/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/sum_array-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-b8ad66e [2020-10-24 02:24:41,505 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-24 02:24:41,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-24 02:24:41,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-10-24 02:24:41,602 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-24 02:24:41,605 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-24 02:24:41,608 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-24 02:24:41,610 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-24 02:24:41,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-24 02:24:41,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-24 02:24:41,621 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-24 02:24:41,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-24 02:24:41,628 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-24 02:24:41,632 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-24 02:24:41,633 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-24 02:24:41,635 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-24 02:24:41,638 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-24 02:24:41,652 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 02:24:41,664 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-24 02:24:41,665 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-24 02:24:41,666 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-24 02:24:41,667 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-24 02:24:41,667 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-24 02:24:41,667 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-24 02:24:41,668 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-24 02:24:41,668 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-24 02:24:41,668 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-24 02:24:41,668 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-24 02:24:41,669 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-24 02:24:41,669 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-24 02:24:41,669 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-24 02:24:41,669 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-24 02:24:41,670 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-24 02:24:41,670 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-10-24 02:24:41,670 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-24 02:24:41,671 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-24 02:24:41,671 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-24 02:24:41,671 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-24 02:24:41,671 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-10-24 02:24:41,672 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-24 02:24:41,672 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-10-24 02:24:42,038 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-24 02:24:42,078 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-24 02:24:42,082 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-24 02:24:42,083 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-24 02:24:42,084 INFO L275 PluginConnector]: CDTParser initialized [2020-10-24 02:24:42,085 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum_array-1.c [2020-10-24 02:24:42,167 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae44cacc/cc650a7c85924db1ac8dd5758b883f22/FLAG1eb9fde5d [2020-10-24 02:24:42,831 INFO L306 CDTParser]: Found 1 translation units. [2020-10-24 02:24:42,831 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum_array-1.c [2020-10-24 02:24:42,839 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae44cacc/cc650a7c85924db1ac8dd5758b883f22/FLAG1eb9fde5d [2020-10-24 02:24:43,176 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ae44cacc/cc650a7c85924db1ac8dd5758b883f22 [2020-10-24 02:24:43,180 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-24 02:24:43,188 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-24 02:24:43,193 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:43,194 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-24 02:24:43,198 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-24 02:24:43,199 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11281871 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43, skipping insertion in model container [2020-10-24 02:24:43,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-24 02:24:43,234 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-24 02:24:43,408 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:43,418 INFO L203 MainTranslator]: Completed pre-run [2020-10-24 02:24:43,444 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-24 02:24:43,463 INFO L208 MainTranslator]: Completed translation [2020-10-24 02:24:43,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43 WrapperNode [2020-10-24 02:24:43,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-24 02:24:43,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-24 02:24:43,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-24 02:24:43,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-24 02:24:43,481 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,481 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,491 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,500 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,506 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,509 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (1/1) ... [2020-10-24 02:24:43,511 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-24 02:24:43,513 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-24 02:24:43,513 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-24 02:24:43,513 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-24 02:24:43,514 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (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 02:24:43,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-24 02:24:43,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-24 02:24:43,621 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-24 02:24:43,621 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-24 02:24:43,621 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-24 02:24:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-24 02:24:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-24 02:24:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-24 02:24:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-24 02:24:43,622 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-24 02:24:43,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-24 02:24:43,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-10-24 02:24:43,623 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-24 02:24:43,623 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-24 02:24:43,623 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-24 02:24:43,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-24 02:24:43,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-24 02:24:43,624 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-24 02:24:43,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-24 02:24:44,387 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-24 02:24:44,387 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-24 02:24:44,389 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:44 BoogieIcfgContainer [2020-10-24 02:24:44,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-24 02:24:44,397 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-24 02:24:44,398 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-24 02:24:44,401 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-24 02:24:44,402 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.10 02:24:43" (1/3) ... [2020-10-24 02:24:44,403 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4541bd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:44, skipping insertion in model container [2020-10-24 02:24:44,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.10 02:24:43" (2/3) ... [2020-10-24 02:24:44,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4541bd65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.10 02:24:44, skipping insertion in model container [2020-10-24 02:24:44,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.10 02:24:44" (3/3) ... [2020-10-24 02:24:44,406 INFO L111 eAbstractionObserver]: Analyzing ICFG sum_array-1.c [2020-10-24 02:24:44,422 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-24 02:24:44,430 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-24 02:24:44,450 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-24 02:24:44,487 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-24 02:24:44,488 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-24 02:24:44,488 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-24 02:24:44,489 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-24 02:24:44,489 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-24 02:24:44,489 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-24 02:24:44,489 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-24 02:24:44,489 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-24 02:24:44,515 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states. [2020-10-24 02:24:44,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-24 02:24:44,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:44,532 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] [2020-10-24 02:24:44,533 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:44,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:44,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1982843023, now seen corresponding path program 1 times [2020-10-24 02:24:44,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:44,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917762620] [2020-10-24 02:24:44,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:44,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:44,909 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 02:24:44,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917762620] [2020-10-24 02:24:44,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:44,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-24 02:24:44,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282875609] [2020-10-24 02:24:44,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-24 02:24:44,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:44,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-24 02:24:44,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-24 02:24:44,937 INFO L87 Difference]: Start difference. First operand 76 states. Second operand 3 states. [2020-10-24 02:24:45,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:45,252 INFO L93 Difference]: Finished difference Result 123 states and 139 transitions. [2020-10-24 02:24:45,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-24 02:24:45,255 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 34 [2020-10-24 02:24:45,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:45,266 INFO L225 Difference]: With dead ends: 123 [2020-10-24 02:24:45,266 INFO L226 Difference]: Without dead ends: 63 [2020-10-24 02:24:45,270 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 [2020-10-24 02:24:45,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-24 02:24:45,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-24 02:24:45,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-24 02:24:45,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-24 02:24:45,328 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 34 [2020-10-24 02:24:45,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:45,329 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-24 02:24:45,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-24 02:24:45,329 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-24 02:24:45,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-24 02:24:45,331 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:45,331 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] [2020-10-24 02:24:45,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-24 02:24:45,332 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 499487449, now seen corresponding path program 1 times [2020-10-24 02:24:45,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:45,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077983065] [2020-10-24 02:24:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:45,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-24 02:24:45,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-24 02:24:45,698 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 02:24:45,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077983065] [2020-10-24 02:24:45,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-24 02:24:45,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-24 02:24:45,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566215270] [2020-10-24 02:24:45,702 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-24 02:24:45,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-24 02:24:45,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-24 02:24:45,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:45,711 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 6 states. [2020-10-24 02:24:46,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-24 02:24:46,046 INFO L93 Difference]: Finished difference Result 135 states and 146 transitions. [2020-10-24 02:24:46,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-24 02:24:46,047 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 34 [2020-10-24 02:24:46,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-24 02:24:46,051 INFO L225 Difference]: With dead ends: 135 [2020-10-24 02:24:46,051 INFO L226 Difference]: Without dead ends: 93 [2020-10-24 02:24:46,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-24 02:24:46,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-24 02:24:46,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-10-24 02:24:46,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-24 02:24:46,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 69 transitions. [2020-10-24 02:24:46,071 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 69 transitions. Word has length 34 [2020-10-24 02:24:46,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-24 02:24:46,072 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 69 transitions. [2020-10-24 02:24:46,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-24 02:24:46,072 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 69 transitions. [2020-10-24 02:24:46,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-24 02:24:46,074 INFO L414 BasicCegarLoop]: Found error trace [2020-10-24 02:24:46,074 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-24 02:24:46,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-24 02:24:46,075 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-24 02:24:46,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-24 02:24:46,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1895477852, now seen corresponding path program 1 times [2020-10-24 02:24:46,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-24 02:24:46,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32736497] [2020-10-24 02:24:46,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-24 02:24:46,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:24:46,183 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:24:46,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-24 02:24:46,295 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-24 02:24:46,336 INFO L173 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-10-24 02:24:46,337 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-10-24 02:24:46,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-24 02:24:46,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.10 02:24:46 BoogieIcfgContainer [2020-10-24 02:24:46,401 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-24 02:24:46,404 INFO L168 Benchmark]: Toolchain (without parser) took 3219.74 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 126.7 MB in the beginning and 133.9 MB in the end (delta: -7.3 MB). Peak memory consumption was 34.3 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:46,405 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 151.0 MB. Free memory is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-24 02:24:46,409 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 115.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:46,410 INFO L168 Benchmark]: Boogie Preprocessor took 46.57 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:46,411 INFO L168 Benchmark]: RCFGBuilder took 879.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 130.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:46,413 INFO L168 Benchmark]: TraceAbstraction took 2003.79 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 129.4 MB in the beginning and 133.9 MB in the end (delta: -4.5 MB). Peak memory consumption was 36.9 MB. Max. memory is 8.0 GB. [2020-10-24 02:24:46,417 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 is still 129.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 270.77 ms. Allocated memory is still 151.0 MB. Free memory was 126.1 MB in the beginning and 115.9 MB in the end (delta: 10.2 MB). Peak memory consumption was 10.5 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 46.57 ms. Allocated memory is still 151.0 MB. Free memory was 115.9 MB in the beginning and 114.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 879.45 ms. Allocated memory is still 151.0 MB. Free memory was 114.1 MB in the beginning and 130.0 MB in the end (delta: -15.9 MB). Peak memory consumption was 19.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 2003.79 ms. Allocated memory was 151.0 MB in the beginning and 191.9 MB in the end (delta: 40.9 MB). Free memory was 129.4 MB in the beginning and 133.9 MB in the end (delta: -4.5 MB). Peak memory consumption was 36.9 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: [L16] unsigned int M = __VERIFIER_nondet_uint(); VAL [__VERIFIER_nondet_uint()=4294967297, M=1] [L17] int A[M], B[M], C[M]; VAL [A={18:0}, B={19:0}, C={13:0}, M=1] [L18] unsigned int i; VAL [A={18:0}, B={19:0}, C={13:0}, M=1] [L20] i=0 VAL [A={18:0}, B={19:0}, C={13:0}, i=0, M=1] [L20] COND TRUE i