./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/test22-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/test22-2.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 0ac3f9dde39c1c30daf84e7d2d3f68c4363e658cdbd9aae18974f8ff3d9b4fc7 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:06:31,039 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:06:31,041 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:06:31,075 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:06:31,076 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:06:31,078 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:06:31,079 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:06:31,081 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:06:31,083 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:06:31,086 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:06:31,087 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:06:31,088 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:06:31,088 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:06:31,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:06:31,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:06:31,093 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:06:31,094 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:06:31,094 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:06:31,096 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:06:31,100 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:06:31,101 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:06:31,102 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:06:31,103 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:06:31,103 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:06:31,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:06:31,107 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:06:31,107 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:06:31,108 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:06:31,108 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:06:31,109 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:06:31,109 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:06:31,110 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:06:31,110 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:06:31,111 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:06:31,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:06:31,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:06:31,112 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:06:31,112 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:06:31,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:06:31,113 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:06:31,114 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:06:31,114 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:06:31,127 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:06:31,127 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:06:31,128 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:06:31,128 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:06:31,128 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:06:31,129 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:06:31,129 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:06:31,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:06:31,129 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:06:31,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:06:31,130 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:06:31,134 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:06:31,134 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:06:31,134 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:06:31,134 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:06:31,134 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:06:31,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:06:31,135 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:06:31,135 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:06:31,135 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:06:31,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:06:31,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:06:31,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:06:31,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:06:31,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:06:31,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:06:31,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:06:31,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:06:31,136 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:06:31,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:06:31,137 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:06:31,137 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:06:31,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:06:31,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:06:31,137 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0ac3f9dde39c1c30daf84e7d2d3f68c4363e658cdbd9aae18974f8ff3d9b4fc7 [2021-12-21 12:06:31,281 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:06:31,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:06:31,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:06:31,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:06:31,300 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:06:31,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/test22-2.c [2021-12-21 12:06:31,347 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d42481c0/d66e384e1f79401d9a87f24e04dba1d8/FLAGe8e2c6bce [2021-12-21 12:06:31,710 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:06:31,711 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/test22-2.c [2021-12-21 12:06:31,715 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d42481c0/d66e384e1f79401d9a87f24e04dba1d8/FLAGe8e2c6bce [2021-12-21 12:06:31,724 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5d42481c0/d66e384e1f79401d9a87f24e04dba1d8 [2021-12-21 12:06:31,725 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:06:31,726 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:06:31,727 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:06:31,727 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:06:31,730 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:06:31,730 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,731 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f0f89f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31, skipping insertion in model container [2021-12-21 12:06:31,731 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,735 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:06:31,744 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:06:31,865 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/test22-2.c[1029,1042] [2021-12-21 12:06:31,867 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:06:31,872 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:06:31,884 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/test22-2.c[1029,1042] [2021-12-21 12:06:31,885 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:06:31,896 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:06:31,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31 WrapperNode [2021-12-21 12:06:31,897 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:06:31,898 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:06:31,898 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:06:31,898 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:06:31,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,916 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,943 INFO L137 Inliner]: procedures = 16, calls = 26, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 85 [2021-12-21 12:06:31,943 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:06:31,944 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:06:31,944 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:06:31,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:06:31,978 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,978 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,980 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,987 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:31,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:06:31,990 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:06:31,990 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:06:31,990 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:06:32,013 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (1/1) ... [2021-12-21 12:06:32,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:06:32,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:06:32,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:06:32,105 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:06:32,121 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:06:32,121 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:06:32,122 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-21 12:06:32,122 INFO L130 BoogieDeclarations]: Found specification of procedure get_dummy [2021-12-21 12:06:32,122 INFO L138 BoogieDeclarations]: Found implementation of procedure get_dummy [2021-12-21 12:06:32,122 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:06:32,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:06:32,122 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-21 12:06:32,172 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:06:32,174 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:06:32,269 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:06:32,273 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:06:32,273 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:06:32,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:06:32 BoogieIcfgContainer [2021-12-21 12:06:32,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:06:32,275 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:06:32,276 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:06:32,278 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:06:32,278 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:06:31" (1/3) ... [2021-12-21 12:06:32,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aac1815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:06:32, skipping insertion in model container [2021-12-21 12:06:32,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:06:31" (2/3) ... [2021-12-21 12:06:32,279 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@aac1815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:06:32, skipping insertion in model container [2021-12-21 12:06:32,279 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:06:32" (3/3) ... [2021-12-21 12:06:32,280 INFO L111 eAbstractionObserver]: Analyzing ICFG test22-2.c [2021-12-21 12:06:32,283 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:06:32,283 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:06:32,316 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:06:32,321 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:06:32,321 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:06:32,331 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 12:06:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-21 12:06:32,335 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:06:32,335 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:06:32,336 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:06:32,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:06:32,339 INFO L85 PathProgramCache]: Analyzing trace with hash -911093318, now seen corresponding path program 1 times [2021-12-21 12:06:32,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:06:32,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788487525] [2021-12-21 12:06:32,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:32,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:06:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 12:06:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:06:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:06:32,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,523 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-12-21 12:06:32,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:06:32,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788487525] [2021-12-21 12:06:32,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788487525] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:06:32,524 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:06:32,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:06:32,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901436150] [2021-12-21 12:06:32,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:06:32,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:06:32,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:06:32,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:06:32,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:06:32,547 INFO L87 Difference]: Start difference. First operand has 26 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 12:06:32,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:06:32,559 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2021-12-21 12:06:32,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:06:32,561 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2021-12-21 12:06:32,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:06:32,566 INFO L225 Difference]: With dead ends: 35 [2021-12-21 12:06:32,566 INFO L226 Difference]: Without dead ends: 22 [2021-12-21 12:06:32,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:06:32,571 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:06:32,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:06:32,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-12-21 12:06:32,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-12-21 12:06:32,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-21 12:06:32,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 26 transitions. [2021-12-21 12:06:32,603 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 26 transitions. Word has length 28 [2021-12-21 12:06:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:06:32,605 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 26 transitions. [2021-12-21 12:06:32,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2021-12-21 12:06:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 26 transitions. [2021-12-21 12:06:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 12:06:32,606 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:06:32,606 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:06:32,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:06:32,607 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:06:32,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:06:32,607 INFO L85 PathProgramCache]: Analyzing trace with hash 1614870372, now seen corresponding path program 1 times [2021-12-21 12:06:32,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:06:32,608 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617415312] [2021-12-21 12:06:32,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:32,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:06:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-21 12:06:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2021-12-21 12:06:32,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-21 12:06:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-12-21 12:06:32,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:06:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617415312] [2021-12-21 12:06:32,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617415312] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-21 12:06:32,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360602300] [2021-12-21 12:06:32,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:32,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:06:32,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:06:32,783 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-21 12:06:32,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-21 12:06:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:06:32,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 45 conjunts are in the unsatisfiable core [2021-12-21 12:06:32,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:06:33,425 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-12-21 12:06:33,454 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:06:33,454 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-21 12:06:33,518 INFO L353 Elim1Store]: treesize reduction 4, result has 63.6 percent of original size [2021-12-21 12:06:33,519 INFO L387 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 13 [2021-12-21 12:06:33,998 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-21 12:06:33,999 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360602300] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-21 12:06:33,999 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-21 12:06:34,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 17, 17] total 40 [2021-12-21 12:06:34,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247514553] [2021-12-21 12:06:34,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-21 12:06:34,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-12-21 12:06:34,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:06:34,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-12-21 12:06:34,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=1430, Unknown=0, NotChecked=0, Total=1560 [2021-12-21 12:06:34,005 INFO L87 Difference]: Start difference. First operand 22 states and 26 transitions. Second operand has 40 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 32 states have internal predecessors, (55), 7 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 12:06:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:06:34,945 INFO L93 Difference]: Finished difference Result 98 states and 119 transitions. [2021-12-21 12:06:34,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-12-21 12:06:34,946 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 32 states have internal predecessors, (55), 7 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) Word has length 29 [2021-12-21 12:06:34,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:06:34,948 INFO L225 Difference]: With dead ends: 98 [2021-12-21 12:06:34,948 INFO L226 Difference]: Without dead ends: 93 [2021-12-21 12:06:34,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=491, Invalid=3541, Unknown=0, NotChecked=0, Total=4032 [2021-12-21 12:06:34,950 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 271 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 455 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 274 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 455 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-21 12:06:34,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [274 Valid, 372 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 455 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-21 12:06:34,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-12-21 12:06:34,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 36. [2021-12-21 12:06:34,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 5 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (10), 6 states have call predecessors, (10), 5 states have call successors, (10) [2021-12-21 12:06:34,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 47 transitions. [2021-12-21 12:06:34,960 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 47 transitions. Word has length 29 [2021-12-21 12:06:34,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:06:34,960 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 47 transitions. [2021-12-21 12:06:34,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 32 states have internal predecessors, (55), 7 states have call successors, (8), 2 states have call predecessors, (8), 8 states have return successors, (9), 9 states have call predecessors, (9), 7 states have call successors, (9) [2021-12-21 12:06:34,961 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 47 transitions. [2021-12-21 12:06:34,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-12-21 12:06:34,962 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:06:34,962 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:06:34,990 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-12-21 12:06:35,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-21 12:06:35,176 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:06:35,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:06:35,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1028064358, now seen corresponding path program 1 times [2021-12-21 12:06:35,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:06:35,177 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571891009] [2021-12-21 12:06:35,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:06:35,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:06:35,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:06:35,243 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:06:35,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:06:35,302 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 12:06:35,304 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:06:35,310 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:06:35,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-21 12:06:35,314 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2021-12-21 12:06:35,316 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:06:35,345 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:06:35 BoogieIcfgContainer [2021-12-21 12:06:35,345 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:06:35,345 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:06:35,346 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:06:35,346 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:06:35,346 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:06:32" (3/4) ... [2021-12-21 12:06:35,348 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-21 12:06:35,381 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-21 12:06:35,381 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:06:35,381 INFO L158 Benchmark]: Toolchain (without parser) took 3655.06ms. Allocated memory was 83.9MB in the beginning and 104.9MB in the end (delta: 21.0MB). Free memory was 43.1MB in the beginning and 50.6MB in the end (delta: -7.5MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2021-12-21 12:06:35,382 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 83.9MB. Free memory is still 60.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:06:35,382 INFO L158 Benchmark]: CACSL2BoogieTranslator took 169.67ms. Allocated memory is still 83.9MB. Free memory was 42.9MB in the beginning and 32.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-21 12:06:35,382 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.76ms. Allocated memory is still 83.9MB. Free memory was 32.6MB in the beginning and 30.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:06:35,382 INFO L158 Benchmark]: Boogie Preprocessor took 45.11ms. Allocated memory is still 83.9MB. Free memory was 30.9MB in the beginning and 62.3MB in the end (delta: -31.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. [2021-12-21 12:06:35,383 INFO L158 Benchmark]: RCFGBuilder took 284.78ms. Allocated memory is still 83.9MB. Free memory was 62.2MB in the beginning and 51.2MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-21 12:06:35,383 INFO L158 Benchmark]: TraceAbstraction took 3069.57ms. Allocated memory was 83.9MB in the beginning and 104.9MB in the end (delta: 21.0MB). Free memory was 50.8MB in the beginning and 53.6MB in the end (delta: -2.8MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. [2021-12-21 12:06:35,383 INFO L158 Benchmark]: Witness Printer took 35.47ms. Allocated memory is still 104.9MB. Free memory was 53.6MB in the beginning and 50.6MB in the end (delta: 3.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:06:35,385 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 83.9MB. Free memory is still 60.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 169.67ms. Allocated memory is still 83.9MB. Free memory was 42.9MB in the beginning and 32.7MB in the end (delta: 10.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.76ms. Allocated memory is still 83.9MB. Free memory was 32.6MB in the beginning and 30.9MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.11ms. Allocated memory is still 83.9MB. Free memory was 30.9MB in the beginning and 62.3MB in the end (delta: -31.3MB). Peak memory consumption was 6.5MB. Max. memory is 16.1GB. * RCFGBuilder took 284.78ms. Allocated memory is still 83.9MB. Free memory was 62.2MB in the beginning and 51.2MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 3069.57ms. Allocated memory was 83.9MB in the beginning and 104.9MB in the end (delta: 21.0MB). Free memory was 50.8MB in the beginning and 53.6MB in the end (delta: -2.8MB). Peak memory consumption was 20.2MB. Max. memory is 16.1GB. * Witness Printer took 35.47ms. Allocated memory is still 104.9MB. Free memory was 53.6MB in the beginning and 50.6MB in the end (delta: 3.0MB). 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: 50]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L11] struct dummy d1, d2; VAL [d1={4:0}, d2={5:0}] [L34] CALL init() [L15] d1.a = __VERIFIER_nondet_int() [L16] d1.b = __VERIFIER_nondet_int() [L18] d2.a = __VERIFIER_nondet_int() [L19] d2.b = __VERIFIER_nondet_int() [L34] RET init() [L35] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={4:0}, d1={4:0}, d2={5:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L35] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=1, __VERIFIER_nondet_bool() ? &d1 : &d2={4:0}, d1={4:0}, d2={5:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={4:0}, pd1={4:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L35] CALL, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}] [L24] EXPR __VERIFIER_nondet_bool() ? &d1 : &d2 VAL [__VERIFIER_nondet_bool()=0, __VERIFIER_nondet_bool() ? &d1 : &d2={5:0}, d1={4:0}, d2={5:0}] [L24] return (__VERIFIER_nondet_bool() ? &d1 : &d2); [L35] RET, EXPR get_dummy() VAL [d1={4:0}, d2={5:0}, get_dummy()={5:0}, pd1={4:0}, pd2={4:0}] [L35] struct dummy *pd1 = get_dummy(), *pd2 = get_dummy(), *pd3 = get_dummy(); [L36] int i = __VERIFIER_nondet_int(); [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L37] EXPR (*pd2).a [L37] pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 VAL [(*pd2).a=6, d1={4:0}, d2={5:0}, i=-3, pd1={4:0}, pd1 != 0 && pd1 == pd2 && (*pd2).a > 0=1, pd2={4:0}, pd3={5:0}] [L37] COND TRUE pd1 != 0 && pd1 == pd2 && (*pd2).a > 0 [L38] int *pa = &pd1->a; [L39] EXPR pd3->a [L39] i = pd3->a - 10 [L40] EXPR \read(*pa) VAL [\read(*pa)=6, d1={4:0}, d2={5:0}, i=7, pa={4:0}, pd1={4:0}, pd2={4:0}, pd3={5:0}] [L40] COND FALSE !(i < *pa) [L43] CALL, EXPR check(pd2, i) [L29] EXPR s1->a [L29] return s1->a == i; [L43] RET, EXPR check(pd2, i) [L43] COND TRUE !check(pd2, i) [L50] reach_error() VAL [d1={4:0}, d2={5:0}, i=7, pa={4:0}, pd1={4:0}, pd2={4:0}, pd3={5:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 3, TraceHistogramMax: 3, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 274 SdHoareTripleChecker+Valid, 0.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 271 mSDsluCounter, 403 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 350 mSDsCounter, 75 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 455 IncrementalHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 75 mSolverCounterUnsat, 53 mSDtfsCounter, 455 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=36occurred in iteration=2, InterpolantAutomatonStates: 31, 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, 57 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 115 NumberOfCodeBlocks, 115 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 111 ConstructedInterpolants, 0 QuantifiedInterpolants, 617 SizeOfPredicates, 14 NumberOfNonLiveVariables, 177 ConjunctsInSsa, 45 ConjunctsInUnsatCore, 4 InterpolantComputations, 1 PerfectInterpolantSequences, 33/48 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! [2021-12-21 12:06:35,452 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