/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-b7b32d2 [2021-02-21 21:17:32,674 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-21 21:17:32,677 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-21 21:17:32,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-21 21:17:32,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-02-21 21:17:32,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-02-21 21:17:32,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-02-21 21:17:32,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-02-21 21:17:32,768 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-02-21 21:17:32,770 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-02-21 21:17:32,779 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-02-21 21:17:32,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-02-21 21:17:32,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-02-21 21:17:32,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-02-21 21:17:32,793 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-02-21 21:17:32,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-02-21 21:17:32,807 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-02-21 21:17:32,821 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-02-21 21:17:32,822 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-02-21 21:17:32,823 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-02-21 21:17:32,824 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2021-02-21 21:17:32,849 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-21 21:17:32,849 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-21 21:17:32,854 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-21 21:17:32,854 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-21 21:17:32,855 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-21 21:17:32,855 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-21 21:17:32,855 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-21 21:17:32,855 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-21 21:17:32,855 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-21 21:17:32,856 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-21 21:17:32,857 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-21 21:17:32,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-21 21:17:32,858 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-21 21:17:32,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-21 21:17:32,859 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-21 21:17:32,859 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2021-02-21 21:17:32,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-21 21:17:32,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-21 21:17:32,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-21 21:17:32,860 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-21 21:17:32,860 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-02-21 21:17:32,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-21 21:17:32,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-21 21:17:33,294 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-21 21:17:33,324 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-21 21:17:33,327 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-21 21:17:33,329 INFO L271 PluginConnector]: Initializing CDTParser... [2021-02-21 21:17:33,329 INFO L275 PluginConnector]: CDTParser initialized [2021-02-21 21:17:33,330 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2021-02-21 21:17:33,432 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f0071e6e/5b466b5f84ff4d57bb47e5325e92fc17/FLAG4984d6260 [2021-02-21 21:17:34,061 INFO L306 CDTParser]: Found 1 translation units. [2021-02-21 21:17:34,062 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2021-02-21 21:17:34,071 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f0071e6e/5b466b5f84ff4d57bb47e5325e92fc17/FLAG4984d6260 [2021-02-21 21:17:34,433 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f0071e6e/5b466b5f84ff4d57bb47e5325e92fc17 [2021-02-21 21:17:34,443 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-21 21:17:34,459 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-21 21:17:34,464 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:34,465 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-02-21 21:17:34,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-02-21 21:17:34,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,472 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67061c52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34, skipping insertion in model container [2021-02-21 21:17:34,473 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,483 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-02-21 21:17:34,505 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-02-21 21:17:34,662 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c[356,369] [2021-02-21 21:17:34,681 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:34,692 INFO L203 MainTranslator]: Completed pre-run [2021-02-21 21:17:34,707 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c[356,369] [2021-02-21 21:17:34,714 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-02-21 21:17:34,731 INFO L208 MainTranslator]: Completed translation [2021-02-21 21:17:34,732 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34 WrapperNode [2021-02-21 21:17:34,732 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-02-21 21:17:34,733 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-21 21:17:34,733 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-21 21:17:34,733 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-21 21:17:34,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,756 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (1/1) ... [2021-02-21 21:17:34,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-21 21:17:34,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-21 21:17:34,772 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-21 21:17:34,772 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-21 21:17:34,773 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (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 [2021-02-21 21:17:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-02-21 21:17:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-21 21:17:34,883 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-02-21 21:17:34,884 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-02-21 21:17:34,884 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-02-21 21:17:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-02-21 21:17:34,884 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-02-21 21:17:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-02-21 21:17:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-02-21 21:17:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2021-02-21 21:17:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-02-21 21:17:34,885 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2021-02-21 21:17:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-02-21 21:17:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-02-21 21:17:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-02-21 21:17:34,886 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-21 21:17:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-02-21 21:17:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-02-21 21:17:34,887 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-02-21 21:17:35,393 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-21 21:17:35,394 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-02-21 21:17:35,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:35 BoogieIcfgContainer [2021-02-21 21:17:35,396 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-21 21:17:35,399 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-21 21:17:35,400 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-21 21:17:35,403 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-21 21:17:35,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.02 09:17:34" (1/3) ... [2021-02-21 21:17:35,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d31df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:35, skipping insertion in model container [2021-02-21 21:17:35,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.02 09:17:34" (2/3) ... [2021-02-21 21:17:35,405 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18d31df9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.02 09:17:35, skipping insertion in model container [2021-02-21 21:17:35,406 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.02 09:17:35" (3/3) ... [2021-02-21 21:17:35,408 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2021-02-21 21:17:35,415 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-02-21 21:17:35,421 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-21 21:17:35,441 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-02-21 21:17:35,469 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-21 21:17:35,469 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-21 21:17:35,469 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-02-21 21:17:35,469 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-21 21:17:35,470 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-21 21:17:35,470 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-21 21:17:35,470 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-21 21:17:35,470 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-21 21:17:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states. [2021-02-21 21:17:35,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:17:35,499 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:35,500 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:35,501 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:35,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:35,508 INFO L82 PathProgramCache]: Analyzing trace with hash 2129882840, now seen corresponding path program 1 times [2021-02-21 21:17:35,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:35,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155550478] [2021-02-21 21:17:35,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:35,606 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:35,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:35,730 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:35,732 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:35,733 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:35,735 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:35,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:35,852 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:35,853 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:35,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:17:35,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155550478] [2021-02-21 21:17:35,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:35,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-21 21:17:35,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838891490] [2021-02-21 21:17:35,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-21 21:17:35,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:35,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-21 21:17:35,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:17:35,890 INFO L87 Difference]: Start difference. First operand 51 states. Second operand 3 states. [2021-02-21 21:17:36,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:36,046 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2021-02-21 21:17:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-21 21:17:36,050 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2021-02-21 21:17:36,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:36,059 INFO L225 Difference]: With dead ends: 69 [2021-02-21 21:17:36,060 INFO L226 Difference]: Without dead ends: 37 [2021-02-21 21:17:36,063 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-21 21:17:36,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-02-21 21:17:36,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-02-21 21:17:36,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2021-02-21 21:17:36,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-02-21 21:17:36,157 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 31 [2021-02-21 21:17:36,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:36,157 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-02-21 21:17:36,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has 3 states. [2021-02-21 21:17:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-02-21 21:17:36,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:17:36,159 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:36,159 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:36,160 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-21 21:17:36,162 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1900849632, now seen corresponding path program 1 times [2021-02-21 21:17:36,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:36,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619353259] [2021-02-21 21:17:36,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:36,178 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:36,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:36,311 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,312 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:36,314 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,315 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-02-21 21:17:36,331 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,332 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:36,350 WARN L141 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size [2021-02-21 21:17:36,351 WARN L147 QuantifierPusher]: treesize reduction 12, result has 7.7 percent of original size 1 [2021-02-21 21:17:36,352 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,353 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:36,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:36,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:36,427 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,428 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:36,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:17:36,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619353259] [2021-02-21 21:17:36,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:36,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:17:36,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239126764] [2021-02-21 21:17:36,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:17:36,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:36,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:17:36,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:17:36,441 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 5 states. [2021-02-21 21:17:36,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:36,742 INFO L93 Difference]: Finished difference Result 57 states and 59 transitions. [2021-02-21 21:17:36,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:17:36,743 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2021-02-21 21:17:36,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:36,746 INFO L225 Difference]: With dead ends: 57 [2021-02-21 21:17:36,746 INFO L226 Difference]: Without dead ends: 51 [2021-02-21 21:17:36,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:17:36,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-02-21 21:17:36,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 42. [2021-02-21 21:17:36,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-02-21 21:17:36,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-02-21 21:17:36,768 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 31 [2021-02-21 21:17:36,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:36,769 INFO L480 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-02-21 21:17:36,769 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:17:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-02-21 21:17:36,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-21 21:17:36,772 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:36,772 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:36,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-21 21:17:36,772 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:36,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:36,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1192211008, now seen corresponding path program 1 times [2021-02-21 21:17:36,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:36,775 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [407987857] [2021-02-21 21:17:36,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:36,781 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:36,913 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,917 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:36,921 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:36,923 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-02-21 21:17:36,942 WARN L141 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size [2021-02-21 21:17:36,946 WARN L147 QuantifierPusher]: treesize reduction 2, result has 96.0 percent of original size 48 [2021-02-21 21:17:37,009 WARN L141 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size [2021-02-21 21:17:37,011 WARN L147 QuantifierPusher]: treesize reduction 5, result has 88.4 percent of original size 38 [2021-02-21 21:17:37,014 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:37,015 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:37,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-02-21 21:17:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-21 21:17:37,076 WARN L141 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-02-21 21:17:37,077 WARN L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-02-21 21:17:37,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-21 21:17:37,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [407987857] [2021-02-21 21:17:37,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-21 21:17:37,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-02-21 21:17:37,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429942940] [2021-02-21 21:17:37,082 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-21 21:17:37,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-02-21 21:17:37,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-21 21:17:37,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-02-21 21:17:37,084 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 5 states. [2021-02-21 21:17:37,353 WARN L202 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2021-02-21 21:17:37,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-21 21:17:37,494 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-02-21 21:17:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-21 21:17:37,495 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2021-02-21 21:17:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-21 21:17:37,497 INFO L225 Difference]: With dead ends: 58 [2021-02-21 21:17:37,497 INFO L226 Difference]: Without dead ends: 52 [2021-02-21 21:17:37,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-02-21 21:17:37,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-02-21 21:17:37,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 38. [2021-02-21 21:17:37,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-02-21 21:17:37,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-02-21 21:17:37,511 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2021-02-21 21:17:37,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-21 21:17:37,512 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-02-21 21:17:37,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-02-21 21:17:37,512 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-02-21 21:17:37,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-21 21:17:37,514 INFO L414 BasicCegarLoop]: Found error trace [2021-02-21 21:17:37,514 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-21 21:17:37,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-02-21 21:17:37,514 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-02-21 21:17:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-21 21:17:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2094669374, now seen corresponding path program 1 times [2021-02-21 21:17:37,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-02-21 21:17:37,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1362219282] [2021-02-21 21:17:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-21 21:17:38,304 WARN L202 SmtUtils]: Spent 768.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2021-02-21 21:17:38,320 INFO L84 AcceleratorFastUPR]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2021-02-21 21:17:38,323 INFO L218 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-02-21 21:17:38,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:17:38,387 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:17:38,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-02-21 21:17:38,433 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-02-21 21:17:38,485 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2021-02-21 21:17:38,486 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2021-02-21 21:17:38,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-02-21 21:17:38,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.02 09:17:38 BoogieIcfgContainer [2021-02-21 21:17:38,508 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-21 21:17:38,511 INFO L168 Benchmark]: Toolchain (without parser) took 4064.20 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 139.2 MB in the beginning and 85.6 MB in the end (delta: 53.6 MB). Peak memory consumption was 87.7 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:38,512 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 163.6 MB. Free memory is still 148.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-02-21 21:17:38,514 INFO L168 Benchmark]: CACSL2BoogieTranslator took 267.87 ms. Allocated memory is still 163.6 MB. Free memory was 138.1 MB in the beginning and 128.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:38,521 INFO L168 Benchmark]: Boogie Preprocessor took 38.22 ms. Allocated memory is still 163.6 MB. Free memory was 128.5 MB in the beginning and 127.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:38,522 INFO L168 Benchmark]: RCFGBuilder took 624.06 ms. Allocated memory is still 163.6 MB. Free memory was 126.9 MB in the beginning and 139.4 MB in the end (delta: -12.4 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:38,523 INFO L168 Benchmark]: TraceAbstraction took 3109.22 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 139.0 MB in the beginning and 85.6 MB in the end (delta: 53.4 MB). Peak memory consumption was 87.3 MB. Max. memory is 8.0 GB. [2021-02-21 21:17:38,533 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 163.6 MB. Free memory is still 148.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 267.87 ms. Allocated memory is still 163.6 MB. Free memory was 138.1 MB in the beginning and 128.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.22 ms. Allocated memory is still 163.6 MB. Free memory was 128.5 MB in the beginning and 127.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 624.06 ms. Allocated memory is still 163.6 MB. Free memory was 126.9 MB in the beginning and 139.4 MB in the end (delta: -12.4 MB). Peak memory consumption was 12.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 3109.22 ms. Allocated memory was 163.6 MB in the beginning and 197.1 MB in the end (delta: 33.6 MB). Free memory was 139.0 MB in the beginning and 85.6 MB in the end (delta: 53.4 MB). Peak memory consumption was 87.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 8]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L12] int b; [L15] _Bool k=__VERIFIER_nondet_bool(); [L16] unsigned int i,n,j; [L17] int a[1025]; [L19] COND TRUE \read(k) [L20] n=0 [L25] i=0 [L26] j=__VERIFIER_nondet_uint() [L27] COND FALSE !(j > 10000) [L30] COND TRUE i <= n [L31] i++ [L32] j= j +2 [L30] COND FALSE !(i <= n) [L35] a[i]=0 [L36] CALL __VERIFIER_assert(j<1025) [L7] COND TRUE !(cond) [L8] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.0s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 132 SDtfs, 125 SDslu, 55 SDs, 0 SdLazy, 122 SolverSat, 6 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 23 StatesRemovedByMinimization, 2 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 proved your program to be incorrect! Received shutdown request...