/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/s42iff.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:00:36,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:00:36,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:00:36,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:00:36,722 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:00:36,724 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:00:36,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:00:36,726 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:00:36,728 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:00:36,729 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:00:36,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:00:36,733 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:00:36,734 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:00:36,736 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:00:36,737 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:00:36,738 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:00:36,741 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:00:36,750 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:00:36,751 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:00:36,752 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:00:36,753 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 23:00:36,763 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:00:36,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:00:36,765 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:00:36,765 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:00:36,766 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:00:36,766 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:00:36,766 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:00:36,766 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:00:36,767 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:00:36,767 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:00:36,767 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:00:36,767 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:00:36,767 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:00:36,768 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:00:36,768 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:00:36,768 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:00:36,768 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:00:36,769 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:00:36,769 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:00:36,769 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:00:36,769 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:00:36,769 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:00:36,770 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 23:00:37,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:00:37,146 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:00:37,150 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:00:37,152 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:00:37,153 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:00:37,153 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/s42iff.c [2020-08-22 23:00:37,226 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795989bb5/fbfb363063484690a61d406eee2f941d/FLAG76811996c [2020-08-22 23:00:37,689 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:00:37,690 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-fpi/s42iff.c [2020-08-22 23:00:37,699 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795989bb5/fbfb363063484690a61d406eee2f941d/FLAG76811996c [2020-08-22 23:00:38,044 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/795989bb5/fbfb363063484690a61d406eee2f941d [2020-08-22 23:00:38,055 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:00:38,057 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:00:38,058 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:38,058 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:00:38,062 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:00:38,063 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,066 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@358d781b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38, skipping insertion in model container [2020-08-22 23:00:38,066 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,074 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:00:38,096 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:00:38,397 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:38,414 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:00:38,457 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:00:38,581 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:00:38,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38 WrapperNode [2020-08-22 23:00:38,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:00:38,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:00:38,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:00:38,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:00:38,599 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,599 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,609 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,610 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,621 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,629 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (1/1) ... [2020-08-22 23:00:38,632 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:00:38,633 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:00:38,633 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:00:38,633 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:00:38,634 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (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 23:00:38,708 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:00:38,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:00:38,709 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:00:38,709 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:00:38,709 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:00:38,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:00:38,710 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:00:38,710 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:00:38,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:00:38,710 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:00:38,710 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 23:00:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:00:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:00:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 23:00:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:00:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:00:38,711 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:00:38,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:00:38,712 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:00:39,062 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:00:39,063 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 23:00:39,070 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:39 BoogieIcfgContainer [2020-08-22 23:00:39,071 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:00:39,072 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:00:39,072 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:00:39,076 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:00:39,076 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:00:38" (1/3) ... [2020-08-22 23:00:39,077 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350ba56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:39, skipping insertion in model container [2020-08-22 23:00:39,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:00:38" (2/3) ... [2020-08-22 23:00:39,078 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@350ba56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:00:39, skipping insertion in model container [2020-08-22 23:00:39,078 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:00:39" (3/3) ... [2020-08-22 23:00:39,082 INFO L109 eAbstractionObserver]: Analyzing ICFG s42iff.c [2020-08-22 23:00:39,094 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:00:39,103 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:00:39,135 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:00:39,180 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:00:39,180 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:00:39,180 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:00:39,180 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:00:39,181 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:00:39,181 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:00:39,181 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:00:39,181 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:00:39,201 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states. [2020-08-22 23:00:39,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:39,214 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:39,215 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] [2020-08-22 23:00:39,215 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:39,221 INFO L82 PathProgramCache]: Analyzing trace with hash 350973390, now seen corresponding path program 1 times [2020-08-22 23:00:39,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:39,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196326660] [2020-08-22 23:00:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:39,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:39,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:39,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:39,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:39,476 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 23:00:39,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196326660] [2020-08-22 23:00:39,480 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:39,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 23:00:39,481 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500839224] [2020-08-22 23:00:39,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 23:00:39,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:39,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 23:00:39,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 23:00:39,505 INFO L87 Difference]: Start difference. First operand 80 states. Second operand 3 states. [2020-08-22 23:00:39,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:39,760 INFO L93 Difference]: Finished difference Result 143 states and 162 transitions. [2020-08-22 23:00:39,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 23:00:39,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-08-22 23:00:39,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:39,772 INFO L225 Difference]: With dead ends: 143 [2020-08-22 23:00:39,772 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 23:00:39,777 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 23:00:39,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 23:00:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-08-22 23:00:39,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-08-22 23:00:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2020-08-22 23:00:39,830 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 33 [2020-08-22 23:00:39,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:39,830 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2020-08-22 23:00:39,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 23:00:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2020-08-22 23:00:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-08-22 23:00:39,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:39,833 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] [2020-08-22 23:00:39,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:00:39,834 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:39,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:39,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1688115303, now seen corresponding path program 1 times [2020-08-22 23:00:39,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:39,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865044503] [2020-08-22 23:00:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:39,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:00:39,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:39,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 23:00:39,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:00:39,959 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 23:00:39,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865044503] [2020-08-22 23:00:39,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:00:39,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:00:39,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573366568] [2020-08-22 23:00:39,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:00:39,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:00:39,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:00:39,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:00:39,965 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand 5 states. [2020-08-22 23:00:40,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:00:40,246 INFO L93 Difference]: Finished difference Result 142 states and 154 transitions. [2020-08-22 23:00:40,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:00:40,247 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-08-22 23:00:40,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:00:40,250 INFO L225 Difference]: With dead ends: 142 [2020-08-22 23:00:40,250 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 23:00:40,252 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 23:00:40,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 23:00:40,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 71. [2020-08-22 23:00:40,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 23:00:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2020-08-22 23:00:40,270 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 33 [2020-08-22 23:00:40,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:00:40,271 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2020-08-22 23:00:40,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:00:40,271 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2020-08-22 23:00:40,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 23:00:40,274 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:00:40,274 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, 1, 1, 1] [2020-08-22 23:00:40,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:00:40,274 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:00:40,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:00:40,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1790069826, now seen corresponding path program 1 times [2020-08-22 23:00:40,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:00:40,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581870808] [2020-08-22 23:00:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:00:40,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:00:40,328 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:00:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:00:40,383 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:00:40,452 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:00:40,453 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:00:40,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:00:40,528 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:00:40 BoogieIcfgContainer [2020-08-22 23:00:40,529 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:00:40,532 INFO L168 Benchmark]: Toolchain (without parser) took 2473.65 ms. Allocated memory was 145.8 MB in the beginning and 235.4 MB in the end (delta: 89.7 MB). Free memory was 102.5 MB in the beginning and 186.1 MB in the end (delta: -83.6 MB). Peak memory consumption was 6.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:40,533 INFO L168 Benchmark]: CDTParser took 0.84 ms. Allocated memory is still 145.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 23:00:40,534 INFO L168 Benchmark]: CACSL2BoogieTranslator took 524.35 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 102.1 MB in the beginning and 180.8 MB in the end (delta: -78.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:40,535 INFO L168 Benchmark]: Boogie Preprocessor took 49.47 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 178.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:40,536 INFO L168 Benchmark]: RCFGBuilder took 438.33 ms. Allocated memory is still 202.4 MB. Free memory was 178.5 MB in the beginning and 156.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:40,537 INFO L168 Benchmark]: TraceAbstraction took 1456.53 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 156.3 MB in the beginning and 186.1 MB in the end (delta: -29.8 MB). Peak memory consumption was 3.2 MB. Max. memory is 7.1 GB. [2020-08-22 23:00:40,543 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.84 ms. Allocated memory is still 145.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 524.35 ms. Allocated memory was 145.8 MB in the beginning and 202.4 MB in the end (delta: 56.6 MB). Free memory was 102.1 MB in the beginning and 180.8 MB in the end (delta: -78.8 MB). Peak memory consumption was 19.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.47 ms. Allocated memory is still 202.4 MB. Free memory was 180.8 MB in the beginning and 178.5 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 438.33 ms. Allocated memory is still 202.4 MB. Free memory was 178.5 MB in the beginning and 156.9 MB in the end (delta: 21.5 MB). Peak memory consumption was 21.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1456.53 ms. Allocated memory was 202.4 MB in the beginning and 235.4 MB in the end (delta: 33.0 MB). Free memory was 156.3 MB in the beginning and 186.1 MB in the end (delta: -29.8 MB). Peak memory consumption was 3.2 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] sum[0] = 1 VAL [\old(N)=0, a={-1:0}, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] i=0 VAL [\old(N)=0, a={-1:0}, i=0, malloc(sizeof(int)*N)={-1:0}, N=1, sum={2:0}] [L30] COND TRUE i