/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/nla-digbench/sqrt1-ll.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-03 00:39:52,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 00:39:52,950 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 00:39:52,987 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-03 00:39:52,987 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-03 00:39:52,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-03 00:39:52,995 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-03 00:39:53,001 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-03 00:39:53,002 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-03 00:39:53,008 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-03 00:39:53,031 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-03 00:39:53,032 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-03 00:39:53,033 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-03 00:39:53,033 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-03 00:39:53,034 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-03 00:39:53,035 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-03 00:39:53,035 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-03 00:39:53,036 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-03 00:39:53,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-03 00:39:53,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-03 00:39:53,039 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-03 00:39:53,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-03 00:39:53,040 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-03 00:39:53,041 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-03 00:39:53,042 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-03 00:39:53,042 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-03 00:39:53,043 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-03 00:39:53,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-03 00:39:53,043 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-03 00:39:53,044 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-03 00:39:53,044 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-03 00:39:53,045 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-03 00:39:53,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-03 00:39:53,046 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-03 00:39:53,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-03 00:39:53,047 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-03 00:39:53,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-03 00:39:53,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-03 00:39:53,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-03 00:39:53,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-03 00:39:53,049 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-03 00:39:53,050 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-03 00:39:53,058 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 00:39:53,059 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 00:39:53,060 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 00:39:53,060 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 00:39:53,060 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 00:39:53,060 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 00:39:53,060 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 00:39:53,060 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 00:39:53,061 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 00:39:53,061 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 00:39:53,061 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 00:39:53,061 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 00:39:53,061 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 00:39:53,061 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 00:39:53,061 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 00:39:53,061 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 00:39:53,062 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 00:39:53,062 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 00:39:53,062 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:39:53,062 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 00:39:53,062 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-03 00:39:53,062 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 00:39:53,062 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-03 00:39:53,062 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-03 00:39:53,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 00:39:53,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 00:39:53,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 00:39:53,299 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-03 00:39:53,299 INFO L275 PluginConnector]: CDTParser initialized [2021-05-03 00:39:53,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/nla-digbench/sqrt1-ll.c [2021-05-03 00:39:53,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016ccebd3/aedba4735cad45bb913d84358e9ca141/FLAGf23408940 [2021-05-03 00:39:53,692 INFO L306 CDTParser]: Found 1 translation units. [2021-05-03 00:39:53,693 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c [2021-05-03 00:39:53,698 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016ccebd3/aedba4735cad45bb913d84358e9ca141/FLAGf23408940 [2021-05-03 00:39:54,106 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/016ccebd3/aedba4735cad45bb913d84358e9ca141 [2021-05-03 00:39:54,108 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 00:39:54,110 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 00:39:54,125 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-03 00:39:54,125 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-03 00:39:54,128 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-03 00:39:54,129 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,130 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3fd240ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54, skipping insertion in model container [2021-05-03 00:39:54,130 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,135 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-03 00:39:54,151 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-03 00:39:54,261 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c[520,533] [2021-05-03 00:39:54,271 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:39:54,290 INFO L203 MainTranslator]: Completed pre-run [2021-05-03 00:39:54,304 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/nla-digbench/sqrt1-ll.c[520,533] [2021-05-03 00:39:54,325 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-03 00:39:54,335 INFO L208 MainTranslator]: Completed translation [2021-05-03 00:39:54,336 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54 WrapperNode [2021-05-03 00:39:54,337 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-03 00:39:54,338 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 00:39:54,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 00:39:54,339 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 00:39:54,362 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,363 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,403 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,422 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,425 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (1/1) ... [2021-05-03 00:39:54,431 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 00:39:54,432 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 00:39:54,432 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 00:39:54,432 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 00:39:54,433 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 00:39:54,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-03 00:39:54,529 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 00:39:54,529 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-03 00:39:54,529 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2021-05-03 00:39:54,529 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-03 00:39:54,529 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-03 00:39:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-03 00:39:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-03 00:39:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-03 00:39:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-03 00:39:54,530 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2021-05-03 00:39:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2021-05-03 00:39:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-03 00:39:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-03 00:39:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-03 00:39:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-03 00:39:54,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 00:39:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-03 00:39:54,532 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-03 00:39:54,533 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-03 00:39:54,791 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 00:39:54,791 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-03 00:39:54,792 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:39:54 BoogieIcfgContainer [2021-05-03 00:39:54,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 00:39:54,794 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 00:39:54,794 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 00:39:54,796 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 00:39:54,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.05 12:39:54" (1/3) ... [2021-05-03 00:39:54,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc5dcfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:39:54, skipping insertion in model container [2021-05-03 00:39:54,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.05 12:39:54" (2/3) ... [2021-05-03 00:39:54,814 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6cc5dcfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 12:39:54, skipping insertion in model container [2021-05-03 00:39:54,814 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 12:39:54" (3/3) ... [2021-05-03 00:39:54,816 INFO L111 eAbstractionObserver]: Analyzing ICFG sqrt1-ll.c [2021-05-03 00:39:54,820 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-03 00:39:54,823 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 00:39:54,853 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-03 00:39:54,876 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 00:39:54,876 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 00:39:54,876 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-03 00:39:54,876 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 00:39:54,876 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 00:39:54,876 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 00:39:54,876 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 00:39:54,876 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 00:39:54,893 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-05-03 00:39:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:39:54,899 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:54,899 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:54,900 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:54,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:54,909 INFO L82 PathProgramCache]: Analyzing trace with hash 515438393, now seen corresponding path program 1 times [2021-05-03 00:39:54,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:54,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166219371] [2021-05-03 00:39:54,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:54,967 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:55,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:55,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:55,132 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:55,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166219371] [2021-05-03 00:39:55,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [166219371] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:55,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:55,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 00:39:55,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214739146] [2021-05-03 00:39:55,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 00:39:55,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:55,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 00:39:55,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:39:55,149 INFO L87 Difference]: Start difference. First operand has 25 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:55,287 INFO L93 Difference]: Finished difference Result 44 states and 66 transitions. [2021-05-03 00:39:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 00:39:55,289 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-03 00:39:55,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:55,298 INFO L225 Difference]: With dead ends: 44 [2021-05-03 00:39:55,298 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 00:39:55,301 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 00:39:55,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 00:39:55,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 00:39:55,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 10 states have internal predecessors, (11), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2021-05-03 00:39:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2021-05-03 00:39:55,328 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2021-05-03 00:39:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:55,328 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2021-05-03 00:39:55,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:55,328 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2021-05-03 00:39:55,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 00:39:55,329 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:55,329 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:55,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 00:39:55,330 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:55,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:55,331 INFO L82 PathProgramCache]: Analyzing trace with hash 517106689, now seen corresponding path program 1 times [2021-05-03 00:39:55,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:55,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959157079] [2021-05-03 00:39:55,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:55,342 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:55,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:55,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-03 00:39:55,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 00:39:55,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 00:39:55,438 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-03 00:39:55,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959157079] [2021-05-03 00:39:55,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [959157079] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-03 00:39:55,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 00:39:55,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-03 00:39:55,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235989981] [2021-05-03 00:39:55,439 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 00:39:55,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-03 00:39:55,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 00:39:55,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-05-03 00:39:55,440 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:55,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 00:39:55,746 INFO L93 Difference]: Finished difference Result 34 states and 44 transitions. [2021-05-03 00:39:55,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-03 00:39:55,747 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2021-05-03 00:39:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 00:39:55,749 INFO L225 Difference]: With dead ends: 34 [2021-05-03 00:39:55,749 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 00:39:55,751 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 165.6ms TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 00:39:55,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 00:39:55,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-05-03 00:39:55,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 16 states have internal predecessors, (17), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-05-03 00:39:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2021-05-03 00:39:55,778 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 11 [2021-05-03 00:39:55,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 00:39:55,778 INFO L480 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2021-05-03 00:39:55,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-03 00:39:55,779 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2021-05-03 00:39:55,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 00:39:55,780 INFO L515 BasicCegarLoop]: Found error trace [2021-05-03 00:39:55,780 INFO L523 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 00:39:55,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-03 00:39:55,781 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-03 00:39:55,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 00:39:55,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1248765655, now seen corresponding path program 1 times [2021-05-03 00:39:55,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-03 00:39:55,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840725121] [2021-05-03 00:39:55,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 00:39:55,787 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-03 00:39:55,804 WARN L167 FreeRefinementEngine]: Strategy FIXED_PREFERENCES was unsuccessful and could not determine trace feasibility [2021-05-03 00:39:55,804 INFO L624 BasicCegarLoop]: Counterexample might be feasible [2021-05-03 00:39:55,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 00:39:55,820 WARN L227 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2021-05-03 00:39:55,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 12:39:55 BoogieIcfgContainer [2021-05-03 00:39:55,821 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 00:39:55,826 INFO L168 Benchmark]: Toolchain (without parser) took 1715.94 ms. Allocated memory is still 234.9 MB. Free memory was 200.7 MB in the beginning and 191.9 MB in the end (delta: 8.9 MB). Peak memory consumption was 10.1 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:55,826 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 234.9 MB. Free memory is still 217.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-05-03 00:39:55,827 INFO L168 Benchmark]: CACSL2BoogieTranslator took 212.36 ms. Allocated memory is still 234.9 MB. Free memory was 200.6 MB in the beginning and 190.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:55,827 INFO L168 Benchmark]: Boogie Preprocessor took 92.42 ms. Allocated memory is still 234.9 MB. Free memory was 190.5 MB in the beginning and 218.4 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:55,829 INFO L168 Benchmark]: RCFGBuilder took 360.64 ms. Allocated memory is still 234.9 MB. Free memory was 218.4 MB in the beginning and 203.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:55,832 INFO L168 Benchmark]: TraceAbstraction took 1031.50 ms. Allocated memory is still 234.9 MB. Free memory was 203.2 MB in the beginning and 191.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. [2021-05-03 00:39:55,834 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 234.9 MB. Free memory is still 217.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 212.36 ms. Allocated memory is still 234.9 MB. Free memory was 200.6 MB in the beginning and 190.6 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 92.42 ms. Allocated memory is still 234.9 MB. Free memory was 190.5 MB in the beginning and 218.4 MB in the end (delta: -27.9 MB). Peak memory consumption was 3.4 MB. Max. memory is 8.0 GB. * RCFGBuilder took 360.64 ms. Allocated memory is still 234.9 MB. Free memory was 218.4 MB in the beginning and 203.7 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 8.0 GB. * TraceAbstraction took 1031.50 ms. Allocated memory is still 234.9 MB. Free memory was 203.2 MB in the beginning and 191.9 MB in the end (delta: 11.4 MB). Peak memory consumption was 12.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 14]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L21] int n; [L22] long long a, s, t; [L23] n = __VERIFIER_nondet_int() [L25] a = 0 [L26] s = 1 [L27] t = 1 [L29] COND TRUE 1 [L30] CALL __VERIFIER_assert(t == 2*a + 1) [L12] COND FALSE !(!(cond)) [L30] RET __VERIFIER_assert(t == 2*a + 1) [L31] CALL __VERIFIER_assert(s == (a + 1) * (a + 1)) [L12] COND TRUE !(cond) [L14] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 933.9ms, OverallIterations: 3, TraceHistogramMax: 2, EmptinessCheckTime: 13.0ms, AutomataDifference: 475.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 39 SDtfs, 32 SDslu, 29 SDs, 0 SdLazy, 82 SolverSat, 33 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 184.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 207.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=2, InterpolantAutomatonStates: 10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 43.0ms AutomataMinimizationTime, 2 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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 Received shutdown request...