/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/nec20.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:24:29,915 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:24:29,918 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:24:29,956 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:24:29,970 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:24:29,972 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:24:29,973 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:24:29,975 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:24:29,976 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:24:29,977 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:24:29,980 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:24:29,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:24:30,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:24:30,004 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:24:30,008 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:24:30,010 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:24:30,014 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:24:30,026 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-24 02:24:30,027 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-24 02:24:30,028 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-24 02:24:30,030 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-10-24 02:24:30,043 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:24:30,043 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:24:30,045 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:24:30,045 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:24:30,046 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:24:30,046 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:24:30,046 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:24:30,046 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:24:30,047 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:24:30,047 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:24:30,047 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:24:30,047 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:24:30,047 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:24:30,048 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:24:30,048 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:24:30,048 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:24:30,048 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:24:30,049 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:24:30,049 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:24:30,049 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:24:30,049 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:24:30,050 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:24:30,050 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:24:30,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:24:30,466 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:24:30,470 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:24:30,471 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:24:30,472 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:24:30,473 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/nec20.c [2020-10-24 02:24:30,571 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ea6474a6/96693207057f44528680fd034f5d7249/FLAGdbeab6537 [2020-10-24 02:24:31,344 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:24:31,345 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/nec20.c [2020-10-24 02:24:31,353 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ea6474a6/96693207057f44528680fd034f5d7249/FLAGdbeab6537 [2020-10-24 02:24:31,683 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ea6474a6/96693207057f44528680fd034f5d7249 [2020-10-24 02:24:31,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:24:31,698 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:24:31,705 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:31,705 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:24:31,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:24:31,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:31" (1/1) ... [2020-10-24 02:24:31,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@48c096cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:31, skipping insertion in model container [2020-10-24 02:24:31,721 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:31" (1/1) ... [2020-10-24 02:24:31,731 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:24:31,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:24:32,003 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:32,013 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:24:32,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:32,054 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:24:32,055 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32 WrapperNode [2020-10-24 02:24:32,055 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:32,057 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:24:32,057 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:24:32,057 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:24:32,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,072 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,085 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,091 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,092 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (1/1) ... [2020-10-24 02:24:32,095 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:24:32,096 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:24:32,096 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:24:32,097 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:24:32,098 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (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 [2020-10-24 02:24:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:24:32,179 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:24:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:24:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:24:32,180 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:24:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:24:32,180 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:24:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:24:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:24:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-24 02:24:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:24:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-24 02:24:32,181 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:24:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:24:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:24:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:24:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:24:32,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:24:32,183 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:24:32,574 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:24:32,575 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-24 02:24:32,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:32 BoogieIcfgContainer [2020-10-24 02:24:32,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:24:32,584 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:24:32,584 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:24:32,588 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:24:32,589 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:24:31" (1/3) ... [2020-10-24 02:24:32,590 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:32, skipping insertion in model container [2020-10-24 02:24:32,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:32" (2/3) ... [2020-10-24 02:24:32,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15d1eba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:32, skipping insertion in model container [2020-10-24 02:24:32,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:32" (3/3) ... [2020-10-24 02:24:32,593 INFO L111 eAbstractionObserver]: Analyzing ICFG nec20.c [2020-10-24 02:24:32,608 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:24:32,615 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:24:32,631 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:24:32,675 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:24:32,676 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:24:32,676 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:24:32,676 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:24:32,676 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:24:32,677 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:24:32,677 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:24:32,677 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:24:32,702 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-24 02:24:32,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 02:24:32,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:32,717 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] [2020-10-24 02:24:32,718 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:32,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:32,728 INFO L82 PathProgramCache]: Analyzing trace with hash -845575077, now seen corresponding path program 1 times [2020-10-24 02:24:32,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:32,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1279274127] [2020-10-24 02:24:32,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,199 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-24 02:24:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:33,265 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1279274127] [2020-10-24 02:24:33,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:33,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:24:33,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707436337] [2020-10-24 02:24:33,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:24:33,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:33,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:24:33,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:24:33,303 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 3 states. [2020-10-24 02:24:33,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:33,435 INFO L93 Difference]: Finished difference Result 73 states and 81 transitions. [2020-10-24 02:24:33,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:24:33,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2020-10-24 02:24:33,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:33,446 INFO L225 Difference]: With dead ends: 73 [2020-10-24 02:24:33,446 INFO L226 Difference]: Without dead ends: 38 [2020-10-24 02:24:33,450 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 [2020-10-24 02:24:33,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-24 02:24:33,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-10-24 02:24:33,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-24 02:24:33,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-10-24 02:24:33,501 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 32 [2020-10-24 02:24:33,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:33,502 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-10-24 02:24:33,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:24:33,502 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-10-24 02:24:33,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 02:24:33,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:33,504 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] [2020-10-24 02:24:33,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:24:33,505 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:33,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:33,506 INFO L82 PathProgramCache]: Analyzing trace with hash 644330067, now seen corresponding path program 1 times [2020-10-24 02:24:33,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:33,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238729973] [2020-10-24 02:24:33,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:33,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:33,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:33,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238729973] [2020-10-24 02:24:33,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:33,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:24:33,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150037376] [2020-10-24 02:24:33,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:24:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:24:33,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:24:33,675 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 5 states. [2020-10-24 02:24:33,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:33,988 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2020-10-24 02:24:33,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:24:33,989 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-24 02:24:33,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:33,992 INFO L225 Difference]: With dead ends: 59 [2020-10-24 02:24:33,992 INFO L226 Difference]: Without dead ends: 52 [2020-10-24 02:24:33,994 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 [2020-10-24 02:24:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-24 02:24:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 43. [2020-10-24 02:24:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-24 02:24:34,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-10-24 02:24:34,011 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 32 [2020-10-24 02:24:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:34,011 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-10-24 02:24:34,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:24:34,012 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-10-24 02:24:34,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-24 02:24:34,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:34,013 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] [2020-10-24 02:24:34,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:24:34,014 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:34,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:34,015 INFO L82 PathProgramCache]: Analyzing trace with hash 151369203, now seen corresponding path program 1 times [2020-10-24 02:24:34,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:34,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262974782] [2020-10-24 02:24:34,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:34,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:34,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:34,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:34,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-24 02:24:34,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262974782] [2020-10-24 02:24:34,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:34,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-24 02:24:34,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149561936] [2020-10-24 02:24:34,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-24 02:24:34,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:34,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-24 02:24:34,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-24 02:24:34,188 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 5 states. [2020-10-24 02:24:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:34,428 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-10-24 02:24:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:24:34,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-24 02:24:34,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:34,430 INFO L225 Difference]: With dead ends: 60 [2020-10-24 02:24:34,430 INFO L226 Difference]: Without dead ends: 53 [2020-10-24 02:24:34,431 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-24 02:24:34,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-24 02:24:34,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 39. [2020-10-24 02:24:34,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-24 02:24:34,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-10-24 02:24:34,446 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 32 [2020-10-24 02:24:34,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:34,447 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-10-24 02:24:34,447 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-24 02:24:34,448 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-10-24 02:24:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-24 02:24:34,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:34,449 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] [2020-10-24 02:24:34,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:24:34,450 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:34,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:34,450 INFO L82 PathProgramCache]: Analyzing trace with hash -601466224, now seen corresponding path program 1 times [2020-10-24 02:24:34,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:34,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577465221] [2020-10-24 02:24:34,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:34,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:24:34,508 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:24:34,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:24:34,556 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:24:34,586 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:24:34,587 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:24:34,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-24 02:24:34,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:24:34 BoogieIcfgContainer [2020-10-24 02:24:34,661 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:24:34,664 INFO L168 Benchmark]: Toolchain (without parser) took 2972.15 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 127.5 MB in the beginning and 174.6 MB in the end (delta: -47.1 MB). Peak memory consumption was 68.6 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:34,665 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:24:34,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 351.14 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:34,671 INFO L168 Benchmark]: Boogie Preprocessor took 38.72 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:34,675 INFO L168 Benchmark]: RCFGBuilder took 483.40 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 132.0 MB in the end (delta: -16.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:34,677 INFO L168 Benchmark]: TraceAbstraction took 2077.39 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 132.0 MB in the beginning and 174.6 MB in the end (delta: -42.5 MB). Peak memory consumption was 72.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:34,687 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory was 125.3 MB in the beginning and 125.2 MB in the end (delta: 80.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 351.14 ms. Allocated memory is still 151.0 MB. Free memory was 126.9 MB in the beginning and 117.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.4 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 38.72 ms. Allocated memory is still 151.0 MB. Free memory was 117.4 MB in the beginning and 116.0 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 483.40 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 132.0 MB in the end (delta: -16.2 MB). Peak memory consumption was 17.2 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2077.39 ms. Allocated memory was 151.0 MB in the beginning and 196.1 MB in the end (delta: 45.1 MB). Free memory was 132.0 MB in the beginning and 174.6 MB in the end (delta: -42.5 MB). Peak memory consumption was 72.4 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; VAL [\old(b)=261, b=0] [L15] _Bool k=__VERIFIER_nondet_bool(); VAL [__VERIFIER_nondet_bool()=257, b=0, k=1] [L16] unsigned int i,n,j; VAL [b=0, k=1] [L17] int a[1025]; VAL [b=0, k=1] [L19] COND TRUE \read(k) VAL [b=0, k=1] [L20] n=0 VAL [b=0, k=1, n=0] [L25] i=0 VAL [b=0, i=0, k=1, n=0] [L26] j=__VERIFIER_nondet_uint() VAL [__VERIFIER_nondet_uint()=-4294966273, b=0, i=0, j=-4294966273, k=1, n=0] [L27] COND FALSE !(j > 10000) VAL [b=0, i=0, j=-4294966273, k=1, n=0] [L30] COND TRUE i <= n VAL [b=0, i=0, j=-4294966273, k=1, n=0] [L31] i++ VAL [b=0, i=1, j=-4294966273, k=1, n=0] [L32] j= j +2 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L30] COND FALSE !(i <= n) VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L35] a[i]=0 VAL [b=0, i=1, j=-4294966271, k=1, n=0] [L36] CALL __VERIFIER_assert(j<1025) VAL [\old(cond)=0, b=0] [L7] COND TRUE !(cond) VAL [\old(cond)=0, b=0, cond=0] [L8] CALL reach_error() VAL [b=0] [L3] __assert_fail("0", "nec20.c", 3, "reach_error") VAL [b=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 54 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.9s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.7s, 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, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s 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: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 23 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 133 NumberOfCodeBlocks, 133 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 8804 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...