26,814 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-13 15:55:26,844 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-13 15:55:26,844 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-13 15:55:26,845 INFO L158 Benchmark]: Toolchain (without parser) took 1908.88ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 66.4MB in the beginning and 70.0MB in the end (delta: -3.5MB). Peak memory consumption was 15.7MB. Max. memory is 16.1GB. [2022-07-13 15:55:26,845 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 98.6MB. Free memory is still 52.3MB. There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 15:55:26,846 INFO L158 Benchmark]: CACSL2BoogieTranslator took 207.97ms. Allocated memory is still 98.6MB. Free memory was 66.2MB in the beginning and 75.7MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 15:55:26,846 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.94ms. Allocated memory is still 98.6MB. Free memory was 75.3MB in the beginning and 74.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:55:26,846 INFO L158 Benchmark]: Boogie Preprocessor took 23.00ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 73.3MB in the end (delta: 738.5kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-13 15:55:26,847 INFO L158 Benchmark]: RCFGBuilder took 164.17ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 64.9MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-07-13 15:55:26,847 INFO L158 Benchmark]: TraceAbstraction took 1432.39ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 64.5MB in the beginning and 72.1MB in the end (delta: -7.5MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. [2022-07-13 15:55:26,847 INFO L158 Benchmark]: Witness Printer took 33.43ms. Allocated memory is still 119.5MB. Free memory was 72.1MB in the beginning and 70.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-13 15:55:26,849 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 98.6MB. Free memory is still 52.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 207.97ms. Allocated memory is still 98.6MB. Free memory was 66.2MB in the beginning and 75.7MB in the end (delta: -9.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.94ms. Allocated memory is still 98.6MB. Free memory was 75.3MB in the beginning and 74.0MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.00ms. Allocated memory is still 98.6MB. Free memory was 74.0MB in the beginning and 73.3MB in the end (delta: 738.5kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 164.17ms. Allocated memory is still 98.6MB. Free memory was 72.9MB in the beginning and 64.9MB in the end (delta: 8.0MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 1432.39ms. Allocated memory was 98.6MB in the beginning and 119.5MB in the end (delta: 21.0MB). Free memory was 64.5MB in the beginning and 72.1MB in the end (delta: -7.5MB). Peak memory consumption was 14.6MB. Max. memory is 16.1GB. * Witness Printer took 33.43ms. Allocated memory is still 119.5MB. Free memory was 72.1MB in the beginning and 70.0MB in the end (delta: 2.1MB). 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: 23]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int a = 6; [L19] a = 0 VAL [a=0] [L19] COND TRUE a < 6 VAL [a=0] [L19] ++a VAL [a=1] [L19] COND TRUE a < 6 VAL [a=1] [L19] ++a VAL [a=2] [L19] COND TRUE a < 6 VAL [a=2] [L19] ++a VAL [a=3] [L19] COND TRUE a < 6 VAL [a=3] [L19] ++a VAL [a=4] [L19] COND TRUE a < 6 VAL [a=4] [L19] ++a VAL [a=5] [L19] COND TRUE a < 6 VAL [a=5] [L19] ++a VAL [a=6] [L19] COND FALSE !(a < 6) VAL [a=6] [L22] COND TRUE a == 6 VAL [a=6] [L23] reach_error() VAL [a=6] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 1.4s, OverallIterations: 4, TraceHistogramMax: 6, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 13 SdHoareTripleChecker+Valid, 0.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 13 mSDsluCounter, 34 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 15 mSDsCounter, 7 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 41 IncrementalHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 7 mSolverCounterUnsat, 19 mSDtfsCounter, 41 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 51 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=18occurred in iteration=3, InterpolantAutomatonStates: 17, 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, 3 MinimizatonAttempts, 1 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 62 NumberOfCodeBlocks, 62 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 58 ConstructedInterpolants, 0 QuantifiedInterpolants, 132 SizeOfPredicates, 0 NumberOfNonLiveVariables, 77 ConjunctsInSsa, 9 ConjunctsInUnsatCore, 7 InterpolantComputations, 1 PerfectInterpolantSequences, 0/51 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! [2022-07-13 15:55:26,886 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, 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