/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/sum04-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:45:38,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:45:38,235 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:45:38,274 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:45:38,300 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:45:38,303 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:45:38,305 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:45:38,306 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:45:38,308 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:45:38,309 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:45:38,311 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:45:38,319 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:45:38,320 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:45:38,321 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:45:38,323 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:45:38,324 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:45:38,328 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:45:38,337 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:45:38,338 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:45:38,340 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:45:38,341 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 19:45:38,355 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:45:38,356 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:45:38,357 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:45:38,358 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:45:38,358 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:45:38,358 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:45:38,358 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:45:38,358 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:45:38,358 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:45:38,359 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:45:38,360 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:45:38,360 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:45:38,360 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:45:38,360 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:45:38,361 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:45:38,361 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:45:38,361 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:45:38,362 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:45:38,362 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:45:38,362 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:45:38,362 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:45:38,362 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:45:38,363 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:45:38,625 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:45:38,635 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:45:38,641 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:45:38,642 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:45:38,643 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:45:38,644 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-08-22 19:45:38,722 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad3fea0b4/f6b01c75a7524034860710179676122c/FLAG97c8f21b5 [2020-08-22 19:45:39,198 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:45:39,199 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum04-1.i [2020-08-22 19:45:39,205 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad3fea0b4/f6b01c75a7524034860710179676122c/FLAG97c8f21b5 [2020-08-22 19:45:39,598 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ad3fea0b4/f6b01c75a7524034860710179676122c [2020-08-22 19:45:39,609 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:45:39,611 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:45:39,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:39,612 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:45:39,616 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:45:39,617 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,620 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 07:45:39, skipping insertion in model container [2020-08-22 19:45:39,620 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,629 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:45:39,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:45:39,818 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:39,822 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:45:39,838 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:45:39,853 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:45:39,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39 WrapperNode [2020-08-22 19:45:39,854 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:45:39,855 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:45:39,855 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:45:39,855 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:45:39,869 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,869 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,875 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,968 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,975 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (1/1) ... [2020-08-22 19:45:39,978 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:45:39,978 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:45:39,978 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:45:39,979 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:45:39,981 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (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 19:45:40,045 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:45:40,046 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:45:40,046 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:45:40,046 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:45:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:45:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:45:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:45:40,046 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:45:40,047 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:45:40,217 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:45:40,217 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:45:40,221 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:40 BoogieIcfgContainer [2020-08-22 19:45:40,222 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:45:40,223 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:45:40,223 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:45:40,226 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:45:40,227 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:45:39" (1/3) ... [2020-08-22 19:45:40,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76083d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:40, skipping insertion in model container [2020-08-22 19:45:40,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:45:39" (2/3) ... [2020-08-22 19:45:40,228 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@76083d17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:45:40, skipping insertion in model container [2020-08-22 19:45:40,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:45:40" (3/3) ... [2020-08-22 19:45:40,230 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-08-22 19:45:40,241 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:45:40,249 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:45:40,269 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:45:40,295 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:45:40,295 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:45:40,296 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:45:40,296 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:45:40,297 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:45:40,297 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:45:40,297 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:45:40,297 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:45:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-22 19:45:40,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 19:45:40,332 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:40,333 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:40,334 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:40,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:40,350 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-08-22 19:45:40,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:40,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1494502122] [2020-08-22 19:45:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:40,442 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:40,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:40,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:40,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:40,492 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 19:45:40,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1494502122] [2020-08-22 19:45:40,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:40,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:45:40,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115034482] [2020-08-22 19:45:40,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:45:40,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:40,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:45:40,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:45:40,515 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-08-22 19:45:40,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:40,536 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-08-22 19:45:40,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:45:40,538 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-08-22 19:45:40,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:40,546 INFO L225 Difference]: With dead ends: 35 [2020-08-22 19:45:40,546 INFO L226 Difference]: Without dead ends: 18 [2020-08-22 19:45:40,549 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 19:45:40,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-22 19:45:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-22 19:45:40,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-22 19:45:40,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-08-22 19:45:40,585 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-08-22 19:45:40,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:40,585 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-08-22 19:45:40,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:45:40,585 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-08-22 19:45:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 19:45:40,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:40,586 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:40,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:45:40,587 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:40,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:40,588 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-08-22 19:45:40,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:40,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864613283] [2020-08-22 19:45:40,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:40,590 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:45:40,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:40,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:40,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:40,644 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 19:45:40,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864613283] [2020-08-22 19:45:40,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:45:40,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 19:45:40,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103849561] [2020-08-22 19:45:40,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 19:45:40,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:45:40,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 19:45:40,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 19:45:40,647 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-08-22 19:45:40,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:45:40,684 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-08-22 19:45:40,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 19:45:40,685 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-08-22 19:45:40,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:45:40,687 INFO L225 Difference]: With dead ends: 34 [2020-08-22 19:45:40,687 INFO L226 Difference]: Without dead ends: 23 [2020-08-22 19:45:40,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 19:45:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-08-22 19:45:40,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-08-22 19:45:40,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-08-22 19:45:40,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-08-22 19:45:40,703 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-08-22 19:45:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:45:40,703 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-08-22 19:45:40,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 19:45:40,703 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-08-22 19:45:40,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 19:45:40,705 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:45:40,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:45:40,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:45:40,706 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:45:40,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:45:40,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-08-22 19:45:40,708 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:45:40,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2019930624] [2020-08-22 19:45:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:45:42,947 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 19:45:42,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:43,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:45:43,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:45:43,006 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 19:45:49,497 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 59 [2020-08-22 19:45:57,775 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 60 [2020-08-22 19:46:03,994 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 62 [2020-08-22 19:46:09,132 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 63 [2020-08-22 19:46:10,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2019930624] [2020-08-22 19:46:10,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:46:10,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 19:46:10,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350916631] [2020-08-22 19:46:10,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 19:46:10,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:46:10,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 19:46:10,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=38, Unknown=7, NotChecked=0, Total=72 [2020-08-22 19:46:10,388 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 7 states. [2020-08-22 19:46:21,614 WARN L193 SmtUtils]: Spent 4.07 s on a formula simplification that was a NOOP. DAG size: 84 [2020-08-22 19:46:34,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:46:34,121 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-08-22 19:46:34,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 19:46:34,123 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-08-22 19:46:34,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:46:34,124 INFO L225 Difference]: With dead ends: 34 [2020-08-22 19:46:34,124 INFO L226 Difference]: Without dead ends: 29 [2020-08-22 19:46:34,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 38.5s TimeCoverageRelationStatistics Valid=34, Invalid=46, Unknown=10, NotChecked=0, Total=90 [2020-08-22 19:46:34,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-22 19:46:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-08-22 19:46:34,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-22 19:46:34,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-08-22 19:46:34,150 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-08-22 19:46:34,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:46:34,151 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-08-22 19:46:34,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 19:46:34,152 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-08-22 19:46:34,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 19:46:34,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:46:34,154 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:46:34,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:46:34,155 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:46:34,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:46:34,155 INFO L82 PathProgramCache]: Analyzing trace with hash -425824350, now seen corresponding path program 1 times [2020-08-22 19:46:34,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:46:34,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904972765] [2020-08-22 19:46:34,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:46:34,528 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-08-22 19:46:36,675 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-08-22 19:46:36,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 19:46:36,680 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalArgumentException: must have same length at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.pairwiseEquality(SmtUtils.java:418) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.constructEpsilon(AcceleratedInterpolation.java:334) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:420) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:293) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.(AcceleratedInterpolation.java:207) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:144) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 19:46:36,688 INFO L168 Benchmark]: Toolchain (without parser) took 57075.28 ms. Allocated memory was 146.8 MB in the beginning and 232.8 MB in the end (delta: 86.0 MB). Free memory was 104.3 MB in the beginning and 159.8 MB in the end (delta: -55.5 MB). Peak memory consumption was 30.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:36,689 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-22 19:46:36,690 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.33 ms. Allocated memory is still 146.8 MB. Free memory was 104.1 MB in the beginning and 94.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:36,693 INFO L168 Benchmark]: Boogie Preprocessor took 123.08 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 94.2 MB in the beginning and 181.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:36,694 INFO L168 Benchmark]: RCFGBuilder took 243.54 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 170.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:36,703 INFO L168 Benchmark]: TraceAbstraction took 56460.97 ms. Allocated memory was 203.4 MB in the beginning and 232.8 MB in the end (delta: 29.4 MB). Free memory was 169.5 MB in the beginning and 161.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:46:36,712 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 122.4 MB in the beginning and 122.2 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 242.33 ms. Allocated memory is still 146.8 MB. Free memory was 104.1 MB in the beginning and 94.2 MB in the end (delta: 9.8 MB). Peak memory consumption was 9.8 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 123.08 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 94.2 MB in the beginning and 181.8 MB in the end (delta: -87.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 243.54 ms. Allocated memory is still 203.4 MB. Free memory was 181.8 MB in the beginning and 170.2 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 56460.97 ms. Allocated memory was 203.4 MB in the beginning and 232.8 MB in the end (delta: 29.4 MB). Free memory was 169.5 MB in the beginning and 161.2 MB in the end (delta: 8.4 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalArgumentException: must have same length de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalArgumentException: must have same length: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.SmtUtils.pairwiseEquality(SmtUtils.java:418) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...