./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/freire1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ff03de63 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/freire1.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 a69393ce5fe75f7ab01b3582ad0675909e9396d47152d54bb12cb1909ec8c6ec --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:26:41,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:26:41,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:26:41,478 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:26:41,478 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:26:41,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:26:41,482 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:26:41,484 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:26:41,485 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:26:41,488 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:26:41,489 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:26:41,490 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:26:41,490 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:26:41,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:26:41,493 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:26:41,495 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:26:41,496 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:26:41,497 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:26:41,498 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:26:41,503 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:26:41,504 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:26:41,504 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:26:41,505 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:26:41,506 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:26:41,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:26:41,511 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:26:41,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:26:41,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:26:41,512 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:26:41,513 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:26:41,513 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:26:41,514 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:26:41,515 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:26:41,516 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:26:41,517 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:26:41,517 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:26:41,517 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:26:41,518 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:26:41,518 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:26:41,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:26:41,519 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:26:41,521 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-21 12:26:41,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:26:41,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:26:41,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:26:41,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:26:41,547 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:26:41,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:26:41,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:26:41,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:26:41,548 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:26:41,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:26:41,549 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:26:41,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-21 12:26:41,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:26:41,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:26:41,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:26:41,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:26:41,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:26:41,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:26:41,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:26:41,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:26:41,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:26:41,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:26:41,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:26:41,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:26:41,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:26:41,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:26:41,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:26:41,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:26:41,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-21 12:26:41,554 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-21 12:26:41,554 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:26:41,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:26:41,555 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:26:41,555 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:26:41,555 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a69393ce5fe75f7ab01b3582ad0675909e9396d47152d54bb12cb1909ec8c6ec [2021-12-21 12:26:41,709 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:26:41,726 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:26:41,728 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:26:41,728 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:26:41,729 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:26:41,730 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire1.c [2021-12-21 12:26:41,773 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b474c77/9340fa2ec9b54825a016cf85276df773/FLAG59d4c7fae [2021-12-21 12:26:42,138 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:26:42,138 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c [2021-12-21 12:26:42,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b474c77/9340fa2ec9b54825a016cf85276df773/FLAG59d4c7fae [2021-12-21 12:26:42,591 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e2b474c77/9340fa2ec9b54825a016cf85276df773 [2021-12-21 12:26:42,593 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:26:42,593 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:26:42,605 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:26:42,606 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:26:42,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:26:42,608 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,609 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10f16197 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42, skipping insertion in model container [2021-12-21 12:26:42,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,613 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:26:42,622 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:26:42,768 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/freire1.c[712,725] [2021-12-21 12:26:42,784 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:26:42,789 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:26:42,802 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/freire1.c[712,725] [2021-12-21 12:26:42,807 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:26:42,816 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:26:42,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42 WrapperNode [2021-12-21 12:26:42,817 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:26:42,819 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:26:42,819 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:26:42,819 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:26:42,824 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,830 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,841 INFO L137 Inliner]: procedures = 14, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 29 [2021-12-21 12:26:42,841 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:26:42,842 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:26:42,842 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:26:42,842 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:26:42,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,848 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,849 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,855 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,859 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,860 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,864 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:26:42,865 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:26:42,865 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:26:42,865 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:26:42,866 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (1/1) ... [2021-12-21 12:26:42,870 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:26:42,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:26:42,887 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:26:42,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:26:42,921 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:26:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-21 12:26:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:26:42,922 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:26:42,922 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:26:42,922 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:26:42,961 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:26:42,963 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:26:43,059 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:26:43,062 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:26:43,063 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:26:43,064 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:43 BoogieIcfgContainer [2021-12-21 12:26:43,064 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:26:43,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:26:43,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:26:43,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:26:43,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:26:42" (1/3) ... [2021-12-21 12:26:43,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78476b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:26:43, skipping insertion in model container [2021-12-21 12:26:43,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:42" (2/3) ... [2021-12-21 12:26:43,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78476b97 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:26:43, skipping insertion in model container [2021-12-21 12:26:43,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:43" (3/3) ... [2021-12-21 12:26:43,070 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2021-12-21 12:26:43,075 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:26:43,075 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:26:43,113 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:26:43,119 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:26:43,119 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:26:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 12:26:43,134 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:43,135 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:43,135 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:43,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1818803301, now seen corresponding path program 1 times [2021-12-21 12:26:43,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:26:43,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45621922] [2021-12-21 12:26:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:43,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:26:43,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:26:43,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-21 12:26:43,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45621922] [2021-12-21 12:26:43,238 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45621922] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:43,238 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:26:43,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:26:43,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998788721] [2021-12-21 12:26:43,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:43,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:26:43,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-21 12:26:43,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:26:43,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:26:43,272 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:26:43,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:43,284 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-12-21 12:26:43,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:26:43,285 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2021-12-21 12:26:43,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:43,290 INFO L225 Difference]: With dead ends: 30 [2021-12-21 12:26:43,290 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 12:26:43,292 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 [2021-12-21 12:26:43,295 INFO L933 BasicCegarLoop]: 17 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, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:26:43,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:26:43,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 12:26:43,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-21 12:26:43,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:26:43,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-21 12:26:43,317 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2021-12-21 12:26:43,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:43,318 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-21 12:26:43,318 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:26:43,318 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-21 12:26:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 12:26:43,319 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:43,319 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:43,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-21 12:26:43,320 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:43,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:43,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1811355551, now seen corresponding path program 1 times [2021-12-21 12:26:43,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-21 12:26:43,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115575511] [2021-12-21 12:26:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:43,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-21 12:26:43,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:26:43,350 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-21 12:26:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-21 12:26:43,373 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-21 12:26:43,373 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-21 12:26:43,375 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-21 12:26:43,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-21 12:26:43,379 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1] [2021-12-21 12:26:43,381 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-21 12:26:43,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.12 12:26:43 BoogieIcfgContainer [2021-12-21 12:26:43,397 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-21 12:26:43,397 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-21 12:26:43,397 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-21 12:26:43,398 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-21 12:26:43,398 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:43" (3/4) ... [2021-12-21 12:26:43,401 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-21 12:26:43,401 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-21 12:26:43,402 INFO L158 Benchmark]: Toolchain (without parser) took 807.89ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 62.5MB in the beginning and 78.7MB in the end (delta: -16.2MB). Peak memory consumption was 1.0MB. Max. memory is 16.1GB. [2021-12-21 12:26:43,402 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 92.3MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:26:43,405 INFO L158 Benchmark]: CACSL2BoogieTranslator took 212.11ms. Allocated memory is still 92.3MB. Free memory was 62.3MB in the beginning and 68.8MB in the end (delta: -6.5MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. [2021-12-21 12:26:43,405 INFO L158 Benchmark]: Boogie Procedure Inliner took 22.46ms. Allocated memory is still 92.3MB. Free memory was 68.8MB in the beginning and 67.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-21 12:26:43,407 INFO L158 Benchmark]: Boogie Preprocessor took 22.02ms. Allocated memory is still 92.3MB. Free memory was 67.2MB in the beginning and 66.3MB in the end (delta: 849.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:26:43,407 INFO L158 Benchmark]: RCFGBuilder took 199.94ms. Allocated memory is still 92.3MB. Free memory was 66.3MB in the beginning and 57.7MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-12-21 12:26:43,408 INFO L158 Benchmark]: TraceAbstraction took 331.38ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 57.4MB in the beginning and 79.1MB in the end (delta: -21.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:26:43,408 INFO L158 Benchmark]: Witness Printer took 3.66ms. Allocated memory is still 111.1MB. Free memory was 79.1MB in the beginning and 78.7MB in the end (delta: 461.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-21 12:26:43,412 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 92.3MB. Free memory was 50.8MB in the beginning and 50.7MB in the end (delta: 43.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 212.11ms. Allocated memory is still 92.3MB. Free memory was 62.3MB in the beginning and 68.8MB in the end (delta: -6.5MB). Peak memory consumption was 9.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 22.46ms. Allocated memory is still 92.3MB. Free memory was 68.8MB in the beginning and 67.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 22.02ms. Allocated memory is still 92.3MB. Free memory was 67.2MB in the beginning and 66.3MB in the end (delta: 849.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 199.94ms. Allocated memory is still 92.3MB. Free memory was 66.3MB in the beginning and 57.7MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 331.38ms. Allocated memory was 92.3MB in the beginning and 111.1MB in the end (delta: 18.9MB). Free memory was 57.4MB in the beginning and 79.1MB in the end (delta: -21.7MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.66ms. Allocated memory is still 111.1MB. Free memory was 79.1MB in the beginning and 78.7MB in the end (delta: 461.0kB). 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 32, overapproximation of someBinaryArithmeticDOUBLEoperation at line 28. Possible FailurePath: [L25] int r; [L26] double a, x; [L27] a = __VERIFIER_nondet_double() [L28] x = a / 2.0 [L29] r = 0 VAL [r=0] [L31] COND TRUE 1 VAL [r=0] [L32] CALL __VERIFIER_assert((int)(r*r - a - r + 2*x) == 0) 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, 16 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 0.3s, 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, 17 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, 17 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=16occurred 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, 14 NumberOfCodeBlocks, 14 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 6 ConstructedInterpolants, 0 QuantifiedInterpolants, 6 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 [2021-12-21 12:26:43,446 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/freire1.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 a69393ce5fe75f7ab01b3582ad0675909e9396d47152d54bb12cb1909ec8c6ec --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ff03de6 [2021-12-21 12:26:45,273 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-21 12:26:45,274 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-21 12:26:45,361 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-21 12:26:45,361 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-21 12:26:45,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-21 12:26:45,365 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-21 12:26:45,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-21 12:26:45,371 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-21 12:26:45,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-21 12:26:45,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-21 12:26:45,381 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-21 12:26:45,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-21 12:26:45,383 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-21 12:26:45,384 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-21 12:26:45,385 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-21 12:26:45,388 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-21 12:26:45,388 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-21 12:26:45,389 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-21 12:26:45,391 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-21 12:26:45,394 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-21 12:26:45,395 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-21 12:26:45,396 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-21 12:26:45,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-21 12:26:45,399 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-21 12:26:45,399 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-21 12:26:45,400 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-21 12:26:45,400 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-21 12:26:45,401 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-21 12:26:45,402 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-21 12:26:45,402 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-21 12:26:45,402 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-21 12:26:45,403 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-21 12:26:45,404 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-21 12:26:45,405 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-21 12:26:45,405 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-21 12:26:45,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-21 12:26:45,406 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-21 12:26:45,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-21 12:26:45,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-21 12:26:45,407 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-21 12:26:45,410 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-21 12:26:45,433 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-21 12:26:45,433 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-21 12:26:45,434 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-21 12:26:45,434 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-21 12:26:45,435 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-21 12:26:45,435 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-21 12:26:45,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-21 12:26:45,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-21 12:26:45,436 INFO L138 SettingsManager]: * Use SBE=true [2021-12-21 12:26:45,436 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-21 12:26:45,437 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-21 12:26:45,437 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-21 12:26:45,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-21 12:26:45,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-21 12:26:45,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-21 12:26:45,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-21 12:26:45,438 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-21 12:26:45,438 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-21 12:26:45,438 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-21 12:26:45,438 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-21 12:26:45,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-21 12:26:45,439 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-21 12:26:45,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-21 12:26:45,439 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-21 12:26:45,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-21 12:26:45,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-21 12:26:45,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:26:45,440 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-21 12:26:45,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-21 12:26:45,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-21 12:26:45,440 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-21 12:26:45,440 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-21 12:26:45,440 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-21 12:26:45,441 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-21 12:26:45,441 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-21 12:26:45,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-21 12:26:45,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-21 12:26:45,441 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a69393ce5fe75f7ab01b3582ad0675909e9396d47152d54bb12cb1909ec8c6ec [2021-12-21 12:26:45,798 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-21 12:26:45,821 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-21 12:26:45,822 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-21 12:26:45,823 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-21 12:26:45,823 INFO L275 PluginConnector]: CDTParser initialized [2021-12-21 12:26:45,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench/freire1.c [2021-12-21 12:26:45,872 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2567779bb/8b38de9528a94611ac130de1b1fd0a84/FLAGffaabe69a [2021-12-21 12:26:46,229 INFO L306 CDTParser]: Found 1 translation units. [2021-12-21 12:26:46,230 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench/freire1.c [2021-12-21 12:26:46,234 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2567779bb/8b38de9528a94611ac130de1b1fd0a84/FLAGffaabe69a [2021-12-21 12:26:46,665 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2567779bb/8b38de9528a94611ac130de1b1fd0a84 [2021-12-21 12:26:46,667 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-21 12:26:46,668 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-21 12:26:46,669 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-21 12:26:46,669 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-21 12:26:46,671 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-21 12:26:46,672 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,673 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7628915a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46, skipping insertion in model container [2021-12-21 12:26:46,673 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,677 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-21 12:26:46,686 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-21 12:26:46,766 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/freire1.c[712,725] [2021-12-21 12:26:46,780 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:26:46,789 INFO L203 MainTranslator]: Completed pre-run [2021-12-21 12:26:46,798 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/freire1.c[712,725] [2021-12-21 12:26:46,801 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-21 12:26:46,817 INFO L208 MainTranslator]: Completed translation [2021-12-21 12:26:46,818 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46 WrapperNode [2021-12-21 12:26:46,818 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-21 12:26:46,820 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-21 12:26:46,820 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-21 12:26:46,821 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-21 12:26:46,838 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,846 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,857 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 30 [2021-12-21 12:26:46,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-21 12:26:46,858 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-21 12:26:46,859 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-21 12:26:46,859 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-21 12:26:46,864 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,865 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,876 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,888 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,896 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-21 12:26:46,900 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-21 12:26:46,901 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-21 12:26:46,901 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-21 12:26:46,902 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (1/1) ... [2021-12-21 12:26:46,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-21 12:26:46,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-21 12:26:46,929 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-21 12:26:46,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-21 12:26:46,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-21 12:26:46,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-21 12:26:46,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-21 12:26:46,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-21 12:26:46,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-21 12:26:46,961 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-21 12:26:47,018 INFO L234 CfgBuilder]: Building ICFG [2021-12-21 12:26:47,019 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-21 12:26:48,629 INFO L275 CfgBuilder]: Performing block encoding [2021-12-21 12:26:48,641 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-21 12:26:48,641 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-12-21 12:26:48,642 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:48 BoogieIcfgContainer [2021-12-21 12:26:48,642 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-21 12:26:48,643 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-21 12:26:48,644 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-21 12:26:48,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-21 12:26:48,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 12:26:46" (1/3) ... [2021-12-21 12:26:48,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecdc55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:26:48, skipping insertion in model container [2021-12-21 12:26:48,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 12:26:46" (2/3) ... [2021-12-21 12:26:48,659 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4ecdc55d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 12:26:48, skipping insertion in model container [2021-12-21 12:26:48,659 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 12:26:48" (3/3) ... [2021-12-21 12:26:48,660 INFO L111 eAbstractionObserver]: Analyzing ICFG freire1.c [2021-12-21 12:26:48,663 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-21 12:26:48,671 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-21 12:26:48,703 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-21 12:26:48,707 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-21 12:26:48,707 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-21 12:26:48,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:26:48,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 12:26:48,743 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:48,744 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:48,744 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:48,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:48,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1818803301, now seen corresponding path program 1 times [2021-12-21 12:26:48,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:26:48,756 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2066907880] [2021-12-21 12:26:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:48,772 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:26:48,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:26:48,774 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) [2021-12-21 12:26:48,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-21 12:26:49,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:49,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-21 12:26:49,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:26:49,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:26:49,139 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:26:49,140 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:26:49,140 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2066907880] [2021-12-21 12:26:49,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2066907880] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:26:49,141 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:26:49,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-21 12:26:49,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953209156] [2021-12-21 12:26:49,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:26:49,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-21 12:26:49,147 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:26:49,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-21 12:26:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:26:49,168 INFO L87 Difference]: Start difference. First operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:26:49,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:26:49,182 INFO L93 Difference]: Finished difference Result 30 states and 40 transitions. [2021-12-21 12:26:49,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-21 12:26:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 7 [2021-12-21 12:26:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:26:49,188 INFO L225 Difference]: With dead ends: 30 [2021-12-21 12:26:49,188 INFO L226 Difference]: Without dead ends: 12 [2021-12-21 12:26:49,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-21 12:26:49,192 INFO L933 BasicCegarLoop]: 17 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, 17 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-21 12:26:49,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-21 12:26:49,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-12-21 12:26:49,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-12-21 12:26:49,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 8 states have (on average 1.25) internal successors, (10), 9 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-21 12:26:49,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-12-21 12:26:49,213 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 7 [2021-12-21 12:26:49,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:26:49,214 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-12-21 12:26:49,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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) [2021-12-21 12:26:49,214 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-12-21 12:26:49,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-21 12:26:49,215 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:26:49,215 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:26:49,251 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-21 12:26:49,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:26:49,429 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:26:49,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:26:49,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1811355551, now seen corresponding path program 1 times [2021-12-21 12:26:49,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:26:49,430 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002589078] [2021-12-21 12:26:49,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:26:49,430 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:26:49,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:26:49,432 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) [2021-12-21 12:26:49,433 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-21 12:26:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:26:51,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 12:26:51,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:27:07,961 WARN L838 $PredicateComparison]: unable to prove that (or (= |c___VERIFIER_assert_#in~cond| (_ bv1 32)) (and (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1|) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) (= |c___VERIFIER_assert_#in~cond| (_ bv0 32)))) is different from false [2021-12-21 12:27:16,178 WARN L838 $PredicateComparison]: unable to prove that (or (= (_ bv1 32) c___VERIFIER_assert_~cond) (and (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1|) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) (= (_ bv0 32) c___VERIFIER_assert_~cond))) is different from false [2021-12-21 12:27:24,378 WARN L838 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1|) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from false [2021-12-21 12:27:26,414 WARN L860 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1|) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) is different from true [2021-12-21 12:27:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-21 12:27:26,415 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-21 12:27:26,415 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-21 12:27:26,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002589078] [2021-12-21 12:27:26,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2002589078] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-21 12:27:26,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-21 12:27:26,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-21 12:27:26,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794012499] [2021-12-21 12:27:26,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-21 12:27:26,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-21 12:27:26,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-21 12:27:26,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-21 12:27:26,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=8, Unknown=4, NotChecked=18, Total=42 [2021-12-21 12:27:26,417 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 7 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-12-21 12:27:27,524 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 12:27:29,768 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.24s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 12:27:31,902 WARN L838 $PredicateComparison]: unable to prove that (and (or (= |c___VERIFIER_assert_#in~cond| (_ bv1 32)) (and (exists ((|v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| (_ FloatingPoint 11 53))) (not (= ((_ fp.to_sbv 32) roundTowardZero (fp.add roundNearestTiesToEven (let ((.cse0 ((_ to_fp 11 53) roundNearestTiesToEven (_ bv0 32)))) (fp.sub roundNearestTiesToEven (fp.sub roundNearestTiesToEven .cse0 |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1|) .cse0)) (fp.mul roundNearestTiesToEven ((_ to_fp 11 53) roundNearestTiesToEven (_ bv2 32)) (fp.div roundNearestTiesToEven |v_ULTIMATE.start_main_~a~0#1_BEFORE_CALL_1| ((_ to_fp 11 53) roundNearestTiesToEven 2.0))))) (_ bv0 32)))) (= |c___VERIFIER_assert_#in~cond| (_ bv0 32)))) (= c_currentRoundingMode roundNearestTiesToEven)) is different from false [2021-12-21 12:27:33,720 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 12:27:36,967 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.23s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 12:27:39,175 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.20s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 12:27:41,387 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.21s for a HTC check with result UNKNOWN. Formula has sorts [Bool, RoundingMode, FloatingPoint, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 12:27:43,475 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 12:27:45,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.19s for a HTC check with result UNKNOWN. Formula has sorts [Bool, FloatingPoint, RoundingMode, Real, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-12-21 12:27:45,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-21 12:27:45,663 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2021-12-21 12:27:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-21 12:27:45,721 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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 7 [2021-12-21 12:27:45,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-21 12:27:45,721 INFO L225 Difference]: With dead ends: 22 [2021-12-21 12:27:45,721 INFO L226 Difference]: Without dead ends: 20 [2021-12-21 12:27:45,721 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=14, Invalid=9, Unknown=5, NotChecked=28, Total=56 [2021-12-21 12:27:45,722 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 3 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 49 IncrementalHoareTripleChecker+Unchecked, 17.1s IncrementalHoareTripleChecker+Time [2021-12-21 12:27:45,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 30 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5 Invalid, 6 Unknown, 49 Unchecked, 17.1s Time] [2021-12-21 12:27:45,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-12-21 12:27:45,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 18. [2021-12-21 12:27:45,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 14 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-21 12:27:45,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-12-21 12:27:45,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 7 [2021-12-21 12:27:45,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-21 12:27:45,726 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-12-21 12:27:45,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.0) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-12-21 12:27:45,727 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-12-21 12:27:45,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-21 12:27:45,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-21 12:27:45,727 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-21 12:27:45,743 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-21 12:27:45,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-21 12:27:45,940 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-21 12:27:45,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-21 12:27:45,940 INFO L85 PathProgramCache]: Analyzing trace with hash 850089181, now seen corresponding path program 1 times [2021-12-21 12:27:45,941 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-21 12:27:45,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [593654698] [2021-12-21 12:27:45,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-21 12:27:45,941 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-21 12:27:45,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-21 12:27:45,942 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) [2021-12-21 12:27:45,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-21 12:27:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-21 12:27:46,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-21 12:27:46,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-21 12:27:52,507 WARN L838 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) |c_ULTIMATE.start_main_~a~0#1|) ((_ to_fp 11 53) c_currentRoundingMode |c_ULTIMATE.start_main_~r~0#1|)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) |c_ULTIMATE.start_main_~x~0#1|))) (_ bv0 32)) is different from false [2021-12-21 12:27:54,567 WARN L860 $PredicateComparison]: unable to prove that (= ((_ fp.to_sbv 32) roundTowardZero (fp.add c_currentRoundingMode (fp.sub c_currentRoundingMode (fp.sub c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (bvmul |c_ULTIMATE.start_main_~r~0#1| |c_ULTIMATE.start_main_~r~0#1|)) |c_ULTIMATE.start_main_~a~0#1|) ((_ to_fp 11 53) c_currentRoundingMode |c_ULTIMATE.start_main_~r~0#1|)) (fp.mul c_currentRoundingMode ((_ to_fp 11 53) c_currentRoundingMode (_ bv2 32)) |c_ULTIMATE.start_main_~x~0#1|))) (_ bv0 32)) is different from true