/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 0.1.25-3af5e1f [2020-09-04 17:45:09,091 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 17:45:09,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 17:45:09,127 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 17:45:09,128 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 17:45:09,129 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 17:45:09,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 17:45:09,133 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 17:45:09,135 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 17:45:09,136 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 17:45:09,137 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 17:45:09,139 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 17:45:09,139 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 17:45:09,140 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 17:45:09,142 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 17:45:09,143 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 17:45:09,144 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 17:45:09,146 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 17:45:09,148 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 17:45:09,150 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 17:45:09,152 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 17:45:09,154 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 17:45:09,155 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 17:45:09,156 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 17:45:09,159 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 17:45:09,170 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 17:45:09,171 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 17:45:09,172 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 17:45:09,173 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 17:45:09,188 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 17:45:09,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 17:45:09,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 17:45:09,191 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 17:45:09,191 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 17:45:09,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 17:45:09,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 17:45:09,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 17:45:09,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 17:45:09,194 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 17:45:09,194 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 17:45:09,195 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 17:45:09,195 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 17:45:09,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 17:45:09,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 17:45:09,195 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 17:45:09,196 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 17:45:09,196 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 17:45:09,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 17:45:09,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 17:45:09,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 17:45:09,198 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 17:45:09,198 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-09-04 17:45:09,671 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 17:45:09,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 17:45:09,698 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 17:45:09,700 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 17:45:09,701 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 17:45:09,702 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum04-1.i [2020-09-04 17:45:09,811 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c36fcfe8/cccff1b779bf4532bc28c3fadb6da674/FLAG14560d0de [2020-09-04 17:45:10,390 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 17:45:10,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/sum04-1.i [2020-09-04 17:45:10,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c36fcfe8/cccff1b779bf4532bc28c3fadb6da674/FLAG14560d0de [2020-09-04 17:45:10,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c36fcfe8/cccff1b779bf4532bc28c3fadb6da674 [2020-09-04 17:45:10,740 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 17:45:10,742 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 17:45:10,743 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 17:45:10,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 17:45:10,748 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 17:45:10,749 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:45:10" (1/1) ... [2020-09-04 17:45:10,754 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@70996f09 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:10, skipping insertion in model container [2020-09-04 17:45:10,762 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 05:45:10" (1/1) ... [2020-09-04 17:45:10,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 17:45:10,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 17:45:11,028 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:45:11,034 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 17:45:11,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 17:45:11,065 INFO L208 MainTranslator]: Completed translation [2020-09-04 17:45:11,066 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11 WrapperNode [2020-09-04 17:45:11,066 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 17:45:11,067 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 17:45:11,067 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 17:45:11,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 17:45:11,081 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (1/1) ... [2020-09-04 17:45:11,081 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (1/1) ... [2020-09-04 17:45:11,087 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (1/1) ... [2020-09-04 17:45:11,087 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (1/1) ... [2020-09-04 17:45:11,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (1/1) ... [2020-09-04 17:45:11,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (1/1) ... [2020-09-04 17:45:11,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (1/1) ... [2020-09-04 17:45:11,175 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 17:45:11,176 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 17:45:11,176 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 17:45:11,176 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 17:45:11,179 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 17:45:11,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 17:45:11,259 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 17:45:11,259 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 17:45:11,260 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 17:45:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 17:45:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 17:45:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 17:45:11,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 17:45:11,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 17:45:11,479 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 17:45:11,480 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 17:45:11,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:45:11 BoogieIcfgContainer [2020-09-04 17:45:11,486 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 17:45:11,499 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 17:45:11,500 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 17:45:11,506 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 17:45:11,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 05:45:10" (1/3) ... [2020-09-04 17:45:11,508 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cea6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:45:11, skipping insertion in model container [2020-09-04 17:45:11,508 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 05:45:11" (2/3) ... [2020-09-04 17:45:11,509 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34cea6a4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 05:45:11, skipping insertion in model container [2020-09-04 17:45:11,509 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 05:45:11" (3/3) ... [2020-09-04 17:45:11,513 INFO L109 eAbstractionObserver]: Analyzing ICFG sum04-1.i [2020-09-04 17:45:11,543 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 17:45:11,567 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 17:45:11,600 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 17:45:11,628 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 17:45:11,628 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 17:45:11,628 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-09-04 17:45:11,628 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 17:45:11,628 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 17:45:11,629 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 17:45:11,629 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 17:45:11,629 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 17:45:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-09-04 17:45:11,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 17:45:11,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:11,663 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:45:11,664 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:11,672 INFO L82 PathProgramCache]: Analyzing trace with hash -649727231, now seen corresponding path program 1 times [2020-09-04 17:45:11,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:11,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016584588] [2020-09-04 17:45:11,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:11,760 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:11,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:11,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:11,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:11,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:11,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016584588] [2020-09-04 17:45:11,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:11,841 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 17:45:11,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300110785] [2020-09-04 17:45:11,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 17:45:11,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 17:45:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 17:45:11,872 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 2 states. [2020-09-04 17:45:11,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:11,907 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2020-09-04 17:45:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 17:45:11,909 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 12 [2020-09-04 17:45:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:11,921 INFO L225 Difference]: With dead ends: 35 [2020-09-04 17:45:11,921 INFO L226 Difference]: Without dead ends: 18 [2020-09-04 17:45:11,926 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 [2020-09-04 17:45:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-04 17:45:11,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-09-04 17:45:11,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-09-04 17:45:11,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2020-09-04 17:45:11,975 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 12 [2020-09-04 17:45:11,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:11,976 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2020-09-04 17:45:11,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 17:45:11,976 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2020-09-04 17:45:11,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-04 17:45:11,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:11,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:45:11,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 17:45:11,978 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:11,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash -662656525, now seen corresponding path program 1 times [2020-09-04 17:45:11,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:11,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271607437] [2020-09-04 17:45:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:11,981 INFO L283 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-09-04 17:45:12,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:12,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:12,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:12,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:12,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271607437] [2020-09-04 17:45:12,046 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:12,046 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-04 17:45:12,046 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724976989] [2020-09-04 17:45:12,047 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-04 17:45:12,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:12,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-04 17:45:12,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-04 17:45:12,049 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand 3 states. [2020-09-04 17:45:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:45:12,101 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-09-04 17:45:12,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-04 17:45:12,102 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-09-04 17:45:12,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:45:12,103 INFO L225 Difference]: With dead ends: 34 [2020-09-04 17:45:12,103 INFO L226 Difference]: Without dead ends: 23 [2020-09-04 17:45:12,105 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 [2020-09-04 17:45:12,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-09-04 17:45:12,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2020-09-04 17:45:12,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-04 17:45:12,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-04 17:45:12,114 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 12 [2020-09-04 17:45:12,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:45:12,115 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-04 17:45:12,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-04 17:45:12,115 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-04 17:45:12,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-04 17:45:12,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:45:12,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:45:12,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 17:45:12,117 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:45:12,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:45:12,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1659803531, now seen corresponding path program 1 times [2020-09-04 17:45:12,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:45:12,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272809099] [2020-09-04 17:45:12,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:45:14,392 INFO L273 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-09-04 17:45:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:14,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 17:45:14,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 17:45:14,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 17:45:20,861 WARN L193 SmtUtils]: Spent 2.12 s on a formula simplification that was a NOOP. DAG size: 59 [2020-09-04 17:45:29,219 WARN L193 SmtUtils]: Spent 2.08 s on a formula simplification that was a NOOP. DAG size: 60 [2020-09-04 17:45:35,368 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 62 [2020-09-04 17:45:37,756 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 63 [2020-09-04 17:45:46,246 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 61 [2020-09-04 17:45:46,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272809099] [2020-09-04 17:45:46,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 17:45:46,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-09-04 17:45:46,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719911633] [2020-09-04 17:45:46,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-04 17:45:46,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 17:45:46,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-04 17:45:46,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=46, Unknown=9, NotChecked=0, Total=90 [2020-09-04 17:45:46,258 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 8 states. [2020-09-04 17:45:56,624 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification that was a NOOP. DAG size: 84 [2020-09-04 17:46:10,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 17:46:10,554 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-04 17:46:10,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-04 17:46:10,561 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 18 [2020-09-04 17:46:10,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 17:46:10,562 INFO L225 Difference]: With dead ends: 34 [2020-09-04 17:46:10,562 INFO L226 Difference]: Without dead ends: 29 [2020-09-04 17:46:10,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 42.0s TimeCoverageRelationStatistics Valid=43, Invalid=55, Unknown=12, NotChecked=0, Total=110 [2020-09-04 17:46:10,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-09-04 17:46:10,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2020-09-04 17:46:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-09-04 17:46:10,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-09-04 17:46:10,592 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 18 [2020-09-04 17:46:10,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 17:46:10,592 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-09-04 17:46:10,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-04 17:46:10,593 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-09-04 17:46:10,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-04 17:46:10,596 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 17:46:10,596 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 17:46:10,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 17:46:10,596 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 17:46:10,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 17:46:10,597 INFO L82 PathProgramCache]: Analyzing trace with hash -425824350, now seen corresponding path program 1 times [2020-09-04 17:46:10,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 17:46:10,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430698228] [2020-09-04 17:46:10,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 17:46:11,064 WARN L193 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 48 [2020-09-04 17:46:13,239 INFO L273 leratedInterpolation]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2020-09-04 17:46:13,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 17:46:13,242 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:329) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.generateMetaTrace(AcceleratedInterpolation.java:415) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:288) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-09-04 17:46:13,253 INFO L168 Benchmark]: Toolchain (without parser) took 62507.69 ms. Allocated memory was 139.5 MB in the beginning and 233.8 MB in the end (delta: 94.4 MB). Free memory was 104.0 MB in the beginning and 159.9 MB in the end (delta: -55.8 MB). Peak memory consumption was 38.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:13,255 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory is still 122.0 MB. There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 17:46:13,259 INFO L168 Benchmark]: CACSL2BoogieTranslator took 323.28 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:13,262 INFO L168 Benchmark]: Boogie Preprocessor took 108.89 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 94.4 MB in the beginning and 182.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:13,263 INFO L168 Benchmark]: RCFGBuilder took 309.63 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 170.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:13,267 INFO L168 Benchmark]: TraceAbstraction took 61747.79 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 169.5 MB in the beginning and 159.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 41.1 MB. Max. memory is 7.1 GB. [2020-09-04 17:46:13,275 INFO L336 ainManager$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 139.5 MB. Free memory is still 122.0 MB. There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 323.28 ms. Allocated memory is still 139.5 MB. Free memory was 103.8 MB in the beginning and 94.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.89 ms. Allocated memory was 139.5 MB in the beginning and 202.4 MB in the end (delta: 62.9 MB). Free memory was 94.4 MB in the beginning and 182.4 MB in the end (delta: -88.0 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 309.63 ms. Allocated memory is still 202.4 MB. Free memory was 182.4 MB in the beginning and 170.1 MB in the end (delta: 12.3 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 61747.79 ms. Allocated memory was 202.4 MB in the beginning and 233.8 MB in the end (delta: 31.5 MB). Free memory was 169.5 MB in the beginning and 159.9 MB in the end (delta: 9.6 MB). Peak memory consumption was 41.1 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...