/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 --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/array-fpi/brs5f.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 22:59:39,355 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 22:59:39,358 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 22:59:39,401 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 22:59:39,401 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 22:59:39,412 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 22:59:39,414 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 22:59:39,419 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 22:59:39,421 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 22:59:39,425 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 22:59:39,425 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 22:59:39,426 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 22:59:39,426 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 22:59:39,429 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 22:59:39,432 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 22:59:39,433 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 22:59:39,435 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 22:59:39,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 22:59:39,439 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 22:59:39,445 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 22:59:39,448 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 22:59:39,449 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 22:59:39,450 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 22:59:39,451 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 22:59:39,456 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 22:59:39,467 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 22:59:39,468 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 22:59:39,469 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 22:59:39,470 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 22:59:39,488 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 22:59:39,488 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 22:59:39,491 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 22:59:39,491 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 22:59:39,492 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 22:59:39,492 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 22:59:39,493 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 22:59:39,493 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 22:59:39,493 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 22:59:39,493 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 22:59:39,494 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 22:59:39,495 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 22:59:39,495 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 22:59:39,495 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 22:59:39,496 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 22:59:39,496 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 22:59:39,496 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 22:59:39,496 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 22:59:39,497 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 22:59:39,497 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 22:59:39,498 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 22:59:39,498 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 22:59:39,498 INFO L138 SettingsManager]: * Use separate solver for trace checks=false 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 [2020-08-22 22:59:39,770 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 22:59:39,786 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 22:59:39,793 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 22:59:39,795 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 22:59:39,795 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 22:59:39,796 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/brs5f.c [2020-08-22 22:59:39,870 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6221e0558/89714382388641a8bd144e9033345ee6/FLAG1092c2ddb [2020-08-22 22:59:40,357 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 22:59:40,357 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/brs5f.c [2020-08-22 22:59:40,365 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6221e0558/89714382388641a8bd144e9033345ee6/FLAG1092c2ddb [2020-08-22 22:59:40,716 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6221e0558/89714382388641a8bd144e9033345ee6 [2020-08-22 22:59:40,728 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 22:59:40,730 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 22:59:40,731 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:40,731 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 22:59:40,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 22:59:40,736 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:40" (1/1) ... [2020-08-22 22:59:40,740 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d4c78ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:40, skipping insertion in model container [2020-08-22 22:59:40,740 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 10:59:40" (1/1) ... [2020-08-22 22:59:40,748 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 22:59:40,767 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 22:59:40,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:40,961 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 22:59:40,984 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 22:59:41,002 INFO L208 MainTranslator]: Completed translation [2020-08-22 22:59:41,003 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41 WrapperNode [2020-08-22 22:59:41,003 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 22:59:41,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 22:59:41,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 22:59:41,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 22:59:41,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (1/1) ... [2020-08-22 22:59:41,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (1/1) ... [2020-08-22 22:59:41,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (1/1) ... [2020-08-22 22:59:41,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (1/1) ... [2020-08-22 22:59:41,138 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (1/1) ... [2020-08-22 22:59:41,145 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (1/1) ... [2020-08-22 22:59:41,152 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (1/1) ... [2020-08-22 22:59:41,154 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 22:59:41,155 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 22:59:41,155 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 22:59:41,155 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 22:59:41,157 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (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 [2020-08-22 22:59:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 22:59:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 22:59:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 22:59:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 22:59:41,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 22:59:41,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 22:59:41,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 22:59:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 22:59:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 22:59:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 22:59:41,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 22:59:41,578 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 22:59:41,578 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 22:59:41,585 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:41 BoogieIcfgContainer [2020-08-22 22:59:41,585 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 22:59:41,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 22:59:41,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 22:59:41,592 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 22:59:41,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 10:59:40" (1/3) ... [2020-08-22 22:59:41,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5318ad87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:41, skipping insertion in model container [2020-08-22 22:59:41,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 10:59:41" (2/3) ... [2020-08-22 22:59:41,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5318ad87 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 10:59:41, skipping insertion in model container [2020-08-22 22:59:41,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 10:59:41" (3/3) ... [2020-08-22 22:59:41,599 INFO L109 eAbstractionObserver]: Analyzing ICFG brs5f.c [2020-08-22 22:59:41,608 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 22:59:41,614 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 22:59:41,625 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 22:59:41,645 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 22:59:41,645 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 22:59:41,646 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 22:59:41,646 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 22:59:41,646 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 22:59:41,646 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 22:59:41,646 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 22:59:41,646 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 22:59:41,663 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states. [2020-08-22 22:59:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 22:59:41,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:41,676 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] [2020-08-22 22:59:41,676 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:41,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:41,682 INFO L82 PathProgramCache]: Analyzing trace with hash 221259408, now seen corresponding path program 1 times [2020-08-22 22:59:41,688 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:41,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266233987] [2020-08-22 22:59:41,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:41,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:41,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:41,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:41,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:41,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266233987] [2020-08-22 22:59:41,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:41,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 22:59:41,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131218784] [2020-08-22 22:59:41,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 22:59:41,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:41,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 22:59:41,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 22:59:41,931 INFO L87 Difference]: Start difference. First operand 59 states. Second operand 3 states. [2020-08-22 22:59:42,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:42,121 INFO L93 Difference]: Finished difference Result 101 states and 116 transitions. [2020-08-22 22:59:42,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 22:59:42,123 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-22 22:59:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:42,134 INFO L225 Difference]: With dead ends: 101 [2020-08-22 22:59:42,134 INFO L226 Difference]: Without dead ends: 47 [2020-08-22 22:59:42,139 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 [2020-08-22 22:59:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-08-22 22:59:42,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-08-22 22:59:42,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-08-22 22:59:42,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-08-22 22:59:42,187 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 30 [2020-08-22 22:59:42,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:42,187 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-08-22 22:59:42,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 22:59:42,188 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-08-22 22:59:42,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 22:59:42,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:42,189 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] [2020-08-22 22:59:42,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 22:59:42,190 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:42,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:42,191 INFO L82 PathProgramCache]: Analyzing trace with hash -151091841, now seen corresponding path program 1 times [2020-08-22 22:59:42,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:42,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250398016] [2020-08-22 22:59:42,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:42,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:42,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 22:59:42,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:42,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 22:59:42,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 22:59:42,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 22:59:42,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250398016] [2020-08-22 22:59:42,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 22:59:42,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 22:59:42,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403592355] [2020-08-22 22:59:42,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 22:59:42,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 22:59:42,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 22:59:42,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 22:59:42,318 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 5 states. [2020-08-22 22:59:42,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 22:59:42,501 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2020-08-22 22:59:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 22:59:42,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 30 [2020-08-22 22:59:42,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 22:59:42,504 INFO L225 Difference]: With dead ends: 81 [2020-08-22 22:59:42,504 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 22:59:42,506 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 [2020-08-22 22:59:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 22:59:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 51. [2020-08-22 22:59:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 22:59:42,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-22 22:59:42,522 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 30 [2020-08-22 22:59:42,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 22:59:42,522 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-22 22:59:42,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 22:59:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-22 22:59:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 22:59:42,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 22:59:42,525 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] [2020-08-22 22:59:42,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 22:59:42,525 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 22:59:42,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 22:59:42,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1707000309, now seen corresponding path program 1 times [2020-08-22 22:59:42,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 22:59:42,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1411357826] [2020-08-22 22:59:42,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 22:59:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:59:42,568 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:59:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 22:59:42,628 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 22:59:42,680 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 22:59:42,681 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 22:59:42,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 22:59:42,729 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 10:59:42 BoogieIcfgContainer [2020-08-22 22:59:42,729 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 22:59:42,732 INFO L168 Benchmark]: Toolchain (without parser) took 2001.55 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 202.5 MB in the end (delta: -98.5 MB). Peak memory consumption was 82.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:42,733 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 22:59:42,734 INFO L168 Benchmark]: CACSL2BoogieTranslator took 272.05 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:42,735 INFO L168 Benchmark]: Boogie Preprocessor took 150.98 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 93.3 MB in the beginning and 182.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:42,736 INFO L168 Benchmark]: RCFGBuilder took 430.44 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 163.6 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:42,737 INFO L168 Benchmark]: TraceAbstraction took 1140.16 ms. Allocated memory was 205.0 MB in the beginning and 234.4 MB in the end (delta: 29.4 MB). Free memory was 163.6 MB in the beginning and 202.5 MB in the end (delta: -39.0 MB). Peak memory consumption was 77.5 MB. Max. memory is 7.1 GB. [2020-08-22 22:59:42,742 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 272.05 ms. Allocated memory is still 140.5 MB. Free memory was 103.8 MB in the beginning and 93.3 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 150.98 ms. Allocated memory was 140.5 MB in the beginning and 205.0 MB in the end (delta: 64.5 MB). Free memory was 93.3 MB in the beginning and 182.5 MB in the end (delta: -89.2 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 430.44 ms. Allocated memory is still 205.0 MB. Free memory was 182.5 MB in the beginning and 163.6 MB in the end (delta: 18.9 MB). Peak memory consumption was 18.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1140.16 ms. Allocated memory was 205.0 MB in the beginning and 234.4 MB in the end (delta: 29.4 MB). Free memory was 163.6 MB in the beginning and 202.5 MB in the end (delta: -39.0 MB). Peak memory consumption was 77.5 MB. 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; VAL [\old(N)=10, N=0] [L21] N = __VERIFIER_nondet_int() VAL [\old(N)=0, __VERIFIER_nondet_int()=1, N=1] [L22] COND FALSE !(N <= 0) VAL [\old(N)=0, N=1] [L23] CALL assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(cond)=1, \old(N)=0, N=1] [L11] COND FALSE !(!cond) VAL [\old(cond)=1, \old(N)=0, cond=1, N=1] [L23] RET assume_abort_if_not(N <= 2147483647/sizeof(int)) VAL [\old(N)=0, N=1] [L25] int i; VAL [\old(N)=0, N=1] [L26] long long sum[1]; VAL [\old(N)=0, N=1, sum={2:0}] [L27] int *a = malloc(sizeof(int)*N); VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L29] COND TRUE i