/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/loops/array-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:01:00,123 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:01:00,126 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:01:00,165 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 23:01:00,165 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 23:01:00,174 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 23:01:00,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 23:01:00,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 23:01:00,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 23:01:00,188 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 23:01:00,189 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 23:01:00,190 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 23:01:00,190 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:01:00,193 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:01:00,196 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:01:00,198 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:01:00,199 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:01:00,200 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:01:00,202 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:01:00,210 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:01:00,213 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:01:00,214 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:01:00,215 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:01:00,216 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:01:00,229 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:01:00,245 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:01:00,249 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:01:00,250 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:01:00,251 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 23:01:00,266 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:01:00,266 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:01:00,268 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:01:00,269 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:01:00,269 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:01:00,269 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:01:00,269 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:01:00,269 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:01:00,270 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:01:00,270 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:01:00,271 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:01:00,271 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:01:00,271 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:01:00,271 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:01:00,272 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:01:00,272 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:01:00,272 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:01:00,272 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:01:00,273 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:01:00,273 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:01:00,273 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:01:00,274 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:01:00,274 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 23:01:00,590 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:01:00,603 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:01:00,607 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:01:00,608 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:01:00,609 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:01:00,610 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/array-2.c [2020-08-22 23:01:00,686 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a518b2e94/e4c68eec6b5c4789b1bd46a4037d13b7/FLAG981ffc887 [2020-08-22 23:01:01,181 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:01:01,182 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/array-2.c [2020-08-22 23:01:01,189 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a518b2e94/e4c68eec6b5c4789b1bd46a4037d13b7/FLAG981ffc887 [2020-08-22 23:01:01,541 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a518b2e94/e4c68eec6b5c4789b1bd46a4037d13b7 [2020-08-22 23:01:01,551 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:01:01,553 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:01:01,554 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:01,554 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:01:01,558 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:01:01,559 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:01,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@373efb0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01, skipping insertion in model container [2020-08-22 23:01:01,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:01,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:01:01,591 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:01:01,836 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:01,841 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:01:01,874 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:01:01,900 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:01:01,901 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01 WrapperNode [2020-08-22 23:01:01,901 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:01:01,902 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:01:01,902 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:01:01,902 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:01:02,006 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:02,007 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:02,016 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:02,017 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:02,029 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:02,035 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:02,036 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (1/1) ... [2020-08-22 23:01:02,039 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:01:02,040 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:01:02,040 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:01:02,040 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:01:02,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (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 23:01:02,109 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:01:02,110 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:01:02,110 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:01:02,110 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:01:02,110 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:01:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:01:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:01:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:01:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 23:01:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 23:01:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 23:01:02,111 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 23:01:02,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:01:02,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:01:02,409 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:01:02,410 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:01:02,414 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:02 BoogieIcfgContainer [2020-08-22 23:01:02,415 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:01:02,432 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:01:02,432 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:01:02,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:01:02,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:01:01" (1/3) ... [2020-08-22 23:01:02,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44af5613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:02, skipping insertion in model container [2020-08-22 23:01:02,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:01:01" (2/3) ... [2020-08-22 23:01:02,442 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44af5613 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:01:02, skipping insertion in model container [2020-08-22 23:01:02,442 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:01:02" (3/3) ... [2020-08-22 23:01:02,444 INFO L109 eAbstractionObserver]: Analyzing ICFG array-2.c [2020-08-22 23:01:02,456 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:01:02,463 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:01:02,479 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:01:02,504 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:01:02,504 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:01:02,504 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:01:02,505 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:01:02,505 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:01:02,505 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:01:02,505 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:01:02,505 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:01:02,524 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-08-22 23:01:02,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 23:01:02,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:02,537 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] [2020-08-22 23:01:02,537 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:02,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:02,542 INFO L82 PathProgramCache]: Analyzing trace with hash 683487989, now seen corresponding path program 1 times [2020-08-22 23:01:02,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:02,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576258810] [2020-08-22 23:01:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:02,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:02,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:02,917 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 23:01:02,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576258810] [2020-08-22 23:01:02,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:01:02,921 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 23:01:02,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707536877] [2020-08-22 23:01:02,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 23:01:02,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:02,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 23:01:02,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 23:01:02,941 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 5 states. [2020-08-22 23:01:03,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:03,187 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-08-22 23:01:03,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 23:01:03,189 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-22 23:01:03,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:03,201 INFO L225 Difference]: With dead ends: 75 [2020-08-22 23:01:03,201 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 23:01:03,205 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:01:03,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 23:01:03,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 37. [2020-08-22 23:01:03,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 23:01:03,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-08-22 23:01:03,261 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 22 [2020-08-22 23:01:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:03,261 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-08-22 23:01:03,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 23:01:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-08-22 23:01:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 23:01:03,266 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:03,266 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:01:03,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:01:03,267 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:03,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:03,268 INFO L82 PathProgramCache]: Analyzing trace with hash 403649603, now seen corresponding path program 1 times [2020-08-22 23:01:03,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:03,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165648052] [2020-08-22 23:01:03,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:03,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:03,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:01:03,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:01:03,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:01:03,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165648052] [2020-08-22 23:01:03,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:01:03,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 23:01:03,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32748653] [2020-08-22 23:01:03,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 23:01:03,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:01:03,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 23:01:03,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 23:01:03,783 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 11 states. [2020-08-22 23:01:04,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:01:04,222 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-08-22 23:01:04,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 23:01:04,223 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-22 23:01:04,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:01:04,225 INFO L225 Difference]: With dead ends: 49 [2020-08-22 23:01:04,225 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 23:01:04,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-08-22 23:01:04,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 23:01:04,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 40. [2020-08-22 23:01:04,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-22 23:01:04,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2020-08-22 23:01:04,242 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 32 [2020-08-22 23:01:04,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:01:04,243 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2020-08-22 23:01:04,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 23:01:04,243 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2020-08-22 23:01:04,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-08-22 23:01:04,245 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:01:04,245 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] [2020-08-22 23:01:04,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:01:04,246 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:01:04,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:01:04,246 INFO L82 PathProgramCache]: Analyzing trace with hash -913737726, now seen corresponding path program 1 times [2020-08-22 23:01:04,246 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:01:04,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292541713] [2020-08-22 23:01:04,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:01:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:01:04,273 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:01:04,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 23:01:04,297 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 23:01:04,337 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 23:01:04,338 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 23:01:04,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:01:04,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:01:04 BoogieIcfgContainer [2020-08-22 23:01:04,409 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:01:04,412 INFO L168 Benchmark]: Toolchain (without parser) took 2858.36 ms. Allocated memory was 140.0 MB in the beginning and 233.8 MB in the end (delta: 93.8 MB). Free memory was 104.0 MB in the beginning and 139.3 MB in the end (delta: -35.3 MB). Peak memory consumption was 58.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:04,414 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 23:01:04,416 INFO L168 Benchmark]: CACSL2BoogieTranslator took 348.08 ms. Allocated memory is still 140.0 MB. Free memory was 103.8 MB in the beginning and 93.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:04,418 INFO L168 Benchmark]: Boogie Preprocessor took 137.09 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.8 MB in the beginning and 181.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:04,420 INFO L168 Benchmark]: RCFGBuilder took 375.11 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 165.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:04,422 INFO L168 Benchmark]: TraceAbstraction took 1976.75 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 164.5 MB in the beginning and 139.3 MB in the end (delta: 25.1 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:01:04,433 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 140.0 MB. Free memory was 122.5 MB in the beginning and 122.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 348.08 ms. Allocated memory is still 140.0 MB. Free memory was 103.8 MB in the beginning and 93.8 MB in the end (delta: 10.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 137.09 ms. Allocated memory was 140.0 MB in the beginning and 203.4 MB in the end (delta: 63.4 MB). Free memory was 93.8 MB in the beginning and 181.5 MB in the end (delta: -87.7 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 375.11 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 165.1 MB in the end (delta: 15.7 MB). Peak memory consumption was 15.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1976.75 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 164.5 MB in the beginning and 139.3 MB in the end (delta: 25.1 MB). Peak memory consumption was 55.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 5]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L13] unsigned int SIZE=1; VAL [SIZE=1] [L14] unsigned int j,k; VAL [SIZE=1] [L15] int array[SIZE], menor; VAL [array={2:0}, SIZE=1] [L17] menor = __VERIFIER_nondet_int() VAL [__VERIFIER_nondet_int()=0, array={2:0}, menor=0, SIZE=1] [L19] j=0 VAL [array={2:0}, j=0, menor=0, SIZE=1] [L19] COND TRUE jmenor) VAL [\old(cond)=0] [L4] COND TRUE !(cond) VAL [\old(cond)=0, cond=0] [L5] __VERIFIER_error() VAL [\old(cond)=0, cond=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 46 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.8s, OverallIterations: 3, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 67 SDtfs, 134 SDslu, 155 SDs, 0 SdLazy, 208 SolverSat, 7 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 15 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 89 NumberOfCodeBlocks, 89 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 52 ConstructedInterpolants, 0 QuantifiedInterpolants, 10885 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 1 PerfectInterpolantSequences, 0/1 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...