/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 0.2.0-b8ad66e [2020-10-23 21:45:55,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-23 21:45:55,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-23 21:45:55,738 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-23 21:45:55,750 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-23 21:45:55,752 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-23 21:45:55,753 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-23 21:45:55,754 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-23 21:45:55,755 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-23 21:45:55,756 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-23 21:45:55,758 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-23 21:45:55,761 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-23 21:45:55,762 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-23 21:45:55,764 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-23 21:45:55,765 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-23 21:45:55,766 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-23 21:45:55,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-23 21:45:55,780 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-23 21:45:55,781 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-23 21:45:55,782 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-23 21:45:55,789 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-23 21:45:55,810 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-23 21:45:55,811 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-23 21:45:55,812 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-23 21:45:55,813 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-23 21:45:55,813 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-23 21:45:55,814 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-23 21:45:55,814 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-23 21:45:55,814 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-23 21:45:55,815 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-23 21:45:55,815 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-23 21:45:55,816 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-23 21:45:55,816 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-23 21:45:55,816 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-23 21:45:55,816 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-23 21:45:55,817 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-23 21:45:55,817 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-23 21:45:55,817 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-23 21:45:55,817 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-23 21:45:55,817 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-23 21:45:55,818 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-23 21:45:55,818 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-23 21:45:55,818 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-23 21:45:55,818 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-10-23 21:45:56,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-23 21:45:56,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-23 21:45:56,280 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-23 21:45:56,281 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-23 21:45:56,282 INFO L275 PluginConnector]: CDTParser initialized [2020-10-23 21:45:56,283 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-10-23 21:45:56,356 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73be0a734/ed1c3ffcbbe94becb629f707587e6459/FLAGf58de522b [2020-10-23 21:45:57,059 INFO L306 CDTParser]: Found 1 translation units. [2020-10-23 21:45:57,059 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2020-10-23 21:45:57,066 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73be0a734/ed1c3ffcbbe94becb629f707587e6459/FLAGf58de522b [2020-10-23 21:45:57,410 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/73be0a734/ed1c3ffcbbe94becb629f707587e6459 [2020-10-23 21:45:57,413 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-23 21:45:57,420 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-23 21:45:57,422 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:57,422 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-23 21:45:57,426 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-23 21:45:57,427 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5922b6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57, skipping insertion in model container [2020-10-23 21:45:57,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,439 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-23 21:45:57,455 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-23 21:45:57,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:57,634 INFO L203 MainTranslator]: Completed pre-run [2020-10-23 21:45:57,659 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-23 21:45:57,676 INFO L208 MainTranslator]: Completed translation [2020-10-23 21:45:57,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57 WrapperNode [2020-10-23 21:45:57,677 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-23 21:45:57,678 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-23 21:45:57,678 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-23 21:45:57,679 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-23 21:45:57,693 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,693 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,701 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,702 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,708 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,714 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (1/1) ... [2020-10-23 21:45:57,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-23 21:45:57,718 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-23 21:45:57,718 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-23 21:45:57,718 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-23 21:45:57,719 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (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 [2020-10-23 21:45:57,796 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-23 21:45:57,797 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-23 21:45:57,797 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-23 21:45:57,797 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-23 21:45:57,797 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-23 21:45:57,797 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-23 21:45:57,797 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-23 21:45:57,798 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-23 21:45:57,798 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-23 21:45:57,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-23 21:45:57,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-23 21:45:57,798 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-23 21:45:57,798 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-23 21:45:57,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-23 21:45:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-23 21:45:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-23 21:45:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-23 21:45:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-23 21:45:57,799 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-23 21:45:58,087 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-23 21:45:58,087 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-23 21:45:58,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:58 BoogieIcfgContainer [2020-10-23 21:45:58,089 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-23 21:45:58,091 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-23 21:45:58,091 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-23 21:45:58,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-23 21:45:58,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.10 09:45:57" (1/3) ... [2020-10-23 21:45:58,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5e46f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:58, skipping insertion in model container [2020-10-23 21:45:58,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.10 09:45:57" (2/3) ... [2020-10-23 21:45:58,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f5e46f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.10 09:45:58, skipping insertion in model container [2020-10-23 21:45:58,097 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.10 09:45:58" (3/3) ... [2020-10-23 21:45:58,098 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-10-23 21:45:58,112 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-23 21:45:58,118 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-23 21:45:58,133 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-23 21:45:58,162 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-23 21:45:58,162 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-23 21:45:58,162 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-10-23 21:45:58,163 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-23 21:45:58,163 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-23 21:45:58,163 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-23 21:45:58,163 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-23 21:45:58,163 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-23 21:45:58,182 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-23 21:45:58,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 21:45:58,195 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:58,196 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] [2020-10-23 21:45:58,196 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:58,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:58,209 INFO L82 PathProgramCache]: Analyzing trace with hash -845575077, now seen corresponding path program 1 times [2020-10-23 21:45:58,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:58,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1897936022] [2020-10-23 21:45:58,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:58,380 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:58,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:58,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:58,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:58,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:58,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1897936022] [2020-10-23 21:45:58,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:58,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-23 21:45:58,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642381944] [2020-10-23 21:45:58,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-23 21:45:58,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:58,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-23 21:45:58,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:45:58,823 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2020-10-23 21:45:58,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:58,994 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-23 21:45:58,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-23 21:45:58,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-23 21:45:58,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:59,009 INFO L225 Difference]: With dead ends: 73 [2020-10-23 21:45:59,009 INFO L226 Difference]: Without dead ends: 38 [2020-10-23 21:45:59,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-23 21:45:59,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-23 21:45:59,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-23 21:45:59,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-23 21:45:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-23 21:45:59,104 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-10-23 21:45:59,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:59,106 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-23 21:45:59,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-23 21:45:59,106 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-23 21:45:59,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 21:45:59,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:59,111 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] [2020-10-23 21:45:59,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-23 21:45:59,112 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:59,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:59,113 INFO L82 PathProgramCache]: Analyzing trace with hash 644330067, now seen corresponding path program 1 times [2020-10-23 21:45:59,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:59,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529273584] [2020-10-23 21:45:59,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:59,128 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:59,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:59,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:59,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:59,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:59,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529273584] [2020-10-23 21:45:59,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:59,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:45:59,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886461569] [2020-10-23 21:45:59,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:45:59,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:59,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:45:59,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:45:59,357 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 5 states. [2020-10-23 21:45:59,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:45:59,599 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-23 21:45:59,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 21:45:59,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-23 21:45:59,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:45:59,603 INFO L225 Difference]: With dead ends: 59 [2020-10-23 21:45:59,603 INFO L226 Difference]: Without dead ends: 52 [2020-10-23 21:45:59,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:45:59,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-23 21:45:59,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-10-23 21:45:59,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-23 21:45:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-23 21:45:59,623 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 32 [2020-10-23 21:45:59,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:45:59,623 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-23 21:45:59,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:45:59,624 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-23 21:45:59,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-23 21:45:59,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:45:59,625 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] [2020-10-23 21:45:59,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-23 21:45:59,626 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:45:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:45:59,627 INFO L82 PathProgramCache]: Analyzing trace with hash 151369203, now seen corresponding path program 1 times [2020-10-23 21:45:59,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:45:59,627 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792314248] [2020-10-23 21:45:59,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:45:59,630 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:45:59,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:59,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-23 21:45:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-23 21:45:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-23 21:45:59,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792314248] [2020-10-23 21:45:59,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-23 21:45:59,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-23 21:45:59,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694821304] [2020-10-23 21:45:59,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-23 21:45:59,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-23 21:45:59,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-23 21:45:59,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-23 21:45:59,920 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 5 states. [2020-10-23 21:46:00,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-23 21:46:00,287 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-23 21:46:00,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-23 21:46:00,289 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-23 21:46:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-23 21:46:00,292 INFO L225 Difference]: With dead ends: 60 [2020-10-23 21:46:00,292 INFO L226 Difference]: Without dead ends: 53 [2020-10-23 21:46:00,294 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-23 21:46:00,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-23 21:46:00,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-10-23 21:46:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-23 21:46:00,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-23 21:46:00,320 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2020-10-23 21:46:00,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-23 21:46:00,321 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-23 21:46:00,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-23 21:46:00,322 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-23 21:46:00,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-23 21:46:00,325 INFO L414 BasicCegarLoop]: Found error trace [2020-10-23 21:46:00,325 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, 1] [2020-10-23 21:46:00,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-23 21:46:00,326 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-23 21:46:00,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-23 21:46:00,327 INFO L82 PathProgramCache]: Analyzing trace with hash -601466224, now seen corresponding path program 1 times [2020-10-23 21:46:00,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-23 21:46:00,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1788616656] [2020-10-23 21:46:00,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-23 21:46:00,923 WARN L193 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 79 [2020-10-23 21:46:00,940 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-10-23 21:46:00,942 INFO L321 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-10-23 21:46:00,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:46:00,984 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:46:01,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-23 21:46:01,018 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-23 21:46:01,063 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-23 21:46:01,063 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-23 21:46:01,064 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-23 21:46:01,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.10 09:46:01 BoogieIcfgContainer [2020-10-23 21:46:01,086 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-23 21:46:01,091 INFO L168 Benchmark]: Toolchain (without parser) took 3672.92 ms. Allocated memory was 125.8 MB in the beginning and 159.4 MB in the end (delta: 33.6 MB). Free memory was 102.7 MB in the beginning and 62.2 MB in the end (delta: 40.5 MB). Peak memory consumption was 75.0 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:01,092 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 87.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-23 21:46:01,093 INFO L168 Benchmark]: CACSL2BoogieTranslator took 255.81 ms. Allocated memory is still 125.8 MB. Free memory was 102.1 MB in the beginning and 92.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:01,095 INFO L168 Benchmark]: Boogie Preprocessor took 38.53 ms. Allocated memory is still 125.8 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:01,097 INFO L168 Benchmark]: RCFGBuilder took 371.71 ms. Allocated memory was 125.8 MB in the beginning and 159.4 MB in the end (delta: 33.6 MB). Free memory was 90.9 MB in the beginning and 143.7 MB in the end (delta: -52.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:01,100 INFO L168 Benchmark]: TraceAbstraction took 2995.30 ms. Allocated memory is still 159.4 MB. Free memory was 143.4 MB in the beginning and 62.2 MB in the end (delta: 81.2 MB). Peak memory consumption was 81.7 MB. Max. memory is 8.0 GB. [2020-10-23 21:46:01,109 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 125.8 MB. Free memory is still 87.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 255.81 ms. Allocated memory is still 125.8 MB. Free memory was 102.1 MB in the beginning and 92.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.53 ms. Allocated memory is still 125.8 MB. Free memory was 92.5 MB in the beginning and 91.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 371.71 ms. Allocated memory was 125.8 MB in the beginning and 159.4 MB in the end (delta: 33.6 MB). Free memory was 90.9 MB in the beginning and 143.7 MB in the end (delta: -52.8 MB). Peak memory consumption was 20.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2995.30 ms. Allocated memory is still 159.4 MB. Free memory was 143.4 MB in the beginning and 62.2 MB in the end (delta: 81.2 MB). Peak memory consumption was 81.7 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 3]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_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] CALL reach_error() [L3] __assert_fail("0", "nec20.c", 3, "reach_error") - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 125 SDslu, 58 SDs, 0 SdLazy, 122 SolverSat, 9 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred 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...