/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/loop-invgen/nest-if3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-86f66a4 [2020-07-07 14:01:05,554 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-07 14:01:05,556 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-07 14:01:05,576 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-07 14:01:05,577 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-07 14:01:05,579 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-07 14:01:05,581 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-07 14:01:05,593 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-07 14:01:05,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-07 14:01:05,599 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-07 14:01:05,600 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-07 14:01:05,604 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-07 14:01:05,605 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-07 14:01:05,607 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-07 14:01:05,610 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-07 14:01:05,611 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-07 14:01:05,612 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-07 14:01:05,612 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-07 14:01:05,614 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-07 14:01:05,615 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-07 14:01:05,617 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-07 14:01:05,617 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-07 14:01:05,618 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-07 14:01:05,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-07 14:01:05,621 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-07 14:01:05,629 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-07 14:01:05,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-07 14:01:05,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-07 14:01:05,632 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-07 14:01:05,641 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-07 14:01:05,642 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-07 14:01:05,643 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-07 14:01:05,643 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-07 14:01:05,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-07 14:01:05,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-07 14:01:05,644 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-07 14:01:05,644 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-07 14:01:05,644 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-07 14:01:05,644 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-07 14:01:05,645 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-07 14:01:05,645 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-07 14:01:05,645 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-07 14:01:05,645 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-07 14:01:05,645 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-07 14:01:05,646 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-07 14:01:05,646 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-07 14:01:05,646 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-07 14:01:05,646 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-07 14:01:05,646 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-07 14:01:05,647 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-07 14:01:05,647 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-07 14:01:05,647 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-07-07 14:01:05,991 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-07 14:01:06,010 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-07 14:01:06,014 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-07 14:01:06,016 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-07 14:01:06,017 INFO L275 PluginConnector]: CDTParser initialized [2020-07-07 14:01:06,017 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nest-if3.i [2020-07-07 14:01:06,084 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6feee89bd/9e4480254fad4e349555b9114e851296/FLAGe1cf92c5a [2020-07-07 14:01:06,501 INFO L306 CDTParser]: Found 1 translation units. [2020-07-07 14:01:06,502 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nest-if3.i [2020-07-07 14:01:06,509 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6feee89bd/9e4480254fad4e349555b9114e851296/FLAGe1cf92c5a [2020-07-07 14:01:06,897 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6feee89bd/9e4480254fad4e349555b9114e851296 [2020-07-07 14:01:06,906 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-07 14:01:06,908 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-07 14:01:06,909 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:06,909 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-07 14:01:06,913 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-07 14:01:06,914 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:06" (1/1) ... [2020-07-07 14:01:06,917 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@579d2d59 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:06, skipping insertion in model container [2020-07-07 14:01:06,917 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.07 02:01:06" (1/1) ... [2020-07-07 14:01:06,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-07 14:01:06,943 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-07 14:01:07,116 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:07,121 INFO L203 MainTranslator]: Completed pre-run [2020-07-07 14:01:07,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-07 14:01:07,154 INFO L208 MainTranslator]: Completed translation [2020-07-07 14:01:07,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07 WrapperNode [2020-07-07 14:01:07,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-07 14:01:07,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-07 14:01:07,156 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-07 14:01:07,156 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-07 14:01:07,168 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,172 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,173 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,176 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,183 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (1/1) ... [2020-07-07 14:01:07,263 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-07 14:01:07,264 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-07 14:01:07,264 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-07 14:01:07,264 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-07 14:01:07,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (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 [2020-07-07 14:01:07,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-07 14:01:07,335 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-07 14:01:07,335 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-07-07 14:01:07,335 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-07-07 14:01:07,336 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-07 14:01:07,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-07 14:01:07,336 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-07-07 14:01:07,336 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-07-07 14:01:07,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-07-07 14:01:07,336 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-07 14:01:07,336 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-07 14:01:07,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-07 14:01:07,337 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-07 14:01:07,584 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-07 14:01:07,584 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-07-07 14:01:07,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:07 BoogieIcfgContainer [2020-07-07 14:01:07,589 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-07 14:01:07,590 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-07 14:01:07,590 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-07 14:01:07,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-07 14:01:07,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.07 02:01:06" (1/3) ... [2020-07-07 14:01:07,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa48c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:07, skipping insertion in model container [2020-07-07 14:01:07,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.07 02:01:07" (2/3) ... [2020-07-07 14:01:07,595 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fa48c85 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.07 02:01:07, skipping insertion in model container [2020-07-07 14:01:07,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.07 02:01:07" (3/3) ... [2020-07-07 14:01:07,598 INFO L109 eAbstractionObserver]: Analyzing ICFG nest-if3.i [2020-07-07 14:01:07,612 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-07 14:01:07,621 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-07 14:01:07,639 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-07 14:01:07,665 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-07 14:01:07,666 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-07 14:01:07,666 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-07-07 14:01:07,666 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-07 14:01:07,666 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-07 14:01:07,667 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-07 14:01:07,667 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-07 14:01:07,667 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-07 14:01:07,684 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-07-07 14:01:07,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-07-07 14:01:07,695 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:07,697 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:07,697 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:07,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:07,709 INFO L82 PathProgramCache]: Analyzing trace with hash 781844856, now seen corresponding path program 1 times [2020-07-07 14:01:07,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:07,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625458046] [2020-07-07 14:01:07,725 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:08,025 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:08,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625458046] [2020-07-07 14:01:08,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:08,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-07 14:01:08,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304752093] [2020-07-07 14:01:08,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-07 14:01:08,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:08,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-07 14:01:08,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-07-07 14:01:08,049 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 6 states. [2020-07-07 14:01:08,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:08,213 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-07-07 14:01:08,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-07 14:01:08,215 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-07-07 14:01:08,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:08,225 INFO L225 Difference]: With dead ends: 93 [2020-07-07 14:01:08,226 INFO L226 Difference]: Without dead ends: 57 [2020-07-07 14:01:08,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:01:08,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-07-07 14:01:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-07-07 14:01:08,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-07-07 14:01:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-07-07 14:01:08,286 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2020-07-07 14:01:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:08,287 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-07-07 14:01:08,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-07 14:01:08,287 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-07-07 14:01:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-07-07 14:01:08,289 INFO L414 BasicCegarLoop]: Found error trace [2020-07-07 14:01:08,289 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-07 14:01:08,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-07 14:01:08,290 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-07 14:01:08,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-07 14:01:08,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1778608888, now seen corresponding path program 1 times [2020-07-07 14:01:08,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-07 14:01:08,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764467193] [2020-07-07 14:01:08,292 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-07 14:01:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-07 14:01:08,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-07 14:01:08,469 INFO L185 leratedInterpolation]: Finished Analysing Program using PRECISE loop Acceleration [2020-07-07 14:01:08,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764467193] [2020-07-07 14:01:08,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-07 14:01:08,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-07-07 14:01:08,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [155042309] [2020-07-07 14:01:08,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-07 14:01:08,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-07 14:01:08,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-07 14:01:08,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-07-07 14:01:08,472 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 8 states. [2020-07-07 14:01:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-07 14:01:08,637 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-07-07 14:01:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-07 14:01:08,638 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-07-07 14:01:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-07 14:01:08,639 INFO L225 Difference]: With dead ends: 59 [2020-07-07 14:01:08,639 INFO L226 Difference]: Without dead ends: 0 [2020-07-07 14:01:08,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-07-07 14:01:08,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-07-07 14:01:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-07-07 14:01:08,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-07-07 14:01:08,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-07-07 14:01:08,643 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-07-07 14:01:08,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-07 14:01:08,643 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-07-07 14:01:08,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-07 14:01:08,643 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-07-07 14:01:08,644 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-07-07 14:01:08,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-07 14:01:08,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-07-07 14:01:09,016 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:01:09,016 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:01:09,016 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-07-07 14:01:09,016 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-07-07 14:01:09,017 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-07-07 14:01:09,017 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-07-07 14:01:09,017 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:09,017 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:09,017 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-07-07 14:01:09,017 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-07-07 14:01:09,018 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-07-07 14:01:09,018 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 27) the Hoare annotation is: true [2020-07-07 14:01:09,018 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (<= 1 main_~l~0) [2020-07-07 14:01:09,018 INFO L264 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (<= 1 main_~l~0) [2020-07-07 14:01:09,018 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-07-07 14:01:09,019 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-07-07 14:01:09,019 INFO L271 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: true [2020-07-07 14:01:09,019 INFO L264 CegarLoopResult]: At program point L24(lines 24 25) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,019 INFO L264 CegarLoopResult]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,019 INFO L264 CegarLoopResult]: At program point L24-3(line 24) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,020 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (<= 1 main_~l~0) [2020-07-07 14:01:09,020 INFO L264 CegarLoopResult]: At program point L20-3(lines 20 26) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,020 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-07-07 14:01:09,020 INFO L264 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,020 INFO L271 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: true [2020-07-07 14:01:09,021 INFO L264 CegarLoopResult]: At program point L20-5(line 20) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,021 INFO L271 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: true [2020-07-07 14:01:09,021 INFO L264 CegarLoopResult]: At program point L20-6(lines 20 26) the Hoare annotation is: (<= 1 main_~l~0) [2020-07-07 14:01:09,021 INFO L271 CegarLoopResult]: At program point L20-7(lines 13 27) the Hoare annotation is: true [2020-07-07 14:01:09,021 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,022 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (<= 1 main_~l~0) [2020-07-07 14:01:09,022 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 |main_#t~post3|) (<= 1 main_~i~0)) [2020-07-07 14:01:09,022 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-07-07 14:01:09,022 INFO L264 CegarLoopResult]: At program point L21-4(line 21) the Hoare annotation is: (and (<= 2 main_~i~0) (<= 1 main_~l~0) (<= 1 |main_#t~post3|)) [2020-07-07 14:01:09,022 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-07-07 14:01:09,023 INFO L264 CegarLoopResult]: At program point L21-5(lines 21 23) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,023 INFO L264 CegarLoopResult]: At program point L21-6(lines 21 23) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,023 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 27) the Hoare annotation is: true [2020-07-07 14:01:09,023 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,024 INFO L264 CegarLoopResult]: At program point L22-1(lines 21 23) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-07-07 14:01:09,024 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (<= 1 main_~l~0) [2020-07-07 14:01:09,024 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (<= 1 main_~l~0) [2020-07-07 14:01:09,024 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-07-07 14:01:09,024 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-07-07 14:01:09,024 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-07-07 14:01:09,025 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-07-07 14:01:09,025 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:01:09,025 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:01:09,025 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:01:09,025 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= 0 |__VERIFIER_assert_#in~cond|) (not (= 0 __VERIFIER_assert_~cond))) [2020-07-07 14:01:09,026 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= 0 |__VERIFIER_assert_#in~cond|) [2020-07-07 14:01:09,045 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 07.07 02:01:09 BoogieIcfgContainer [2020-07-07 14:01:09,045 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-07 14:01:09,048 INFO L168 Benchmark]: Toolchain (without parser) took 2139.68 ms. Allocated memory was 136.8 MB in the beginning and 229.6 MB in the end (delta: 92.8 MB). Free memory was 102.2 MB in the beginning and 169.3 MB in the end (delta: -67.1 MB). Peak memory consumption was 87.9 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,050 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,051 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.21 ms. Allocated memory is still 136.8 MB. Free memory was 101.8 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,052 INFO L168 Benchmark]: Boogie Preprocessor took 108.01 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 92.4 MB in the beginning and 177.8 MB in the end (delta: -85.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,053 INFO L168 Benchmark]: RCFGBuilder took 325.01 ms. Allocated memory is still 198.7 MB. Free memory was 177.8 MB in the beginning and 162.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,054 INFO L168 Benchmark]: TraceAbstraction took 1455.69 ms. Allocated memory was 198.7 MB in the beginning and 229.6 MB in the end (delta: 30.9 MB). Free memory was 162.0 MB in the beginning and 169.3 MB in the end (delta: -7.3 MB). Peak memory consumption was 85.9 MB. Max. memory is 7.1 GB. [2020-07-07 14:01:09,058 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 136.8 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.1 kB). Peak memory consumption was 210.1 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 246.21 ms. Allocated memory is still 136.8 MB. Free memory was 101.8 MB in the beginning and 92.4 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 108.01 ms. Allocated memory was 136.8 MB in the beginning and 198.7 MB in the end (delta: 61.9 MB). Free memory was 92.4 MB in the beginning and 177.8 MB in the end (delta: -85.5 MB). Peak memory consumption was 15.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.01 ms. Allocated memory is still 198.7 MB. Free memory was 177.8 MB in the beginning and 162.0 MB in the end (delta: 15.8 MB). Peak memory consumption was 15.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1455.69 ms. Allocated memory was 198.7 MB in the beginning and 229.6 MB in the end (delta: 30.9 MB). Free memory was 162.0 MB in the beginning and 169.3 MB in the end (delta: -7.3 MB). Peak memory consumption was 85.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 20]: Loop Invariant Derived loop invariant: 1 <= l - InvariantResult [Line: 21]: Loop Invariant Derived loop invariant: 1 <= l && 1 <= i - ProcedureContractResult [Line: 13]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 6]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 0 == \old(cond) || !(0 == cond) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.9s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 88 SDtfs, 92 SDslu, 318 SDs, 0 SdLazy, 129 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=46occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 12 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 46 LocationsWithAnnotation, 58 PreInvPairs, 101 NumberOfFragments, 169 HoareAnnotationTreeSize, 58 FomulaSimplifications, 318 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 46 FomulaSimplificationsInter, 114 FormulaSimplificationTreeSizeReductionInter, 0.2s HoareSimplificationTimeInter, 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 correct! Received shutdown request...