./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/freire2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5fbdf5bf 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/nla-digbench/freire2.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 20d32d2c3ebf4b6346bc2a38a0b1f36e05f930cf .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis 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/nla-digbench/freire2.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 20d32d2c3ebf4b6346bc2a38a0b1f36e05f930cf ............................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 11:53:28,566 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:53:28,569 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:53:28,600 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:53:28,600 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:53:28,602 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:53:28,603 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:53:28,607 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:53:28,609 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:53:28,613 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:53:28,613 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:53:28,625 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:53:28,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:53:28,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:53:28,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:53:28,632 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:53:28,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:53:28,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:53:28,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:53:28,640 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:53:28,641 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:53:28,642 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:53:28,643 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:53:28,644 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:53:28,649 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:53:28,649 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:53:28,649 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:53:28,650 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:53:28,651 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:53:28,651 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:53:28,652 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:53:28,652 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:53:28,653 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:53:28,654 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:53:29,036 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:53:29,036 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:53:29,037 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:53:29,038 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:53:29,038 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:53:29,039 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:53:29,040 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:53:29,045 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-08-29 11:53:29,074 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:53:29,075 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:53:29,075 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:53:29,076 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:53:29,077 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:53:29,077 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:53:29,077 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:53:29,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:53:29,078 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:53:29,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-29 11:53:29,079 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:53:29,079 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:53:29,079 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:53:29,079 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:53:29,079 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:53:29,080 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:53:29,080 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:53:29,080 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:53:29,080 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:53:29,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:53:29,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:53:29,081 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:53:29,081 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:53:29,081 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:53:29,081 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:53:29,081 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:53:29,081 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-29 11:53:29,082 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-29 11:53:29,082 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:53:29,082 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:53:29,082 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20d32d2c3ebf4b6346bc2a38a0b1f36e05f930cf [2021-08-29 11:53:29,345 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:53:29,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:53:29,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:53:29,364 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:53:29,365 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:53:29,366 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire2.c [2021-08-29 11:53:29,403 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ef4db9a/350e81fa9ed0455c8ef0414fcc768010/FLAG7a0ff899e [2021-08-29 11:53:29,745 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:53:29,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c [2021-08-29 11:53:29,750 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ef4db9a/350e81fa9ed0455c8ef0414fcc768010/FLAG7a0ff899e [2021-08-29 11:53:30,214 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4ef4db9a/350e81fa9ed0455c8ef0414fcc768010 [2021-08-29 11:53:30,216 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:53:30,217 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:53:30,218 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:53:30,218 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:53:30,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:53:30,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,222 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d23d4ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30, skipping insertion in model container [2021-08-29 11:53:30,222 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,226 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:53:30,235 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:53:30,349 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2021-08-29 11:53:30,379 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:53:30,387 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:53:30,396 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2021-08-29 11:53:30,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:53:30,448 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:53:30,449 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30 WrapperNode [2021-08-29 11:53:30,450 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:53:30,451 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:53:30,451 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:53:30,451 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:53:30,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,467 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,486 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:53:30,487 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:53:30,487 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:53:30,487 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:53:30,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,493 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,494 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,513 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,518 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:53:30,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:53:30,524 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:53:30,524 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:53:30,525 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (1/1) ... [2021-08-29 11:53:30,529 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:53:30,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:53:30,557 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) [2021-08-29 11:53:30,559 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 [2021-08-29 11:53:30,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-08-29 11:53:30,581 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:53:30,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:53:30,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:53:30,671 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:53:30,672 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-29 11:53:30,673 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:53:30 BoogieIcfgContainer [2021-08-29 11:53:30,673 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:53:30,675 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:53:30,675 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:53:30,677 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:53:30,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:53:30" (1/3) ... [2021-08-29 11:53:30,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19959a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:53:30, skipping insertion in model container [2021-08-29 11:53:30,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:30" (2/3) ... [2021-08-29 11:53:30,678 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19959a8e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:53:30, skipping insertion in model container [2021-08-29 11:53:30,678 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:53:30" (3/3) ... [2021-08-29 11:53:30,679 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.c [2021-08-29 11:53:30,681 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:53:30,682 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-08-29 11:53:30,724 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:53:30,728 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-29 11:53:30,728 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-29 11:53:30,736 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-08-29 11:53:30,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-29 11:53:30,739 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:53:30,739 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-29 11:53:30,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 11:53:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:53:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2021-08-29 11:53:30,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-29 11:53:30,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97431142] [2021-08-29 11:53:30,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:53:30,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-29 11:53:30,796 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-08-29 11:53:30,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449436123] [2021-08-29 11:53:30,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:53:30,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-29 11:53:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:53:30,798 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) [2021-08-29 11:53:30,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-29 11:53:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 11:53:30,844 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 11:53:30,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 11:53:30,943 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-29 11:53:30,945 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 11:53:30,945 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2021-08-29 11:53:30,946 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2021-08-29 11:53:30,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2021-08-29 11:53:30,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2021-08-29 11:53:30,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2021-08-29 11:53:30,947 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2021-08-29 11:53:30,979 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-29 11:53:31,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-08-29 11:53:31,182 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:53:31,192 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:53:31 BoogieIcfgContainer [2021-08-29 11:53:31,194 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:53:31,195 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:53:31,195 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:53:31,195 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:53:31,195 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:53:30" (3/4) ... [2021-08-29 11:53:31,198 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-08-29 11:53:31,198 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:53:31,199 INFO L158 Benchmark]: Toolchain (without parser) took 981.71ms. Allocated memory is still 54.5MB. Free memory was 39.5MB in the beginning and 24.1MB in the end (delta: 15.4MB). Peak memory consumption was 14.8MB. Max. memory is 16.1GB. [2021-08-29 11:53:31,199 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 44.0MB. Free memory was 26.5MB in the beginning and 26.5MB in the end (delta: 36.4kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:53:31,200 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.34ms. Allocated memory is still 54.5MB. Free memory was 39.4MB in the beginning and 38.4MB in the end (delta: 976.3kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-08-29 11:53:31,200 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.27ms. Allocated memory is still 54.5MB. Free memory was 38.2MB in the beginning and 36.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:53:31,200 INFO L158 Benchmark]: Boogie Preprocessor took 35.86ms. Allocated memory is still 54.5MB. Free memory was 36.7MB in the beginning and 35.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:53:31,209 INFO L158 Benchmark]: RCFGBuilder took 149.81ms. Allocated memory is still 54.5MB. Free memory was 35.4MB in the beginning and 26.6MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 11:53:31,210 INFO L158 Benchmark]: TraceAbstraction took 519.35ms. Allocated memory is still 54.5MB. Free memory was 26.2MB in the beginning and 24.6MB in the end (delta: 1.7MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. [2021-08-29 11:53:31,210 INFO L158 Benchmark]: Witness Printer took 3.42ms. Allocated memory is still 54.5MB. Free memory was 24.6MB in the beginning and 24.3MB in the end (delta: 223.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:53:31,212 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 44.0MB. Free memory was 26.5MB in the beginning and 26.5MB in the end (delta: 36.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.34ms. Allocated memory is still 54.5MB. Free memory was 39.4MB in the beginning and 38.4MB in the end (delta: 976.3kB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.27ms. Allocated memory is still 54.5MB. Free memory was 38.2MB in the beginning and 36.7MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 35.86ms. Allocated memory is still 54.5MB. Free memory was 36.7MB in the beginning and 35.4MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 149.81ms. Allocated memory is still 54.5MB. Free memory was 35.4MB in the beginning and 26.6MB in the end (delta: 8.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 519.35ms. Allocated memory is still 54.5MB. Free memory was 26.2MB in the beginning and 24.6MB in the end (delta: 1.7MB). Peak memory consumption was 3.5MB. Max. memory is 16.1GB. * Witness Printer took 3.42ms. Allocated memory is still 54.5MB. Free memory was 24.6MB in the beginning and 24.3MB in the end (delta: 223.2kB). 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, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of to_int at line 33. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] x = a [L29] s = 3.25 [L30] r = 1 [L32] COND TRUE 1 [L17] COND TRUE !(cond) [L19] reach_error() - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 457.76ms, OverallIterations: 1, TraceHistogramMax: 1, EmptinessCheckTime: 4.78ms, AutomataDifference: 0.00ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 5.45ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: , PredicateUnifierStatistics: No data available, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 4.57ms SsaConstructionTime, 20.75ms SatisfiabilityAnalysisTime, 0.00ms InterpolantComputationTime, 5 NumberOfCodeBlocks, 5 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 [2021-08-29 11:53:31,274 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... ### Bit-precise run ### This is Ultimate 0.2.1-wip.dd.seqcomp-5fbdf5b [2021-08-29 11:53:33,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-29 11:53:33,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-29 11:53:33,617 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-29 11:53:33,617 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-29 11:53:33,620 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-29 11:53:33,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-29 11:53:33,625 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-29 11:53:33,627 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-29 11:53:33,630 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-29 11:53:33,631 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-29 11:53:33,632 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-29 11:53:33,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-29 11:53:33,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-29 11:53:33,635 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-29 11:53:33,640 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-29 11:53:33,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-29 11:53:33,641 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-29 11:53:33,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-29 11:53:33,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-29 11:53:33,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-29 11:53:33,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-29 11:53:33,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-29 11:53:33,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-29 11:53:33,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-29 11:53:33,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-29 11:53:33,657 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-29 11:53:33,658 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-29 11:53:33,658 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-29 11:53:33,659 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-29 11:53:33,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-29 11:53:33,661 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-29 11:53:33,662 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-29 11:53:33,663 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-29 11:53:33,664 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-29 11:53:33,664 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-29 11:53:33,664 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-29 11:53:33,665 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-29 11:53:33,665 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-29 11:53:33,666 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-29 11:53:33,666 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-29 11:53:33,670 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-08-29 11:53:33,699 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-29 11:53:33,700 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-29 11:53:33,700 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-29 11:53:33,701 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-29 11:53:33,702 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-29 11:53:33,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-29 11:53:33,702 INFO L138 SettingsManager]: * Use SBE=true [2021-08-29 11:53:33,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-29 11:53:33,703 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-29 11:53:33,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-29 11:53:33,703 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-29 11:53:33,704 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-29 11:53:33,704 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-29 11:53:33,704 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-29 11:53:33,704 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-08-29 11:53:33,704 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-08-29 11:53:33,704 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-29 11:53:33,704 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-29 11:53:33,705 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-29 11:53:33,705 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-29 11:53:33,705 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-29 11:53:33,705 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-29 11:53:33,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-29 11:53:33,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:53:33,706 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-29 11:53:33,706 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-29 11:53:33,706 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-29 11:53:33,706 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-08-29 11:53:33,706 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-08-29 11:53:33,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-29 11:53:33,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-08-29 11:53:33,706 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-29 11:53:33,707 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 20d32d2c3ebf4b6346bc2a38a0b1f36e05f930cf [2021-08-29 11:53:34,053 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-29 11:53:34,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-29 11:53:34,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-29 11:53:34,101 INFO L271 PluginConnector]: Initializing CDTParser... [2021-08-29 11:53:34,102 INFO L275 PluginConnector]: CDTParser initialized [2021-08-29 11:53:34,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire2.c [2021-08-29 11:53:34,282 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ed267b3/02b9d1ee585849559e62493f8ad5d2e8/FLAG0a1348503 [2021-08-29 11:53:34,628 INFO L306 CDTParser]: Found 1 translation units. [2021-08-29 11:53:34,628 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c [2021-08-29 11:53:34,633 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ed267b3/02b9d1ee585849559e62493f8ad5d2e8/FLAG0a1348503 [2021-08-29 11:53:35,016 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69ed267b3/02b9d1ee585849559e62493f8ad5d2e8 [2021-08-29 11:53:35,018 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-29 11:53:35,019 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-08-29 11:53:35,021 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-08-29 11:53:35,021 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-08-29 11:53:35,024 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-08-29 11:53:35,024 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,026 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e5fd677 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35, skipping insertion in model container [2021-08-29 11:53:35,026 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,031 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-08-29 11:53:35,042 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-08-29 11:53:35,140 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2021-08-29 11:53:35,154 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:53:35,163 INFO L203 MainTranslator]: Completed pre-run [2021-08-29 11:53:35,170 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire2.c[709,722] [2021-08-29 11:53:35,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-08-29 11:53:35,192 INFO L208 MainTranslator]: Completed translation [2021-08-29 11:53:35,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35 WrapperNode [2021-08-29 11:53:35,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-08-29 11:53:35,193 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-29 11:53:35,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-29 11:53:35,194 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-29 11:53:35,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,218 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,231 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-29 11:53:35,232 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-29 11:53:35,232 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-29 11:53:35,232 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-29 11:53:35,237 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,238 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,240 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,240 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,247 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,249 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,250 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-29 11:53:35,251 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-29 11:53:35,251 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-29 11:53:35,251 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-29 11:53:35,252 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (1/1) ... [2021-08-29 11:53:35,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-29 11:53:35,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-29 11:53:35,295 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) [2021-08-29 11:53:35,313 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 [2021-08-29 11:53:35,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-08-29 11:53:35,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-08-29 11:53:35,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-29 11:53:35,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-29 11:53:35,487 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-29 11:53:35,490 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2021-08-29 11:53:35,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:53:35 BoogieIcfgContainer [2021-08-29 11:53:35,492 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-29 11:53:35,493 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-29 11:53:35,493 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-29 11:53:35,495 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-29 11:53:35,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.08 11:53:35" (1/3) ... [2021-08-29 11:53:35,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e98232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:53:35, skipping insertion in model container [2021-08-29 11:53:35,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.08 11:53:35" (2/3) ... [2021-08-29 11:53:35,497 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e98232 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.08 11:53:35, skipping insertion in model container [2021-08-29 11:53:35,497 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:53:35" (3/3) ... [2021-08-29 11:53:35,500 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2.c [2021-08-29 11:53:35,504 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-29 11:53:35,504 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-08-29 11:53:35,552 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-29 11:53:35,559 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-08-29 11:53:35,559 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-29 11:53:35,571 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 30 states have internal predecessors, (39), 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) [2021-08-29 11:53:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-08-29 11:53:35,578 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:53:35,579 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-08-29 11:53:35,580 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 11:53:35,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:53:35,583 INFO L82 PathProgramCache]: Analyzing trace with hash 28699754, now seen corresponding path program 1 times [2021-08-29 11:53:35,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 11:53:35,591 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2023438801] [2021-08-29 11:53:35,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:53:35,592 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 11:53:35,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 11:53:35,633 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) [2021-08-29 11:53:35,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-08-29 11:53:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:53:35,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 11:53:35,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:53:35,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:53:35,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:53:41,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:53:41,499 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 11:53:41,500 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2023438801] [2021-08-29 11:53:41,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2023438801] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 11:53:41,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:53:41,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2021-08-29 11:53:41,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183887927] [2021-08-29 11:53:41,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-29 11:53:41,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 11:53:41,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-29 11:53:41,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-29 11:53:41,546 INFO L87 Difference]: Start difference. First operand has 31 states, 24 states have (on average 1.625) internal successors, (39), 30 states have internal predecessors, (39), 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 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:53:44,599 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.11s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:53:48,914 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.36s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:53:51,045 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:53:54,117 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:53:56,289 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:53:58,071 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:54:04,596 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:54:05,694 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:54:09,465 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:54:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:54:13,187 INFO L93 Difference]: Finished difference Result 63 states and 82 transitions. [2021-08-29 11:54:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-29 11:54:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-08-29 11:54:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:54:13,194 INFO L225 Difference]: With dead ends: 63 [2021-08-29 11:54:13,194 INFO L226 Difference]: Without dead ends: 30 [2021-08-29 11:54:13,195 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 4630.58ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-08-29 11:54:13,197 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 13 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30697.46ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 2.95ms SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31571.18ms IncrementalHoareTripleChecker+Time [2021-08-29 11:54:13,198 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 0 Invalid, 112 Unknown, 0 Unchecked, 2.95ms Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 6 Unknown, 0 Unchecked, 31571.18ms Time] [2021-08-29 11:54:13,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-29 11:54:13,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-08-29 11:54:13,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 28 states have internal predecessors, (29), 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) [2021-08-29 11:54:13,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-08-29 11:54:13,231 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 5 [2021-08-29 11:54:13,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:54:13,231 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-08-29 11:54:13,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:54:13,232 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-08-29 11:54:13,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-08-29 11:54:13,232 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:54:13,232 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:54:13,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-08-29 11:54:13,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 11:54:13,434 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 11:54:13,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:54:13,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1810815341, now seen corresponding path program 1 times [2021-08-29 11:54:13,436 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 11:54:13,436 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1343323575] [2021-08-29 11:54:13,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:54:13,449 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 11:54:13,449 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 11:54:13,452 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) [2021-08-29 11:54:13,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-08-29 11:54:14,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-29 11:54:14,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-29 11:54:14,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-29 11:54:16,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:54:16,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-08-29 11:54:23,004 WARN L838 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) is different from false [2021-08-29 11:54:25,047 WARN L860 $PredicateComparison]: unable to prove that (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) is different from true [2021-08-29 11:54:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-29 11:54:40,392 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-08-29 11:54:40,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1343323575] [2021-08-29 11:54:40,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1343323575] provided 2 perfect and 0 imperfect interpolant sequences [2021-08-29 11:54:40,392 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-08-29 11:54:40,392 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2021-08-29 11:54:40,392 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465619983] [2021-08-29 11:54:40,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-29 11:54:40,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-08-29 11:54:40,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-29 11:54:40,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=30, Unknown=2, NotChecked=10, Total=56 [2021-08-29 11:54:40,394 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:55:08,449 WARN L210 SmtUtils]: Spent 11.48s on a formula simplification that was a NOOP. DAG size: 27 [2021-08-29 11:55:10,539 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:55:13,957 WARN L860 $PredicateComparison]: unable to prove that (and (= c_ULTIMATE.start_main_~r~0 (_ bv1 32)) (not (= c_ULTIMATE.start___VERIFIER_assert_~cond (_ bv0 32))) (= c_ULTIMATE.start_main_~a~0 c_ULTIMATE.start_main_~x~0) (= (_ bv1 32) (bvadd (bvmul (_ bv4 32) (bvmul c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0 c_ULTIMATE.start_main_~r~0)) (bvneg (bvmul (bvmul c_ULTIMATE.start_main_~r~0 (_ bv6 32)) c_ULTIMATE.start_main_~r~0)) ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~x~0) (fp.mul c_currentRoundingMode .cse0 c_ULTIMATE.start_main_~a~0)))) (bvmul (_ bv3 32) c_ULTIMATE.start_main_~r~0))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from true [2021-08-29 11:55:16,779 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:55:19,036 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.07s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:55:22,463 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:55:24,638 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:55:27,047 WARN L515 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.27s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-08-29 11:55:27,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-29 11:55:27,244 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-08-29 11:55:27,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-29 11:55:27,245 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-08-29 11:55:27,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-29 11:55:27,245 INFO L225 Difference]: With dead ends: 33 [2021-08-29 11:55:27,245 INFO L226 Difference]: Without dead ends: 30 [2021-08-29 11:55:27,246 INFO L927 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 41851.20ms TimeCoverageRelationStatistics Valid=28, Invalid=65, Unknown=5, NotChecked=34, Total=132 [2021-08-29 11:55:27,248 INFO L928 BasicCegarLoop]: 0 mSDtfsCounter, 11 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 12 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15283.36ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 1.92ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 42 IncrementalHoareTripleChecker+Unchecked, 15789.92ms IncrementalHoareTripleChecker+Time [2021-08-29 11:55:27,248 INFO L929 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 0 Invalid, 117 Unknown, 0 Unchecked, 1.92ms Time], IncrementalHoareTripleChecker [12 Valid, 57 Invalid, 6 Unknown, 42 Unchecked, 15789.92ms Time] [2021-08-29 11:55:27,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-29 11:55:27,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-08-29 11:55:27,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 26 states have internal predecessors, (27), 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) [2021-08-29 11:55:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-08-29 11:55:27,255 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 7 [2021-08-29 11:55:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-29 11:55:27,255 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-08-29 11:55:27,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-29 11:55:27,256 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-08-29 11:55:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-08-29 11:55:27,256 INFO L505 BasicCegarLoop]: Found error trace [2021-08-29 11:55:27,256 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-29 11:55:27,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-08-29 11:55:27,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 11:55:27,463 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2021-08-29 11:55:27,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-29 11:55:27,463 INFO L82 PathProgramCache]: Analyzing trace with hash 731943696, now seen corresponding path program 1 times [2021-08-29 11:55:27,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-08-29 11:55:27,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [599685871] [2021-08-29 11:55:27,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-29 11:55:27,464 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-08-29 11:55:27,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-08-29 11:55:27,468 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) [2021-08-29 11:55:27,469 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-08-29 11:55:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 11:55:28,874 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-29 11:55:30,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-29 11:55:30,343 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-08-29 11:55:30,344 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-08-29 11:55:30,345 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (5 of 6 remaining) [2021-08-29 11:55:30,359 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2021-08-29 11:55:30,359 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2021-08-29 11:55:30,359 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2021-08-29 11:55:30,359 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2021-08-29 11:55:30,360 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2021-08-29 11:55:30,412 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-08-29 11:55:30,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-08-29 11:55:30,565 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-29 11:55:30,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.08 11:55:30 BoogieIcfgContainer [2021-08-29 11:55:30,591 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-29 11:55:30,591 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-08-29 11:55:30,591 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-08-29 11:55:30,591 INFO L275 PluginConnector]: Witness Printer initialized [2021-08-29 11:55:30,592 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.08 11:53:35" (3/4) ... [2021-08-29 11:55:30,594 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-08-29 11:55:30,650 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-08-29 11:55:30,651 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-08-29 11:55:30,651 INFO L158 Benchmark]: Toolchain (without parser) took 115632.55ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 37.6MB in the beginning and 38.3MB in the end (delta: -709.6kB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2021-08-29 11:55:30,652 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 44.0MB. Free memory was 26.1MB in the beginning and 26.1MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:55:30,652 INFO L158 Benchmark]: CACSL2BoogieTranslator took 171.77ms. Allocated memory is still 54.5MB. Free memory was 37.4MB in the beginning and 38.6MB in the end (delta: -1.1MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. [2021-08-29 11:55:30,652 INFO L158 Benchmark]: Boogie Procedure Inliner took 38.08ms. Allocated memory is still 54.5MB. Free memory was 38.6MB in the beginning and 36.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:55:30,653 INFO L158 Benchmark]: Boogie Preprocessor took 18.36ms. Allocated memory is still 54.5MB. Free memory was 36.9MB in the beginning and 35.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:55:30,653 INFO L158 Benchmark]: RCFGBuilder took 241.10ms. Allocated memory is still 54.5MB. Free memory was 35.3MB in the beginning and 25.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-08-29 11:55:30,653 INFO L158 Benchmark]: TraceAbstraction took 115097.58ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 25.4MB in the beginning and 40.4MB in the end (delta: -15.0MB). There was no memory consumed. Max. memory is 16.1GB. [2021-08-29 11:55:30,653 INFO L158 Benchmark]: Witness Printer took 59.50ms. Allocated memory is still 67.1MB. Free memory was 40.4MB in the beginning and 38.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-08-29 11:55:30,656 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 44.0MB. Free memory was 26.1MB in the beginning and 26.1MB in the end (delta: 50.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 171.77ms. Allocated memory is still 54.5MB. Free memory was 37.4MB in the beginning and 38.6MB in the end (delta: -1.1MB). Peak memory consumption was 13.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 38.08ms. Allocated memory is still 54.5MB. Free memory was 38.6MB in the beginning and 36.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 18.36ms. Allocated memory is still 54.5MB. Free memory was 36.9MB in the beginning and 35.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 241.10ms. Allocated memory is still 54.5MB. Free memory was 35.3MB in the beginning and 25.8MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 115097.58ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 25.4MB in the beginning and 40.4MB in the end (delta: -15.0MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 59.50ms. Allocated memory is still 67.1MB. Free memory was 40.4MB in the beginning and 38.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.00ms ErrorAutomatonConstructionTimeTotal, 0.00ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.00ms ErrorAutomatonConstructionTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeAvg, 0.00ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 19]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] x = a [L29] s = 3.25 [L30] r = 1 [L32] COND TRUE 1 [L17] COND FALSE !(!(cond)) [L17] COND FALSE !(!(cond)) [L17] COND TRUE !(cond) [L19] reach_error() - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 115013.13ms, OverallIterations: 3, TraceHistogramMax: 1, EmptinessCheckTime: 11.62ms, AutomataDifference: 78549.54ms, DeadEndRemovalTime: 0.00ms, HoareAnnotationTime: 0.00ms, InitialAbstractionConstructionTime: 8.02ms, PartialOrderReductionTime: 0.00ms, HoareTripleCheckerStatistics: 12 mSolverCounterUnknown, 24 SdHoareTripleChecker+Valid, 47361.10ms IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 24 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 45980.82ms Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 42 IncrementalHoareTripleChecker+Unchecked, 88 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 157 IncrementalHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 0 mSDtfsCounter, 157 mSolverCounterSat, 4.87ms SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 46481.78ms Time, 0.00ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=0, InterpolantAutomatonStates: 14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.00ms DumpTime, AutomataMinimizationStatistics: 19.08ms AutomataMinimizationTime, 2 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 38.35ms SsaConstructionTime, 2344.65ms SatisfiabilityAnalysisTime, 31753.23ms InterpolantComputationTime, 21 NumberOfCodeBlocks, 21 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 20 ConstructedInterpolants, 1 QuantifiedInterpolants, 209 SizeOfPredicates, 10 NumberOfNonLiveVariables, 63 ConjunctsInSsa, 12 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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 proved your program to be incorrect! [2021-08-29 11:55:30,858 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...