./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops/for_bounded_loop1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 791161d1 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/loops/for_bounded_loop1.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 d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 --- Real Ultimate output --- This is Ultimate 0.2.2-?-791161d [2022-07-22 15:05:05,570 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-22 15:05:05,572 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-22 15:05:05,609 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-22 15:05:05,609 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-22 15:05:05,610 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-22 15:05:05,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-22 15:05:05,613 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-22 15:05:05,614 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-22 15:05:05,615 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-22 15:05:05,616 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-22 15:05:05,617 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-22 15:05:05,617 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-22 15:05:05,618 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-22 15:05:05,619 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-22 15:05:05,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-22 15:05:05,621 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-22 15:05:05,622 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-22 15:05:05,623 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-22 15:05:05,625 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-22 15:05:05,626 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-22 15:05:05,627 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-22 15:05:05,627 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-22 15:05:05,628 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-22 15:05:05,629 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-22 15:05:05,631 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-22 15:05:05,632 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-22 15:05:05,632 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-22 15:05:05,633 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-22 15:05:05,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-22 15:05:05,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-22 15:05:05,634 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-22 15:05:05,635 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-22 15:05:05,635 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-22 15:05:05,636 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-22 15:05:05,637 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-22 15:05:05,637 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-22 15:05:05,638 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-22 15:05:05,638 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-22 15:05:05,638 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-22 15:05:05,639 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-22 15:05:05,640 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-22 15:05:05,640 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-22 15:05:05,656 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-22 15:05:05,657 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-22 15:05:05,657 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-22 15:05:05,657 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-22 15:05:05,658 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-22 15:05:05,658 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-22 15:05:05,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-22 15:05:05,659 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-22 15:05:05,659 INFO L138 SettingsManager]: * Use SBE=true [2022-07-22 15:05:05,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-22 15:05:05,659 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-22 15:05:05,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-22 15:05:05,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-22 15:05:05,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-22 15:05:05,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-22 15:05:05,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-22 15:05:05,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-22 15:05:05,661 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-22 15:05:05,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-22 15:05:05,661 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-22 15:05:05,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-22 15:05:05,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-22 15:05:05,662 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-22 15:05:05,662 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-22 15:05:05,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:05:05,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-22 15:05:05,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-22 15:05:05,663 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-22 15:05:05,663 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-22 15:05:05,663 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-22 15:05:05,663 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-22 15:05:05,663 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-22 15:05:05,664 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-22 15:05:05,664 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d362508cc6d10100af1abe34073a764b50319c9e1ae9c7cc9c70a242e3f5c8c4 [2022-07-22 15:05:05,866 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-22 15:05:05,889 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-22 15:05:05,891 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-22 15:05:05,892 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-22 15:05:05,893 INFO L275 PluginConnector]: CDTParser initialized [2022-07-22 15:05:05,894 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/loops/for_bounded_loop1.c [2022-07-22 15:05:05,958 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59e7805e/a7141f1cb3e34531809427bb5b803423/FLAG60278ad56 [2022-07-22 15:05:06,306 INFO L306 CDTParser]: Found 1 translation units. [2022-07-22 15:05:06,306 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/for_bounded_loop1.c [2022-07-22 15:05:06,311 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59e7805e/a7141f1cb3e34531809427bb5b803423/FLAG60278ad56 [2022-07-22 15:05:06,747 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f59e7805e/a7141f1cb3e34531809427bb5b803423 [2022-07-22 15:05:06,749 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-22 15:05:06,750 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-22 15:05:06,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-22 15:05:06,755 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-22 15:05:06,758 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-22 15:05:06,759 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:05:06" (1/1) ... [2022-07-22 15:05:06,759 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@428eb2f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:06, skipping insertion in model container [2022-07-22 15:05:06,760 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.07 03:05:06" (1/1) ... [2022-07-22 15:05:06,766 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-22 15:05:06,775 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-22 15:05:06,944 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/for_bounded_loop1.c[416,429] [2022-07-22 15:05:06,959 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:05:06,966 INFO L203 MainTranslator]: Completed pre-run [2022-07-22 15:05:06,984 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/loops/for_bounded_loop1.c[416,429] [2022-07-22 15:05:06,990 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-22 15:05:07,001 INFO L208 MainTranslator]: Completed translation [2022-07-22 15:05:07,002 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07 WrapperNode [2022-07-22 15:05:07,002 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-22 15:05:07,004 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-22 15:05:07,004 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-22 15:05:07,005 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-22 15:05:07,011 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,016 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,030 INFO L137 Inliner]: procedures = 14, calls = 10, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 38 [2022-07-22 15:05:07,030 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-22 15:05:07,031 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-22 15:05:07,031 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-22 15:05:07,031 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-22 15:05:07,037 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,039 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,040 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,047 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,052 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-22 15:05:07,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-22 15:05:07,060 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-22 15:05:07,060 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-22 15:05:07,061 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (1/1) ... [2022-07-22 15:05:07,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-22 15:05:07,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-22 15:05:07,085 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-22 15:05:07,096 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-22 15:05:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-22 15:05:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-22 15:05:07,135 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-22 15:05:07,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-22 15:05:07,136 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-07-22 15:05:07,136 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-07-22 15:05:07,178 INFO L234 CfgBuilder]: Building ICFG [2022-07-22 15:05:07,179 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-22 15:05:07,254 INFO L275 CfgBuilder]: Performing block encoding [2022-07-22 15:05:07,259 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-22 15:05:07,259 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-07-22 15:05:07,261 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:05:07 BoogieIcfgContainer [2022-07-22 15:05:07,261 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-22 15:05:07,262 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-22 15:05:07,263 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-22 15:05:07,265 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-22 15:05:07,265 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.07 03:05:06" (1/3) ... [2022-07-22 15:05:07,266 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4982ddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:05:07, skipping insertion in model container [2022-07-22 15:05:07,266 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.07 03:05:07" (2/3) ... [2022-07-22 15:05:07,267 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4982ddd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.07 03:05:07, skipping insertion in model container [2022-07-22 15:05:07,267 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:05:07" (3/3) ... [2022-07-22 15:05:07,268 INFO L111 eAbstractionObserver]: Analyzing ICFG for_bounded_loop1.c [2022-07-22 15:05:07,279 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-22 15:05:07,280 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-22 15:05:07,316 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-22 15:05:07,322 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@68ba0893, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@57eb0f38 [2022-07-22 15:05:07,323 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-07-22 15:05:07,326 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 15:05:07,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 15:05:07,331 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:05:07,332 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:05:07,332 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:05:07,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:05:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash 194354858, now seen corresponding path program 1 times [2022-07-22 15:05:07,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:05:07,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202730993] [2022-07-22 15:05:07,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:05:07,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:05:07,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:05:07,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:05:07,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:05:07,441 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202730993] [2022-07-22 15:05:07,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202730993] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:05:07,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:05:07,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-22 15:05:07,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521421870] [2022-07-22 15:05:07,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:05:07,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-22 15:05:07,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:05:07,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-22 15:05:07,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:05:07,482 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:05:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:05:07,499 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-07-22 15:05:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-22 15:05:07,501 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 15:05:07,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:05:07,507 INFO L225 Difference]: With dead ends: 35 [2022-07-22 15:05:07,507 INFO L226 Difference]: Without dead ends: 16 [2022-07-22 15:05:07,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-22 15:05:07,514 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:05:07,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:05:07,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-07-22 15:05:07,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-07-22 15:05:07,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:05:07,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-07-22 15:05:07,544 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 8 [2022-07-22 15:05:07,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:05:07,545 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-07-22 15:05:07,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:05:07,546 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-07-22 15:05:07,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 15:05:07,547 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:05:07,547 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:05:07,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-22 15:05:07,548 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:05:07,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:05:07,549 INFO L85 PathProgramCache]: Analyzing trace with hash 181425564, now seen corresponding path program 1 times [2022-07-22 15:05:07,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:05:07,550 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590056702] [2022-07-22 15:05:07,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:05:07,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:05:07,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:05:07,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:05:07,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:05:07,664 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590056702] [2022-07-22 15:05:07,664 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590056702] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:05:07,664 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:05:07,665 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-07-22 15:05:07,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783808267] [2022-07-22 15:05:07,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:05:07,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-07-22 15:05:07,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:05:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-07-22 15:05:07,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:05:07,667 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:05:07,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:05:07,681 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2022-07-22 15:05:07,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-07-22 15:05:07,682 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 15:05:07,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:05:07,682 INFO L225 Difference]: With dead ends: 29 [2022-07-22 15:05:07,683 INFO L226 Difference]: Without dead ends: 22 [2022-07-22 15:05:07,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-07-22 15:05:07,684 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:05:07,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 31 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:05:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-07-22 15:05:07,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2022-07-22 15:05:07,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 13 states have internal predecessors, (14), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-07-22 15:05:07,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-07-22 15:05:07,691 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 8 [2022-07-22 15:05:07,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:05:07,691 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-07-22 15:05:07,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:05:07,691 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-07-22 15:05:07,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-07-22 15:05:07,692 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:05:07,692 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:05:07,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-22 15:05:07,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:05:07,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:05:07,693 INFO L85 PathProgramCache]: Analyzing trace with hash 183153442, now seen corresponding path program 1 times [2022-07-22 15:05:07,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:05:07,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931557857] [2022-07-22 15:05:07,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:05:07,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:05:07,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:05:07,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:05:07,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:05:07,769 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931557857] [2022-07-22 15:05:07,770 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931557857] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:05:07,770 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:05:07,770 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-22 15:05:07,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767207685] [2022-07-22 15:05:07,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:05:07,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-22 15:05:07,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:05:07,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-22 15:05:07,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-07-22 15:05:07,772 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:05:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:05:07,816 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2022-07-22 15:05:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-07-22 15:05:07,817 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-07-22 15:05:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:05:07,818 INFO L225 Difference]: With dead ends: 26 [2022-07-22 15:05:07,818 INFO L226 Difference]: Without dead ends: 24 [2022-07-22 15:05:07,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:05:07,820 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 8 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:05:07,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 46 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:05:07,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-07-22 15:05:07,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2022-07-22 15:05:07,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-07-22 15:05:07,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-07-22 15:05:07,825 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 8 [2022-07-22 15:05:07,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:05:07,826 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-07-22 15:05:07,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-07-22 15:05:07,826 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-07-22 15:05:07,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-07-22 15:05:07,827 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:05:07,827 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:05:07,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-22 15:05:07,827 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:05:07,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:05:07,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1335896453, now seen corresponding path program 1 times [2022-07-22 15:05:07,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:05:07,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596745530] [2022-07-22 15:05:07,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:05:07,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:05:07,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:05:07,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-07-22 15:05:07,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-22 15:05:07,968 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-22 15:05:07,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-22 15:05:07,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596745530] [2022-07-22 15:05:07,969 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596745530] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-22 15:05:07,969 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-22 15:05:07,969 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-07-22 15:05:07,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304486204] [2022-07-22 15:05:07,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-22 15:05:07,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-07-22 15:05:07,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-22 15:05:07,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-07-22 15:05:07,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-07-22 15:05:07,971 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 15:05:08,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-07-22 15:05:08,025 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2022-07-22 15:05:08,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-22 15:05:08,025 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-07-22 15:05:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-07-22 15:05:08,026 INFO L225 Difference]: With dead ends: 34 [2022-07-22 15:05:08,026 INFO L226 Difference]: Without dead ends: 32 [2022-07-22 15:05:08,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-22 15:05:08,028 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 9 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-07-22 15:05:08,029 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 62 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-07-22 15:05:08,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-07-22 15:05:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-07-22 15:05:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 22 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2022-07-22 15:05:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-07-22 15:05:08,036 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 15 [2022-07-22 15:05:08,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-07-22 15:05:08,036 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-07-22 15:05:08,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-07-22 15:05:08,037 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-07-22 15:05:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-07-22 15:05:08,037 INFO L187 NwaCegarLoop]: Found error trace [2022-07-22 15:05:08,037 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-22 15:05:08,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-07-22 15:05:08,038 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-07-22 15:05:08,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-22 15:05:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash -1291608463, now seen corresponding path program 1 times [2022-07-22 15:05:08,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-22 15:05:08,039 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434061219] [2022-07-22 15:05:08,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-22 15:05:08,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-22 15:05:08,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 15:05:08,057 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-07-22 15:05:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-07-22 15:05:08,088 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-07-22 15:05:08,088 INFO L271 BasicCegarLoop]: Counterexample is feasible [2022-07-22 15:05:08,089 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-07-22 15:05:08,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-22 15:05:08,096 INFO L356 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1] [2022-07-22 15:05:08,101 INFO L176 ceAbstractionStarter]: Computing trace abstraction results [2022-07-22 15:05:08,124 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.07 03:05:08 BoogieIcfgContainer [2022-07-22 15:05:08,125 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-07-22 15:05:08,125 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-07-22 15:05:08,125 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-07-22 15:05:08,126 INFO L275 PluginConnector]: Witness Printer initialized [2022-07-22 15:05:08,126 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.07 03:05:07" (3/4) ... [2022-07-22 15:05:08,128 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-07-22 15:05:08,155 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2022-07-22 15:05:08,156 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-07-22 15:05:08,156 INFO L158 Benchmark]: Toolchain (without parser) took 1406.23ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 73.1MB in the beginning and 113.2MB in the end (delta: -40.1MB). Peak memory consumption was 337.2kB. Max. memory is 16.1GB. [2022-07-22 15:05:08,157 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 109.1MB. Free memory was 82.4MB in the beginning and 82.3MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:05:08,157 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.93ms. Allocated memory is still 109.1MB. Free memory was 72.8MB in the beginning and 83.6MB in the end (delta: -10.8MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. [2022-07-22 15:05:08,158 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.07ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 82.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-07-22 15:05:08,158 INFO L158 Benchmark]: Boogie Preprocessor took 27.25ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 80.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:05:08,158 INFO L158 Benchmark]: RCFGBuilder took 201.68ms. Allocated memory is still 109.1MB. Free memory was 80.8MB in the beginning and 71.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-07-22 15:05:08,159 INFO L158 Benchmark]: TraceAbstraction took 862.40ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 71.0MB in the beginning and 114.4MB in the end (delta: -43.3MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:05:08,159 INFO L158 Benchmark]: Witness Printer took 30.51ms. Allocated memory is still 151.0MB. Free memory was 114.4MB in the beginning and 113.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2022-07-22 15:05:08,161 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 109.1MB. Free memory was 82.4MB in the beginning and 82.3MB in the end (delta: 26.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 246.93ms. Allocated memory is still 109.1MB. Free memory was 72.8MB in the beginning and 83.6MB in the end (delta: -10.8MB). Peak memory consumption was 9.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.07ms. Allocated memory is still 109.1MB. Free memory was 83.6MB in the beginning and 82.1MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 27.25ms. Allocated memory is still 109.1MB. Free memory was 82.1MB in the beginning and 80.8MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 201.68ms. Allocated memory is still 109.1MB. Free memory was 80.8MB in the beginning and 71.6MB in the end (delta: 9.2MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 862.40ms. Allocated memory was 109.1MB in the beginning and 151.0MB in the end (delta: 41.9MB). Free memory was 71.0MB in the beginning and 114.4MB in the end (delta: -43.3MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 30.51ms. Allocated memory is still 151.0MB. Free memory was 114.4MB in the beginning and 113.2MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 11]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L19] int i=0, x=0, y=0; [L20] int n=__VERIFIER_nondet_int(); [L21] COND FALSE !(!(n>0)) [L22] i=0 VAL [i=0, n=1, x=0, y=0] [L22] COND TRUE i