/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:45:36,883 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:45:36,886 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:45:36,925 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:45:36,947 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:45:36,950 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:45:36,952 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:45:36,954 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:45:36,955 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:45:36,956 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:45:36,957 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:45:36,964 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:45:36,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:45:36,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:45:36,967 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:45:36,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:45:36,981 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:45:37,003 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 19:45:37,014 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:45:37,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:45:37,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:45:37,017 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:45:37,018 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:45:37,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:45:37,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:45:37,018 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:45:37,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:45:37,019 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:45:37,020 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:45:37,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:45:37,020 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:45:37,020 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:45:37,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:45:37,021 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:45:37,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:45:37,021 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:45:37,021 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:45:37,022 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:45:37,022 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:45:37,022 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:45:37,023 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:45:37,308 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:45:37,321 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:45:37,324 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:45:37,326 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:45:37,326 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:45:37,327 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-08-22 19:45:37,402 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286e3dc79/2516372e3272483784ded29b7d58245b/FLAG5b3c0f890 [2020-08-22 19:45:37,811 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:45:37,812 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01_bug02_sum01_bug02_base.case.i [2020-08-22 19:45:37,818 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286e3dc79/2516372e3272483784ded29b7d58245b/FLAG5b3c0f890 [2020-08-22 19:45:38,259 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/286e3dc79/2516372e3272483784ded29b7d58245b [2020-08-22 19:45:38,270 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:45:38,272 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:45:38,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:38,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:45:38,279 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:45:38,280 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,285 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@777de496 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38, skipping insertion in model container [2020-08-22 19:45:38,285 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,294 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:45:38,311 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:45:38,480 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:38,484 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:45:38,501 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:38,517 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:45:38,517 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38 WrapperNode [2020-08-22 19:45:38,517 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:38,518 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:45:38,518 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:45:38,519 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:45:38,532 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,533 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,538 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,538 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,659 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,664 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,665 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (1/1) ... [2020-08-22 19:45:38,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:45:38,667 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:45:38,667 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:45:38,667 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:45:38,668 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (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 19:45:38,733 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:45:38,734 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:45:38,734 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:45:38,734 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:45:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:45:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:45:38,734 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 19:45:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:45:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:45:38,735 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:45:38,906 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:45:38,906 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:45:38,910 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:38 BoogieIcfgContainer [2020-08-22 19:45:38,911 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:45:38,912 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:45:38,912 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:45:38,915 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:45:38,916 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:45:38" (1/3) ... [2020-08-22 19:45:38,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e8ada0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:38, skipping insertion in model container [2020-08-22 19:45:38,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:38" (2/3) ... [2020-08-22 19:45:38,917 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38e8ada0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:38, skipping insertion in model container [2020-08-22 19:45:38,917 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:38" (3/3) ... [2020-08-22 19:45:38,919 INFO L109 eAbstractionObserver]: Analyzing ICFG sum01_bug02_sum01_bug02_base.case.i [2020-08-22 19:45:38,931 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:45:38,938 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:45:38,952 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:45:38,972 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:45:38,972 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:45:38,972 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:45:38,972 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:45:38,972 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:45:38,972 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:45:38,973 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:45:38,973 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:45:38,985 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states. [2020-08-22 19:45:38,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 19:45:38,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:38,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:38,995 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:39,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:39,001 INFO L82 PathProgramCache]: Analyzing trace with hash -290415040, now seen corresponding path program 1 times [2020-08-22 19:45:39,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:39,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359411824] [2020-08-22 19:45:39,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:39,070 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,150 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 19:45:39,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359411824] [2020-08-22 19:45:39,154 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:39,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:45:39,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035018687] [2020-08-22 19:45:39,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:45:39,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:39,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:45:39,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:45:39,178 INFO L87 Difference]: Start difference. First operand 27 states. Second operand 2 states. [2020-08-22 19:45:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:39,204 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2020-08-22 19:45:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:45:39,206 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-08-22 19:45:39,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:39,215 INFO L225 Difference]: With dead ends: 38 [2020-08-22 19:45:39,215 INFO L226 Difference]: Without dead ends: 21 [2020-08-22 19:45:39,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:45:39,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-08-22 19:45:39,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-08-22 19:45:39,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-22 19:45:39,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-08-22 19:45:39,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 14 [2020-08-22 19:45:39,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:39,256 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-08-22 19:45:39,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:45:39,257 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-08-22 19:45:39,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 19:45:39,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:39,258 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:39,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:45:39,258 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:39,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:39,259 INFO L82 PathProgramCache]: Analyzing trace with hash -304267855, now seen corresponding path program 1 times [2020-08-22 19:45:39,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:39,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1495559730] [2020-08-22 19:45:39,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:39,262 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:39,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:39,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,352 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 19:45:39,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1495559730] [2020-08-22 19:45:39,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:39,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:45:39,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92710035] [2020-08-22 19:45:39,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:45:39,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:39,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:45:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:45:39,356 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-08-22 19:45:39,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:39,405 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-08-22 19:45:39,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:45:39,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-08-22 19:45:39,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:39,408 INFO L225 Difference]: With dead ends: 28 [2020-08-22 19:45:39,408 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 19:45:39,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:45:39,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 19:45:39,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-08-22 19:45:39,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-22 19:45:39,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-08-22 19:45:39,418 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 14 [2020-08-22 19:45:39,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:39,419 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-08-22 19:45:39,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:45:39,419 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-08-22 19:45:39,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 19:45:39,420 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:39,421 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] [2020-08-22 19:45:39,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:45:39,421 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:39,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:39,422 INFO L82 PathProgramCache]: Analyzing trace with hash -887516915, now seen corresponding path program 1 times [2020-08-22 19:45:39,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:39,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773313026] [2020-08-22 19:45:39,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:39,449 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:39,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:39,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:39,860 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 19:45:39,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773313026] [2020-08-22 19:45:39,861 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:39,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 19:45:39,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679823869] [2020-08-22 19:45:39,862 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 19:45:39,862 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:39,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 19:45:39,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-08-22 19:45:39,863 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 11 states. [2020-08-22 19:45:40,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:40,136 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-08-22 19:45:40,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 19:45:40,136 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 20 [2020-08-22 19:45:40,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:40,138 INFO L225 Difference]: With dead ends: 35 [2020-08-22 19:45:40,138 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 19:45:40,139 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-08-22 19:45:40,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 19:45:40,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-08-22 19:45:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 19:45:40,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2020-08-22 19:45:40,148 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 20 [2020-08-22 19:45:40,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:40,148 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2020-08-22 19:45:40,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 19:45:40,149 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2020-08-22 19:45:40,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 19:45:40,150 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:40,150 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] [2020-08-22 19:45:40,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:45:40,150 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:40,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:40,151 INFO L82 PathProgramCache]: Analyzing trace with hash -507920327, now seen corresponding path program 1 times [2020-08-22 19:45:40,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:40,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1944161884] [2020-08-22 19:45:40,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:40,223 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 19:45:40,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:45:40,239 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:45:40,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 19:45:40,266 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-08-22 19:45:40,297 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-08-22 19:45:40,297 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-08-22 19:45:40,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:45:40,319 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:45:40 BoogieIcfgContainer [2020-08-22 19:45:40,319 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:45:40,324 INFO L168 Benchmark]: Toolchain (without parser) took 2049.99 ms. Allocated memory was 138.9 MB in the beginning and 233.3 MB in the end (delta: 94.4 MB). Free memory was 101.5 MB in the beginning and 184.3 MB in the end (delta: -82.8 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:40,326 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 19:45:40,328 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.31 ms. Allocated memory is still 138.9 MB. Free memory was 101.3 MB in the beginning and 92.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:40,330 INFO L168 Benchmark]: Boogie Preprocessor took 148.63 ms. Allocated memory was 138.9 MB in the beginning and 205.0 MB in the end (delta: 66.1 MB). Free memory was 92.0 MB in the beginning and 184.0 MB in the end (delta: -92.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:40,332 INFO L168 Benchmark]: RCFGBuilder took 243.63 ms. Allocated memory is still 205.0 MB. Free memory was 184.0 MB in the beginning and 171.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:40,339 INFO L168 Benchmark]: TraceAbstraction took 1407.67 ms. Allocated memory was 205.0 MB in the beginning and 233.3 MB in the end (delta: 28.3 MB). Free memory was 170.9 MB in the beginning and 184.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 14.9 MB. Max. memory is 7.1 GB. [2020-08-22 19:45:40,343 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 138.9 MB. Free memory is still 120.1 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.31 ms. Allocated memory is still 138.9 MB. Free memory was 101.3 MB in the beginning and 92.0 MB in the end (delta: 9.3 MB). Peak memory consumption was 9.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 148.63 ms. Allocated memory was 138.9 MB in the beginning and 205.0 MB in the end (delta: 66.1 MB). Free memory was 92.0 MB in the beginning and 184.0 MB in the end (delta: -92.1 MB). Peak memory consumption was 14.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 243.63 ms. Allocated memory is still 205.0 MB. Free memory was 184.0 MB in the beginning and 171.5 MB in the end (delta: 12.5 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1407.67 ms. Allocated memory was 205.0 MB in the beginning and 233.3 MB in the end (delta: 28.3 MB). Free memory was 170.9 MB in the beginning and 184.3 MB in the end (delta: -13.4 MB). Peak memory consumption was 14.9 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: [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L12] int i, n=__VERIFIER_nondet_uint(), sn=0; [L13] i=1 [L13] COND TRUE i<=n [L14] sn = sn + (2) [L15] COND TRUE i==4 [L15] sn=-10 [L13] i++ [L13] COND FALSE !(i<=n) [L17] CALL __VERIFIER_assert(sn==n*(2) || sn == 0) [L4] COND TRUE !(cond) [L5] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.3s, OverallIterations: 4, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 62 SDtfs, 10 SDslu, 139 SDs, 0 SdLazy, 114 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=3, 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, 3 MinimizatonAttempts, 3 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, 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...