/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-fpi/brs4f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-3af5e1f [2020-09-04 17:43:21,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:43:21,398 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:43:21,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:43:21,443 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:43:21,453 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:43:21,455 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:43:21,460 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:43:21,463 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:43:21,466 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:43:21,467 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:43:21,468 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:43:21,469 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:43:21,472 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:43:21,474 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:43:21,476 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:43:21,478 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:43:21,479 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:43:21,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:43:21,490 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:43:21,492 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:43:21,493 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:43:21,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:43:21,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:43:21,498 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:43:21,509 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:43:21,510 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:43:21,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:43:21,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:43:21,533 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:43:21,533 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:43:21,535 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:43:21,535 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:43:21,535 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:43:21,535 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:43:21,536 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:43:21,536 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:43:21,536 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:43:21,536 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:43:21,538 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:43:21,538 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:43:21,538 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:43:21,538 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:43:21,539 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:43:21,539 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:43:21,539 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:43:21,539 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:43:21,539 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:43:21,540 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:43:21,541 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:43:21,541 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:43:21,541 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:43:21,956 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:43:21,977 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:43:21,981 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:43:21,983 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:43:21,983 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:43:21,985 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs4f.c [2020-09-04 17:43:22,086 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a78856bb/d034ddf1719042349b714729af672ec9/FLAGb724c30b9 [2020-09-04 17:43:22,624 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:43:22,625 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/brs4f.c [2020-09-04 17:43:22,634 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a78856bb/d034ddf1719042349b714729af672ec9/FLAGb724c30b9 [2020-09-04 17:43:22,962 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3a78856bb/d034ddf1719042349b714729af672ec9 [2020-09-04 17:43:22,975 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:43:22,977 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:43:22,978 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:22,978 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:43:22,982 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:43:22,983 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:22" (1/1) ... [2020-09-04 17:43:22,987 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34855c0f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:22, skipping insertion in model container [2020-09-04 17:43:22,987 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:43:22" (1/1) ... [2020-09-04 17:43:22,994 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:43:23,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:43:23,227 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:23,237 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:43:23,259 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:43:23,276 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:43:23,276 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23 WrapperNode [2020-09-04 17:43:23,276 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:43:23,277 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:43:23,277 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:43:23,277 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:43:23,371 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,371 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,381 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,381 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,389 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... [2020-09-04 17:43:23,399 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:43:23,400 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:43:23,400 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:43:23,400 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:43:23,401 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 17:43:23,477 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:43:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:43:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 17:43:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:43:23,478 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:43:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:43:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 17:43:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 17:43:23,479 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:43:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 17:43:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-04 17:43:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:43:23,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-04 17:43:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-04 17:43:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-04 17:43:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-04 17:43:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-04 17:43:23,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:43:23,482 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:43:23,816 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:43:23,816 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-04 17:43:23,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:23 BoogieIcfgContainer [2020-09-04 17:43:23,822 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:43:23,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:43:23,824 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:43:23,827 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:43:23,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:43:22" (1/3) ... [2020-09-04 17:43:23,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36457a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:23, skipping insertion in model container [2020-09-04 17:43:23,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:43:23" (2/3) ... [2020-09-04 17:43:23,829 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@36457a58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:43:23, skipping insertion in model container [2020-09-04 17:43:23,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:43:23" (3/3) ... [2020-09-04 17:43:23,831 INFO L109 eAbstractionObserver]: Analyzing ICFG brs4f.c [2020-09-04 17:43:23,843 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:43:23,852 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:43:23,875 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:43:23,903 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:43:23,903 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:43:23,904 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:43:23,904 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:43:23,904 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:43:23,904 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:43:23,904 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:43:23,905 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:43:23,923 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-09-04 17:43:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 17:43:23,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:23,938 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] [2020-09-04 17:43:23,938 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:23,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:23,944 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-09-04 17:43:23,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:23,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64635588] [2020-09-04 17:43:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:24,021 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:24,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:24,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:43:24,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:24,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64635588] [2020-09-04 17:43:24,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:24,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:43:24,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11796683] [2020-09-04 17:43:24,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:43:24,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:24,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:43:24,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:43:24,238 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-09-04 17:43:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:24,401 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-09-04 17:43:24,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:43:24,404 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-09-04 17:43:24,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:24,415 INFO L225 Difference]: With dead ends: 101 [2020-09-04 17:43:24,415 INFO L226 Difference]: Without dead ends: 47 [2020-09-04 17:43:24,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:43:24,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-09-04 17:43:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-09-04 17:43:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-04 17:43:24,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-09-04 17:43:24,472 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-09-04 17:43:24,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:24,473 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-09-04 17:43:24,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:43:24,473 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-09-04 17:43:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-04 17:43:24,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:24,475 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] [2020-09-04 17:43:24,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:43:24,476 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:24,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:24,476 INFO L82 PathProgramCache]: Analyzing trace with hash -151091841, now seen corresponding path program 1 times [2020-09-04 17:43:24,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:24,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634869568] [2020-09-04 17:43:24,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:24,480 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:43:24,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-04 17:43:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:43:24,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:43:24,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634869568] [2020-09-04 17:43:24,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:43:24,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-04 17:43:24,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761675854] [2020-09-04 17:43:24,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-04 17:43:24,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:43:24,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-04 17:43:24,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-04 17:43:24,613 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-09-04 17:43:24,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:43:24,789 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-09-04 17:43:24,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-04 17:43:24,789 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-09-04 17:43:24,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:43:24,791 INFO L225 Difference]: With dead ends: 81 [2020-09-04 17:43:24,791 INFO L226 Difference]: Without dead ends: 56 [2020-09-04 17:43:24,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-04 17:43:24,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-04 17:43:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-09-04 17:43:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 17:43:24,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-09-04 17:43:24,809 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 30 [2020-09-04 17:43:24,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:43:24,810 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-09-04 17:43:24,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-04 17:43:24,810 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-09-04 17:43:24,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 17:43:24,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:43:24,812 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] [2020-09-04 17:43:24,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:43:24,813 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:43:24,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:43:24,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-09-04 17:43:24,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:43:24,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637554840] [2020-09-04 17:43:24,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:43:24,840 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:43:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:43:24,882 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:43:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-04 17:43:24,929 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-09-04 17:43:24,975 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-04 17:43:24,975 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-04 17:43:24,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:43:24,998 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 05:43:24 BoogieIcfgContainer [2020-09-04 17:43:24,998 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 17:43:25,002 INFO L168 Benchmark]: Toolchain (without parser) took 2023.96 ms. Allocated memory was 140.5 MB in the beginning and 234.4 MB in the end (delta: 93.8 MB). Free memory was 104.0 MB in the beginning and 201.3 MB in the end (delta: -97.3 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:43:25,003 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 140.5 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:43:25,004 INFO L168 Benchmark]: CACSL2BoogieTranslator took 298.86 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:25,005 INFO L168 Benchmark]: Boogie Preprocessor took 122.15 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 93.2 MB in the beginning and 181.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:25,006 INFO L168 Benchmark]: RCFGBuilder took 422.35 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 163.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:43:25,007 INFO L168 Benchmark]: TraceAbstraction took 1174.90 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 163.4 MB in the beginning and 201.3 MB in the end (delta: -37.9 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:43:25,011 INFO L336 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 140.5 MB. Free memory was 123.1 MB in the beginning and 122.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 298.86 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.15 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 93.2 MB in the beginning and 181.8 MB in the end (delta: -88.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 422.35 ms. Allocated memory is still 204.5 MB. Free memory was 181.8 MB in the beginning and 163.4 MB in the end (delta: 18.4 MB). Peak memory consumption was 18.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1174.90 ms. Allocated memory was 204.5 MB in the beginning and 234.4 MB in the end (delta: 29.9 MB). Free memory was 163.4 MB in the beginning and 201.3 MB in the end (delta: -37.9 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L17] int N; [L21] N = __VERIFIER_nondet_int() [L22] COND FALSE !(N <= 0) [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) [L11] COND FALSE !(!cond) [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) [L25] int i; [L26] long long sum[1]; [L27] int *a = malloc(sizeof(int)*N); [L29] i=0 [L29] COND TRUE i