./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 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-scaling/freire2_valuebound1.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 ff5daa36c47d3acf04ff127d3f9a6e17688f7f254f16d34cb2769aec1ca052fe --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:20:32,751 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:20:32,754 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:20:32,798 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:20:32,798 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:20:32,801 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:20:32,803 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:20:32,807 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:20:32,810 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:20:32,813 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:20:32,814 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:20:32,818 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:20:32,818 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:20:32,820 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:20:32,821 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:20:32,822 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:20:32,823 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:20:32,823 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:20:32,827 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:20:32,832 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:20:32,833 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:20:32,834 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:20:32,834 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:20:32,836 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:20:32,840 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:20:32,842 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:20:32,842 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:20:32,843 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:20:32,844 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:20:32,844 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:20:32,845 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:20:32,845 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:20:32,846 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:20:32,847 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:20:32,848 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:20:32,848 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:20:32,849 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:20:32,849 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:20:32,850 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:20:32,851 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:20:32,851 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:20:32,856 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-28 00:20:32,890 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:20:32,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:20:32,891 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:20:32,891 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:20:32,891 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:20:32,892 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:20:32,892 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:20:32,892 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:20:32,892 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:20:32,892 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:20:32,893 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:20:32,893 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-28 00:20:32,893 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:20:32,893 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:20:32,893 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:20:32,893 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:20:32,893 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:20:32,894 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:20:32,894 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:20:32,894 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:20:32,894 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:20:32,894 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:20:32,894 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:20:32,894 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:20:32,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:20:32,894 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:20:32,894 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:20:32,895 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:20:32,895 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-28 00:20:32,895 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-28 00:20:32,895 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:20:32,895 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:20:32,895 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:20:32,895 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5daa36c47d3acf04ff127d3f9a6e17688f7f254f16d34cb2769aec1ca052fe [2021-12-28 00:20:33,186 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:20:33,214 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:20:33,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:20:33,218 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:20:33,220 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:20:33,221 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound1.c [2021-12-28 00:20:33,270 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595d910d9/3dc5da55771449da83b0a00297c9b1ac/FLAG59686df2e [2021-12-28 00:20:33,659 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:20:33,660 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound1.c [2021-12-28 00:20:33,669 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595d910d9/3dc5da55771449da83b0a00297c9b1ac/FLAG59686df2e [2021-12-28 00:20:33,682 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/595d910d9/3dc5da55771449da83b0a00297c9b1ac [2021-12-28 00:20:33,684 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:20:33,685 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:20:33,686 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:20:33,687 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:20:33,690 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:20:33,690 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@333166a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33, skipping insertion in model container [2021-12-28 00:20:33,691 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,697 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:20:33,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:20:33,806 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/nla-digbench-scaling/freire2_valuebound1.c[709,722] [2021-12-28 00:20:33,823 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:20:33,829 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:20:33,839 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/nla-digbench-scaling/freire2_valuebound1.c[709,722] [2021-12-28 00:20:33,847 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:20:33,862 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:20:33,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33 WrapperNode [2021-12-28 00:20:33,863 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:20:33,864 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:20:33,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:20:33,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:20:33,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,878 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,903 INFO L137 Inliner]: procedures = 14, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 40 [2021-12-28 00:20:33,904 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:20:33,904 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:20:33,905 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:20:33,905 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:20:33,911 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,911 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,928 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,930 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,934 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:20:33,935 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:20:33,936 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:20:33,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:20:33,937 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (1/1) ... [2021-12-28 00:20:33,943 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:20:33,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:20:33,966 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 00:20:33,992 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 00:20:34,005 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:20:34,005 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-28 00:20:34,005 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:20:34,005 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:20:34,005 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 00:20:34,006 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 00:20:34,059 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:20:34,060 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:20:34,173 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:20:34,187 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:20:34,188 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 00:20:34,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:20:34 BoogieIcfgContainer [2021-12-28 00:20:34,190 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:20:34,191 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:20:34,191 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:20:34,193 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:20:34,207 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:20:33" (1/3) ... [2021-12-28 00:20:34,208 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244ad24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:20:34, skipping insertion in model container [2021-12-28 00:20:34,208 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:33" (2/3) ... [2021-12-28 00:20:34,209 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@244ad24e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:20:34, skipping insertion in model container [2021-12-28 00:20:34,209 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:20:34" (3/3) ... [2021-12-28 00:20:34,210 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_valuebound1.c [2021-12-28 00:20:34,214 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:20:34,214 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:20:34,281 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:20:34,288 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 00:20:34,289 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:20:34,312 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 00:20:34,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 00:20:34,315 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:20:34,316 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:20:34,317 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:20:34,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:20:34,325 INFO L85 PathProgramCache]: Analyzing trace with hash -589224774, now seen corresponding path program 1 times [2021-12-28 00:20:34,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:20:34,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899121485] [2021-12-28 00:20:34,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:20:34,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:20:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:20:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:20:34,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-28 00:20:34,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899121485] [2021-12-28 00:20:34,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899121485] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:20:34,479 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:20:34,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 00:20:34,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813599130] [2021-12-28 00:20:34,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:20:34,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:20:34,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-28 00:20:34,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:20:34,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:20:34,515 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-28 00:20:34,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:20:34,536 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2021-12-28 00:20:34,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:20:34,539 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2021-12-28 00:20:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:20:34,545 INFO L225 Difference]: With dead ends: 41 [2021-12-28 00:20:34,545 INFO L226 Difference]: Without dead ends: 18 [2021-12-28 00:20:34,548 INFO L932 BasicCegarLoop]: 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 [2021-12-28 00:20:34,553 INFO L933 BasicCegarLoop]: 27 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, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:20:34,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:20:34,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-28 00:20:34,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-28 00:20:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 00:20:34,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-12-28 00:20:34,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2021-12-28 00:20:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:20:34,592 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-12-28 00:20:34,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-28 00:20:34,593 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-12-28 00:20:34,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 00:20:34,593 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:20:34,594 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:20:34,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-28 00:20:34,595 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:20:34,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:20:34,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1187450884, now seen corresponding path program 1 times [2021-12-28 00:20:34,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-28 00:20:34,598 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278868411] [2021-12-28 00:20:34,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:20:34,598 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-28 00:20:34,623 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-28 00:20:34,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1607605568] [2021-12-28 00:20:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:20:34,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:20:34,625 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:20:34,631 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-28 00:20:34,667 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-28 00:20:34,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 00:20:34,690 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-28 00:20:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-28 00:20:34,718 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-28 00:20:34,719 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-28 00:20:34,721 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-28 00:20:34,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-28 00:20:34,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-28 00:20:34,948 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-28 00:20:34,951 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-28 00:20:34,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.12 12:20:34 BoogieIcfgContainer [2021-12-28 00:20:34,970 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-28 00:20:34,972 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-28 00:20:34,972 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-28 00:20:34,972 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-28 00:20:34,973 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:20:34" (3/4) ... [2021-12-28 00:20:34,975 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-28 00:20:34,975 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-28 00:20:34,977 INFO L158 Benchmark]: Toolchain (without parser) took 1290.74ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 44.1MB in the beginning and 39.4MB in the end (delta: 4.7MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2021-12-28 00:20:34,978 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 62.9MB. Free memory was 45.5MB in the beginning and 45.5MB in the end (delta: 49.1kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 00:20:34,982 INFO L158 Benchmark]: CACSL2BoogieTranslator took 177.12ms. Allocated memory is still 62.9MB. Free memory was 44.0MB in the beginning and 47.3MB in the end (delta: -3.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-12-28 00:20:34,983 INFO L158 Benchmark]: Boogie Procedure Inliner took 39.70ms. Allocated memory is still 62.9MB. Free memory was 47.3MB in the beginning and 45.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-28 00:20:34,983 INFO L158 Benchmark]: Boogie Preprocessor took 30.43ms. Allocated memory is still 62.9MB. Free memory was 45.6MB in the beginning and 44.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 00:20:34,983 INFO L158 Benchmark]: RCFGBuilder took 254.26ms. Allocated memory is still 62.9MB. Free memory was 44.5MB in the beginning and 35.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-28 00:20:34,984 INFO L158 Benchmark]: TraceAbstraction took 779.82ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 34.7MB in the beginning and 39.7MB in the end (delta: -5.0MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. [2021-12-28 00:20:34,984 INFO L158 Benchmark]: Witness Printer took 3.96ms. Allocated memory is still 75.5MB. Free memory was 39.7MB in the beginning and 39.4MB in the end (delta: 311.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-28 00:20:34,986 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 62.9MB. Free memory was 45.5MB in the beginning and 45.5MB in the end (delta: 49.1kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 177.12ms. Allocated memory is still 62.9MB. Free memory was 44.0MB in the beginning and 47.3MB in the end (delta: -3.3MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 39.70ms. Allocated memory is still 62.9MB. Free memory was 47.3MB in the beginning and 45.6MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 30.43ms. Allocated memory is still 62.9MB. Free memory was 45.6MB in the beginning and 44.5MB in the end (delta: 1.1MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 254.26ms. Allocated memory is still 62.9MB. Free memory was 44.5MB in the beginning and 35.2MB in the end (delta: 9.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 779.82ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 34.7MB in the beginning and 39.7MB in the end (delta: -5.0MB). Peak memory consumption was 7.7MB. Max. memory is 16.1GB. * Witness Printer took 3.96ms. Allocated memory is still 75.5MB. Free memory was 39.7MB in the beginning and 39.4MB in the end (delta: 311.6kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 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 34, overapproximation of someBinaryDOUBLEComparisonOperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x, s; [L27] a = __VERIFIER_nondet_double() [L28] CALL assume_abort_if_not(a>=0 && a<=1) [L14] COND FALSE !(!cond) VAL [\old(cond)=1, cond=1] [L28] RET assume_abort_if_not(a>=0 && a<=1) [L29] x = a [L30] s = 3.25 [L31] r = 1 VAL [a=2, r=1, s=13/4, x=2] [L33] COND TRUE 1 VAL [a=2, r=1, s=13/4, x=2] [L34] CALL __VERIFIER_assert((int)(4*s) - 12*r*r == 1) VAL [\old(cond)=0] [L17] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L19] reach_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.7s, OverallIterations: 2, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 27 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 0 IncrementalHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 27 mSDtfsCounter, 0 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred in iteration=0, InterpolantAutomatonStates: 2, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 1 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.0s InterpolantComputationTime, 18 NumberOfCodeBlocks, 18 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 8 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-12-28 00:20:35,034 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound1.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 ff5daa36c47d3acf04ff127d3f9a6e17688f7f254f16d34cb2769aec1ca052fe --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-28 00:20:36,844 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-28 00:20:36,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-28 00:20:36,894 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-28 00:20:36,894 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-28 00:20:36,897 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-28 00:20:36,898 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-28 00:20:36,903 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-28 00:20:36,905 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-28 00:20:36,909 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-28 00:20:36,910 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-28 00:20:36,913 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-28 00:20:36,913 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-28 00:20:36,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-28 00:20:36,917 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-28 00:20:36,919 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-28 00:20:36,920 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-28 00:20:36,921 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-28 00:20:36,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-28 00:20:36,928 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-28 00:20:36,929 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-28 00:20:36,930 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-28 00:20:36,932 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-28 00:20:36,933 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-28 00:20:36,935 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-28 00:20:36,935 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-28 00:20:36,935 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-28 00:20:36,936 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-28 00:20:36,936 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-28 00:20:36,937 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-28 00:20:36,938 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-28 00:20:36,938 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-28 00:20:36,940 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-28 00:20:36,940 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-28 00:20:36,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-28 00:20:36,941 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-28 00:20:36,942 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-28 00:20:36,942 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-28 00:20:36,943 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-28 00:20:36,944 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-28 00:20:36,944 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-28 00:20:36,945 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-28 00:20:36,980 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-28 00:20:36,981 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-28 00:20:36,981 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-28 00:20:36,982 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-28 00:20:36,982 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-28 00:20:36,983 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-28 00:20:36,984 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-28 00:20:36,984 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-28 00:20:36,984 INFO L138 SettingsManager]: * Use SBE=true [2021-12-28 00:20:36,984 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-28 00:20:36,985 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-28 00:20:36,985 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-28 00:20:36,986 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-28 00:20:36,986 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-28 00:20:36,986 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-28 00:20:36,986 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-28 00:20:36,986 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-28 00:20:36,986 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-28 00:20:36,987 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-28 00:20:36,987 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-28 00:20:36,987 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-28 00:20:36,987 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-28 00:20:36,987 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-28 00:20:36,988 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-28 00:20:36,988 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-28 00:20:36,988 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-28 00:20:36,988 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:20:36,988 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-28 00:20:36,989 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-28 00:20:36,989 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-28 00:20:36,989 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-28 00:20:36,989 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-28 00:20:36,990 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-28 00:20:36,990 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-28 00:20:36,990 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-28 00:20:36,990 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-28 00:20:36,990 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff5daa36c47d3acf04ff127d3f9a6e17688f7f254f16d34cb2769aec1ca052fe [2021-12-28 00:20:37,275 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-28 00:20:37,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-28 00:20:37,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-28 00:20:37,300 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-28 00:20:37,301 INFO L275 PluginConnector]: CDTParser initialized [2021-12-28 00:20:37,302 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound1.c [2021-12-28 00:20:37,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69fe419c3/c785ae23cfeb43f7abdc1df2987bfea4/FLAGecaa26c38 [2021-12-28 00:20:37,656 INFO L306 CDTParser]: Found 1 translation units. [2021-12-28 00:20:37,657 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/freire2_valuebound1.c [2021-12-28 00:20:37,663 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69fe419c3/c785ae23cfeb43f7abdc1df2987bfea4/FLAGecaa26c38 [2021-12-28 00:20:38,099 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/69fe419c3/c785ae23cfeb43f7abdc1df2987bfea4 [2021-12-28 00:20:38,101 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-28 00:20:38,102 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-28 00:20:38,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-28 00:20:38,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-28 00:20:38,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-28 00:20:38,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,114 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6492c830 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38, skipping insertion in model container [2021-12-28 00:20:38,115 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,121 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-28 00:20:38,136 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-28 00:20:38,254 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/nla-digbench-scaling/freire2_valuebound1.c[709,722] [2021-12-28 00:20:38,285 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:20:38,298 INFO L203 MainTranslator]: Completed pre-run [2021-12-28 00:20:38,311 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/nla-digbench-scaling/freire2_valuebound1.c[709,722] [2021-12-28 00:20:38,338 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-28 00:20:38,354 INFO L208 MainTranslator]: Completed translation [2021-12-28 00:20:38,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38 WrapperNode [2021-12-28 00:20:38,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-28 00:20:38,357 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-28 00:20:38,358 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-28 00:20:38,358 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-28 00:20:38,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,377 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,401 INFO L137 Inliner]: procedures = 15, calls = 14, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 41 [2021-12-28 00:20:38,401 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-28 00:20:38,402 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-28 00:20:38,403 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-28 00:20:38,403 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-28 00:20:38,409 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,416 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,433 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,436 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,441 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-28 00:20:38,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-28 00:20:38,443 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-28 00:20:38,443 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-28 00:20:38,443 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (1/1) ... [2021-12-28 00:20:38,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-28 00:20:38,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-28 00:20:38,472 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-28 00:20:38,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-28 00:20:38,513 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-28 00:20:38,513 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-28 00:20:38,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-28 00:20:38,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-28 00:20:38,513 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-28 00:20:38,514 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-28 00:20:38,559 INFO L234 CfgBuilder]: Building ICFG [2021-12-28 00:20:38,560 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-28 00:20:39,013 INFO L275 CfgBuilder]: Performing block encoding [2021-12-28 00:20:39,017 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-28 00:20:39,018 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-28 00:20:39,019 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:20:39 BoogieIcfgContainer [2021-12-28 00:20:39,019 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-28 00:20:39,021 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-28 00:20:39,021 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-28 00:20:39,023 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-28 00:20:39,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.12 12:20:38" (1/3) ... [2021-12-28 00:20:39,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21706d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:20:39, skipping insertion in model container [2021-12-28 00:20:39,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.12 12:20:38" (2/3) ... [2021-12-28 00:20:39,025 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21706d58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.12 12:20:39, skipping insertion in model container [2021-12-28 00:20:39,025 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.12 12:20:39" (3/3) ... [2021-12-28 00:20:39,026 INFO L111 eAbstractionObserver]: Analyzing ICFG freire2_valuebound1.c [2021-12-28 00:20:39,030 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-28 00:20:39,031 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-28 00:20:39,066 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-28 00:20:39,072 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-28 00:20:39,073 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-28 00:20:39,083 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-12-28 00:20:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 00:20:39,086 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:20:39,087 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:20:39,087 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:20:39,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:20:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash -589224774, now seen corresponding path program 1 times [2021-12-28 00:20:39,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 00:20:39,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1458060959] [2021-12-28 00:20:39,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:20:39,102 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 00:20:39,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 00:20:39,115 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 00:20:39,167 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-28 00:20:39,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:20:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-28 00:20:39,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:20:39,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:20:39,391 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:20:39,391 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 00:20:39,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1458060959] [2021-12-28 00:20:39,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1458060959] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:20:39,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:20:39,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-28 00:20:39,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597427724] [2021-12-28 00:20:39,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:20:39,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-28 00:20:39,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 00:20:39,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-28 00:20:39,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:20:39,436 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-28 00:20:39,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:20:39,456 INFO L93 Difference]: Finished difference Result 41 states and 64 transitions. [2021-12-28 00:20:39,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-28 00:20:39,458 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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 9 [2021-12-28 00:20:39,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:20:39,469 INFO L225 Difference]: With dead ends: 41 [2021-12-28 00:20:39,470 INFO L226 Difference]: Without dead ends: 18 [2021-12-28 00:20:39,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-28 00:20:39,477 INFO L933 BasicCegarLoop]: 27 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, 27 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-28 00:20:39,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-28 00:20:39,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-12-28 00:20:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-12-28 00:20:39,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 6 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-28 00:20:39,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2021-12-28 00:20:39,518 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 9 [2021-12-28 00:20:39,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:20:39,519 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2021-12-28 00:20:39,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 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) [2021-12-28 00:20:39,519 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2021-12-28 00:20:39,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-12-28 00:20:39,520 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:20:39,521 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:20:39,532 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-28 00:20:39,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 00:20:39,726 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:20:39,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:20:39,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1187450884, now seen corresponding path program 1 times [2021-12-28 00:20:39,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 00:20:39,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [70403745] [2021-12-28 00:20:39,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:20:39,728 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 00:20:39,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 00:20:39,730 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 00:20:39,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-28 00:20:39,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:20:39,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-28 00:20:39,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:20:39,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:20:39,989 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-28 00:20:39,989 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 00:20:39,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [70403745] [2021-12-28 00:20:39,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [70403745] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-28 00:20:39,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-28 00:20:39,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-28 00:20:39,990 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336835505] [2021-12-28 00:20:39,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:20:39,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-28 00:20:39,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 00:20:39,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-28 00:20:39,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-12-28 00:20:39,993 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-12-28 00:20:42,589 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:20:44,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:20:46,597 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:20:49,039 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:20:51,045 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:20:53,457 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.41s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:20:55,758 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:20:59,010 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.09s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:21:01,309 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.30s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-28 00:21:01,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-28 00:21:01,311 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2021-12-28 00:21:01,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-28 00:21:01,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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 9 [2021-12-28 00:21:01,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-28 00:21:01,437 INFO L225 Difference]: With dead ends: 34 [2021-12-28 00:21:01,437 INFO L226 Difference]: Without dead ends: 32 [2021-12-28 00:21:01,437 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-12-28 00:21:01,438 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2021-12-28 00:21:01,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 72 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 8 Unknown, 0 Unchecked, 21.2s Time] [2021-12-28 00:21:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-12-28 00:21:01,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-12-28 00:21:01,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 19 states have internal predecessors, (20), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-28 00:21:01,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-12-28 00:21:01,449 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 9 [2021-12-28 00:21:01,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-28 00:21:01,450 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-12-28 00:21:01,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 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) [2021-12-28 00:21:01,451 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-12-28 00:21:01,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-12-28 00:21:01,451 INFO L506 BasicCegarLoop]: Found error trace [2021-12-28 00:21:01,451 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-28 00:21:01,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-28 00:21:01,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-28 00:21:01,652 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-28 00:21:01,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-28 00:21:01,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1170702338, now seen corresponding path program 1 times [2021-12-28 00:21:01,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-28 00:21:01,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [88368323] [2021-12-28 00:21:01,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-28 00:21:01,654 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-28 00:21:01,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-28 00:21:01,655 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-28 00:21:01,655 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-28 00:21:02,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-28 00:21:02,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 9 conjunts are in the unsatisfiable core [2021-12-28 00:21:02,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-28 00:21:04,576 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:21:04,577 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-28 00:21:10,930 WARN L838 $PredicateComparison]: unable to prove that (= (bvadd (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ 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#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~r~0#1|)) |c_ULTIMATE.start_main_~r~0#1|) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from false [2021-12-28 00:21:12,975 WARN L860 $PredicateComparison]: unable to prove that (= (bvadd (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ 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#1|) (fp.mul c_currentRoundingMode .cse0 |c_ULTIMATE.start_main_~a~0#1|)))) (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~r~0#1|)) |c_ULTIMATE.start_main_~r~0#1|) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32)) is different from true [2021-12-28 00:21:24,130 WARN L860 $PredicateComparison]: unable to prove that (= (bvadd ((_ fp.to_sbv 32) roundTowardZero (let ((.cse0 (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)) |c_ULTIMATE.start_main_~a~0#1|))) (fp.sub c_currentRoundingMode .cse0 .cse0))) (_ bv1 32)) (_ bv1 32)) is different from true [2021-12-28 00:21:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-28 00:21:36,650 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-28 00:21:36,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [88368323] [2021-12-28 00:21:36,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [88368323] provided 1 perfect and 1 imperfect interpolant sequences [2021-12-28 00:21:36,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-28 00:21:36,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7] total 13 [2021-12-28 00:21:36,651 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291865471] [2021-12-28 00:21:36,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-28 00:21:36,651 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-28 00:21:36,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-28 00:21:36,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-28 00:21:36,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=83, Unknown=3, NotChecked=38, Total=156 [2021-12-28 00:21:36,652 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 6 states have internal predecessors, (11), 1 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) [2021-12-28 00:21:47,932 WARN L838 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (let ((.cse0 (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~a~0#1|))) (and (or (= (bvadd ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode .cse0 .cse0)) (_ bv1 32)) (_ bv1 32)) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (= (bvadd (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~x~0#1|) .cse0)) (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~r~0#1|)) |c_ULTIMATE.start_main_~r~0#1|) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32))))) is different from false [2021-12-28 00:21:49,984 WARN L860 $PredicateComparison]: unable to prove that (let ((.cse1 ((_ to_fp 11 53) c_currentRoundingMode (_ bv4 32)))) (let ((.cse0 (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~a~0#1|))) (and (or (= (bvadd ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode .cse0 .cse0)) (_ bv1 32)) (_ bv1 32)) (= |c_ULTIMATE.start_assume_abort_if_not_~cond#1| (_ bv0 32))) (= (bvadd (bvneg (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv6 32) |c_ULTIMATE.start_main_~r~0#1|))) ((_ fp.to_sbv 32) roundTowardZero (fp.sub c_currentRoundingMode (fp.mul c_currentRoundingMode .cse1 |c_ULTIMATE.start_main_~x~0#1|) .cse0)) (bvmul (bvmul |c_ULTIMATE.start_main_~r~0#1| (bvmul (_ bv4 32) |c_ULTIMATE.start_main_~r~0#1|)) |c_ULTIMATE.start_main_~r~0#1|) (bvmul (_ bv3 32) |c_ULTIMATE.start_main_~r~0#1|)) (_ bv1 32))))) is different from true