./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/float-benchs/loop-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 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/float-benchs/loop-1.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 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:29:43,826 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:29:43,828 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:29:43,875 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:29:43,876 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:29:43,877 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:29:43,877 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:29:43,878 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:29:43,879 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:29:43,880 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:29:43,881 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:29:43,881 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:29:43,882 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:29:43,882 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:29:43,883 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:29:43,884 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:29:43,884 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:29:43,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:29:43,886 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:29:43,888 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:29:43,889 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:29:43,890 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:29:43,890 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:29:43,891 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:29:43,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:29:43,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:29:43,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:29:43,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:29:43,894 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:29:43,895 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:29:43,895 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:29:43,895 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:29:43,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:29:43,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:29:43,897 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:29:43,897 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:29:43,898 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:29:43,898 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:29:43,898 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:29:43,899 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:29:43,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:29:43,904 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:29:43,918 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:29:43,927 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:29:43,928 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:29:43,928 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:29:43,929 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:29:43,929 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:29:43,929 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:29:43,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:29:43,930 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:29:43,930 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:29:43,931 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:29:43,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:29:43,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:29:43,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:29:43,931 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:29:43,931 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:29:43,931 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:29:43,931 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:29:43,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:29:43,932 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:29:43,932 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:29:43,932 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:29:43,932 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:29:43,932 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:29:43,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:29:43,933 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:29:43,933 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:29:43,933 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:29:43,933 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:29:43,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:29:43,933 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:29:43,934 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:29:43,934 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:29:43,934 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:29:43,934 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b [2021-12-15 23:29:44,141 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:29:44,160 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:29:44,162 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:29:44,163 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:29:44,163 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:29:44,164 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/loop-1.c [2021-12-15 23:29:44,206 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12391936a/e74319013aa3490c856c39c78b409ded/FLAG333887064 [2021-12-15 23:29:44,531 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:29:44,532 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/loop-1.c [2021-12-15 23:29:44,538 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12391936a/e74319013aa3490c856c39c78b409ded/FLAG333887064 [2021-12-15 23:29:44,981 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/12391936a/e74319013aa3490c856c39c78b409ded [2021-12-15 23:29:44,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:29:44,984 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:29:44,987 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:29:44,987 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:29:44,990 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:29:44,992 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:29:44" (1/1) ... [2021-12-15 23:29:44,993 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1751e8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:44, skipping insertion in model container [2021-12-15 23:29:44,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:29:44" (1/1) ... [2021-12-15 23:29:44,998 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:29:45,007 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:29:45,111 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/float-benchs/loop-1.c[311,324] [2021-12-15 23:29:45,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:29:45,124 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:29:45,133 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/float-benchs/loop-1.c[311,324] [2021-12-15 23:29:45,137 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:29:45,146 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:29:45,147 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45 WrapperNode [2021-12-15 23:29:45,147 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:29:45,148 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:29:45,148 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:29:45,148 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:29:45,152 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,156 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,166 INFO L137 Inliner]: procedures = 12, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 32 [2021-12-15 23:29:45,167 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:29:45,167 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:29:45,167 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:29:45,167 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:29:45,172 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,173 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,178 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,179 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:29:45,180 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:29:45,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:29:45,180 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:29:45,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (1/1) ... [2021-12-15 23:29:45,185 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:29:45,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:29:45,202 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) [2021-12-15 23:29:45,220 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 [2021-12-15 23:29:45,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:29:45,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:29:45,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:29:45,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:29:45,269 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:29:45,270 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:29:45,356 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:29:45,360 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:29:45,360 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:29:45,361 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:29:45 BoogieIcfgContainer [2021-12-15 23:29:45,361 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:29:45,363 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:29:45,363 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:29:45,366 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:29:45,366 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:29:44" (1/3) ... [2021-12-15 23:29:45,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfecb96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:29:45, skipping insertion in model container [2021-12-15 23:29:45,367 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:45" (2/3) ... [2021-12-15 23:29:45,367 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfecb96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:29:45, skipping insertion in model container [2021-12-15 23:29:45,368 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:29:45" (3/3) ... [2021-12-15 23:29:45,368 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-1.c [2021-12-15 23:29:45,372 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:29:45,372 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:29:45,413 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:29:45,419 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 [2021-12-15 23:29:45,420 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:29:45,431 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) [2021-12-15 23:29:45,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 23:29:45,443 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:29:45,443 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 23:29:45,444 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:29:45,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:29:45,449 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-15 23:29:45,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:29:45,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369629982] [2021-12-15 23:29:45,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:29:45,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:29:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 23:29:45,529 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 23:29:45,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 23:29:45,563 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 23:29:45,564 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 23:29:45,566 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-15 23:29:45,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:29:45,570 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-12-15 23:29:45,572 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 23:29:45,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:29:45 BoogieIcfgContainer [2021-12-15 23:29:45,589 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 23:29:45,591 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 23:29:45,591 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 23:29:45,591 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 23:29:45,592 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:29:45" (3/4) ... [2021-12-15 23:29:45,594 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-15 23:29:45,594 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 23:29:45,596 INFO L158 Benchmark]: Toolchain (without parser) took 610.41ms. Allocated memory was 94.4MB in the beginning and 134.2MB in the end (delta: 39.8MB). Free memory was 68.0MB in the beginning and 86.3MB in the end (delta: -18.4MB). Peak memory consumption was 19.6MB. Max. memory is 16.1GB. [2021-12-15 23:29:45,596 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 94.4MB. Free memory is still 51.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:29:45,597 INFO L158 Benchmark]: CACSL2BoogieTranslator took 160.26ms. Allocated memory was 94.4MB in the beginning and 134.2MB in the end (delta: 39.8MB). Free memory was 67.7MB in the beginning and 112.0MB in the end (delta: -44.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 23:29:45,598 INFO L158 Benchmark]: Boogie Procedure Inliner took 18.93ms. Allocated memory is still 134.2MB. Free memory was 112.0MB in the beginning and 110.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:29:45,600 INFO L158 Benchmark]: Boogie Preprocessor took 12.16ms. Allocated memory is still 134.2MB. Free memory was 110.5MB in the beginning and 109.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:29:45,602 INFO L158 Benchmark]: RCFGBuilder took 181.64ms. Allocated memory is still 134.2MB. Free memory was 109.4MB in the beginning and 99.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-12-15 23:29:45,603 INFO L158 Benchmark]: TraceAbstraction took 226.51ms. Allocated memory is still 134.2MB. Free memory was 99.5MB in the beginning and 86.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 23:29:45,604 INFO L158 Benchmark]: Witness Printer took 3.47ms. Allocated memory is still 134.2MB. Free memory was 86.9MB in the beginning and 86.3MB in the end (delta: 527.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:29:45,610 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 94.4MB. Free memory is still 51.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 160.26ms. Allocated memory was 94.4MB in the beginning and 134.2MB in the end (delta: 39.8MB). Free memory was 67.7MB in the beginning and 112.0MB in the end (delta: -44.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 18.93ms. Allocated memory is still 134.2MB. Free memory was 112.0MB in the beginning and 110.5MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 12.16ms. Allocated memory is still 134.2MB. Free memory was 110.5MB in the beginning and 109.4MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 181.64ms. Allocated memory is still 134.2MB. Free memory was 109.4MB in the beginning and 99.5MB in the end (delta: 9.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 226.51ms. Allocated memory is still 134.2MB. Free memory was 99.5MB in the beginning and 86.9MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 3.47ms. Allocated memory is still 134.2MB. Free memory was 86.9MB in the beginning and 86.3MB in the end (delta: 527.2kB). There was no memory consumed. 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 - UnprovableResult [Line: 4]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of someBinaryFLOATComparisonOperation at line 20, overapproximation of someBinaryDOUBLEComparisonOperation at line 20. Possible FailurePath: [L8] float x, y, z; [L10] x = 1.f [L11] y = 1e7 [L12] z = 42.f VAL [x=1, y=10000000, z=42] [L14] COND FALSE !(x < y) VAL [x=1, y=10000000, z=42] [L20] CALL __VERIFIER_assert(z >= 0.f && z <= 1e8) [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L4] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 11 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.2s, OverallIterations: 1, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=11occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 6 NumberOfCodeBlocks, 6 NumberOfCodeBlocksAsserted, 1 NumberOfCheckSat, 0 ConstructedInterpolants, 0 QuantifiedInterpolants, 0 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 0 InterpolantComputations, 0 PerfectInterpolantSequences, 0/0 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 could not prove your program: unable to determine feasibility of some traces [2021-12-15 23:29:45,641 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/float-benchs/loop-1.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.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 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:29:47,239 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:29:47,241 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:29:47,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:29:47,264 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:29:47,264 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:29:47,265 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:29:47,266 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:29:47,268 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:29:47,271 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:29:47,272 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:29:47,273 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:29:47,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:29:47,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:29:47,276 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:29:47,280 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:29:47,282 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:29:47,284 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:29:47,286 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:29:47,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:29:47,292 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:29:47,292 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:29:47,293 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:29:47,294 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:29:47,295 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:29:47,298 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:29:47,298 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:29:47,299 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:29:47,300 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:29:47,300 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:29:47,301 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:29:47,301 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:29:47,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:29:47,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:29:47,303 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:29:47,304 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:29:47,304 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:29:47,304 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:29:47,305 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:29:47,306 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:29:47,306 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:29:47,307 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-15 23:29:47,333 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:29:47,333 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:29:47,334 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:29:47,334 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:29:47,335 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:29:47,335 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:29:47,336 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:29:47,336 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:29:47,336 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:29:47,336 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:29:47,337 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:29:47,337 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:29:47,337 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:29:47,337 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:29:47,337 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:29:47,337 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:29:47,337 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-15 23:29:47,338 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-15 23:29:47,338 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-15 23:29:47,338 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:29:47,338 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:29:47,338 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:29:47,338 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:29:47,338 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:29:47,345 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:29:47,345 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:29:47,345 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:29:47,346 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:29:47,346 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:29:47,346 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:29:47,346 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-15 23:29:47,346 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-15 23:29:47,347 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:29:47,347 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:29:47,347 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:29:47,347 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:29:47,347 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-15 23:29:47,347 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1b0545f8921a3072195050599e45eb6fe3a423f5bd887720e0418c3666aaad9b [2021-12-15 23:29:47,604 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:29:47,621 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:29:47,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:29:47,626 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:29:47,626 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:29:47,628 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/float-benchs/loop-1.c [2021-12-15 23:29:47,672 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f039bb8/daf8d681a21845649dc80701ad5ba3af/FLAGf037b54b5 [2021-12-15 23:29:48,012 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:29:48,013 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/float-benchs/loop-1.c [2021-12-15 23:29:48,016 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f039bb8/daf8d681a21845649dc80701ad5ba3af/FLAGf037b54b5 [2021-12-15 23:29:48,476 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/59f039bb8/daf8d681a21845649dc80701ad5ba3af [2021-12-15 23:29:48,478 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:29:48,479 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:29:48,480 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:29:48,480 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:29:48,483 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:29:48,483 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,484 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@cf11d76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48, skipping insertion in model container [2021-12-15 23:29:48,484 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,488 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:29:48,495 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:29:48,590 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/float-benchs/loop-1.c[311,324] [2021-12-15 23:29:48,597 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:29:48,605 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:29:48,616 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/float-benchs/loop-1.c[311,324] [2021-12-15 23:29:48,618 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:29:48,641 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:29:48,641 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48 WrapperNode [2021-12-15 23:29:48,641 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:29:48,642 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:29:48,642 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:29:48,642 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:29:48,646 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,662 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,676 INFO L137 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 33 [2021-12-15 23:29:48,676 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:29:48,677 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:29:48,677 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:29:48,678 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:29:48,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,683 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,693 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,694 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,703 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,710 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,712 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,714 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:29:48,716 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:29:48,716 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:29:48,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:29:48,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (1/1) ... [2021-12-15 23:29:48,722 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:29:48,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:29:48,740 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) [2021-12-15 23:29:48,746 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 [2021-12-15 23:29:48,767 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:29:48,767 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:29:48,767 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:29:48,768 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-15 23:29:48,817 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:29:48,820 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:29:49,211 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:29:49,215 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:29:49,215 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-15 23:29:49,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:29:49 BoogieIcfgContainer [2021-12-15 23:29:49,217 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:29:49,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:29:49,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:29:49,220 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:29:49,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:29:48" (1/3) ... [2021-12-15 23:29:49,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8d172d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:29:49, skipping insertion in model container [2021-12-15 23:29:49,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:29:48" (2/3) ... [2021-12-15 23:29:49,221 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e8d172d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:29:49, skipping insertion in model container [2021-12-15 23:29:49,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:29:49" (3/3) ... [2021-12-15 23:29:49,222 INFO L111 eAbstractionObserver]: Analyzing ICFG loop-1.c [2021-12-15 23:29:49,226 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:29:49,226 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-15 23:29:49,256 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:29:49,261 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 [2021-12-15 23:29:49,261 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-15 23:29:49,270 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) [2021-12-15 23:29:49,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 23:29:49,273 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:29:49,273 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 23:29:49,274 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:29:49,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:29:49,277 INFO L85 PathProgramCache]: Analyzing trace with hash 889633835, now seen corresponding path program 1 times [2021-12-15 23:29:49,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:29:49,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [230813951] [2021-12-15 23:29:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:29:49,286 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:29:49,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:29:49,288 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 23:29:49,297 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-15 23:29:49,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:29:49,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 23 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-15 23:29:49,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:29:49,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:29:49,432 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-15 23:29:49,432 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 23:29:49,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [230813951] [2021-12-15 23:29:49,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [230813951] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:29:49,433 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:29:49,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:29:49,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417467373] [2021-12-15 23:29:49,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:29:49,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:29:49,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 23:29:49,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:29:49,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:29:49,460 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 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:29:49,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:29:49,472 INFO L93 Difference]: Finished difference Result 20 states and 24 transitions. [2021-12-15 23:29:49,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:29:49,474 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-12-15 23:29:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:29:49,480 INFO L225 Difference]: With dead ends: 20 [2021-12-15 23:29:49,480 INFO L226 Difference]: Without dead ends: 8 [2021-12-15 23:29:49,483 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:29:49,488 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:29:49,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 18 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 2 Unchecked, 0.0s Time] [2021-12-15 23:29:49,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-12-15 23:29:49,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-12-15 23:29:49,512 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) [2021-12-15 23:29:49,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-12-15 23:29:49,514 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2021-12-15 23:29:49,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:29:49,514 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-12-15 23:29:49,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:29:49,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-12-15 23:29:49,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 23:29:49,515 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:29:49,516 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:29:49,523 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-15 23:29:49,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 23:29:49,724 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:29:49,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:29:49,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1810510480, now seen corresponding path program 1 times [2021-12-15 23:29:49,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:29:49,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [238294588] [2021-12-15 23:29:49,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:29:49,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:29:49,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:29:49,729 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 23:29:49,731 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-15 23:29:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:29:49,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-15 23:29:49,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:29:49,921 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:29:49,921 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-15 23:29:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:29:53,124 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-15 23:29:53,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [238294588] [2021-12-15 23:29:53,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [238294588] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-15 23:29:53,124 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-15 23:29:53,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2021-12-15 23:29:53,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103515102] [2021-12-15 23:29:53,125 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-15 23:29:53,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-15 23:29:53,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-15 23:29:53,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-15 23:29:53,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=25, Unknown=1, NotChecked=0, Total=42 [2021-12-15 23:29:53,126 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:29:58,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:29:58,831 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2021-12-15 23:29:58,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-15 23:29:58,836 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 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 [2021-12-15 23:29:58,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:29:58,837 INFO L225 Difference]: With dead ends: 15 [2021-12-15 23:29:58,837 INFO L226 Difference]: Without dead ends: 11 [2021-12-15 23:29:58,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=36, Invalid=53, Unknown=1, NotChecked=0, Total=90 [2021-12-15 23:29:58,838 INFO L933 BasicCegarLoop]: 4 mSDtfsCounter, 6 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-12-15 23:29:58,838 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [6 Valid, 11 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-12-15 23:29:58,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-12-15 23:29:58,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-12-15 23:29:58,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:29:58,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-12-15 23:29:58,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 7 [2021-12-15 23:29:58,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:29:58,844 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-12-15 23:29:58,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:29:58,844 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-12-15 23:29:58,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 23:29:58,845 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:29:58,845 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1] [2021-12-15 23:29:58,856 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-15 23:29:59,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-15 23:29:59,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:29:59,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:29:59,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1922847381, now seen corresponding path program 2 times [2021-12-15 23:29:59,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-15 23:29:59,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1420203636] [2021-12-15 23:29:59,051 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-15 23:29:59,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-15 23:29:59,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-15 23:29:59,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-15 23:29:59,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-15 23:29:59,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-15 23:29:59,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-15 23:29:59,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-15 23:29:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-15 23:29:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:29:59,490 INFO L328 TraceCheckSpWp]: Computing backward predicates...