/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/recursive-simple/id2_i5_o5-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 18:49:11,567 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 18:49:11,570 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 18:49:11,594 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 18:49:11,603 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 18:49:11,604 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 18:49:11,605 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 18:49:11,606 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 18:49:11,607 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 18:49:11,608 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 18:49:11,610 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 18:49:11,611 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 18:49:11,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 18:49:11,613 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 18:49:11,615 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 18:49:11,615 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 18:49:11,618 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 18:49:11,625 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 18:49:11,626 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 18:49:11,626 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 18:49:11,627 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 18:49:11,639 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 18:49:11,639 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 18:49:11,644 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 18:49:11,644 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 18:49:11,644 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 18:49:11,644 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 18:49:11,645 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 18:49:11,645 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 18:49:11,645 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 18:49:11,645 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 18:49:11,645 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 18:49:11,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 18:49:11,649 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 18:49:11,649 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 18:49:11,649 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 18:49:11,650 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 18:49:11,650 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 18:49:11,650 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 18:49:11,650 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 18:49:11,650 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 18:49:11,650 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 18:49:11,651 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 18:49:11,651 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 18:49:11,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 18:49:11,959 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 18:49:11,963 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 18:49:11,966 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 18:49:11,966 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 18:49:11,967 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-08-22 18:49:12,047 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c693c0ccf/51e54afb54734ba79d4a975ba65f5b2d/FLAGd9224ea13 [2020-08-22 18:49:12,522 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 18:49:12,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id2_i5_o5-1.c [2020-08-22 18:49:12,530 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c693c0ccf/51e54afb54734ba79d4a975ba65f5b2d/FLAGd9224ea13 [2020-08-22 18:49:12,899 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c693c0ccf/51e54afb54734ba79d4a975ba65f5b2d [2020-08-22 18:49:12,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 18:49:12,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 18:49:12,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:12,913 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 18:49:12,917 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 18:49:12,918 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:12" (1/1) ... [2020-08-22 18:49:12,921 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5f6d4d15 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:12, skipping insertion in model container [2020-08-22 18:49:12,921 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 06:49:12" (1/1) ... [2020-08-22 18:49:12,929 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 18:49:12,946 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 18:49:13,111 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:13,115 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 18:49:13,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 18:49:13,147 INFO L208 MainTranslator]: Completed translation [2020-08-22 18:49:13,148 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13 WrapperNode [2020-08-22 18:49:13,148 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 18:49:13,149 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 18:49:13,149 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 18:49:13,149 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 18:49:13,163 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (1/1) ... [2020-08-22 18:49:13,163 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (1/1) ... [2020-08-22 18:49:13,256 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (1/1) ... [2020-08-22 18:49:13,256 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (1/1) ... [2020-08-22 18:49:13,260 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (1/1) ... [2020-08-22 18:49:13,262 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (1/1) ... [2020-08-22 18:49:13,263 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (1/1) ... [2020-08-22 18:49:13,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 18:49:13,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 18:49:13,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 18:49:13,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 18:49:13,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (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 18:49:13,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 18:49:13,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 18:49:13,334 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-08-22 18:49:13,334 INFO L138 BoogieDeclarations]: Found implementation of procedure id2 [2020-08-22 18:49:13,334 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 18:49:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 18:49:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 18:49:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-08-22 18:49:13,334 INFO L130 BoogieDeclarations]: Found specification of procedure id2 [2020-08-22 18:49:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 18:49:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 18:49:13,335 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 18:49:13,521 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 18:49:13,521 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-08-22 18:49:13,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:13 BoogieIcfgContainer [2020-08-22 18:49:13,526 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 18:49:13,527 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 18:49:13,527 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 18:49:13,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 18:49:13,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 06:49:12" (1/3) ... [2020-08-22 18:49:13,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313be6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:13, skipping insertion in model container [2020-08-22 18:49:13,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 06:49:13" (2/3) ... [2020-08-22 18:49:13,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@313be6e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 06:49:13, skipping insertion in model container [2020-08-22 18:49:13,533 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 06:49:13" (3/3) ... [2020-08-22 18:49:13,534 INFO L109 eAbstractionObserver]: Analyzing ICFG id2_i5_o5-1.c [2020-08-22 18:49:13,550 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 18:49:13,560 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 18:49:13,576 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 18:49:13,603 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 18:49:13,603 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 18:49:13,604 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 18:49:13,604 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 18:49:13,604 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 18:49:13,605 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 18:49:13,605 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 18:49:13,605 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 18:49:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-08-22 18:49:13,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 18:49:13,641 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:13,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 18:49:13,642 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:13,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:13,650 INFO L82 PathProgramCache]: Analyzing trace with hash -588914908, now seen corresponding path program 1 times [2020-08-22 18:49:13,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:13,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957248366] [2020-08-22 18:49:13,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:13,733 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:13,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:13,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:49:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:13,875 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 18:49:13,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957248366] [2020-08-22 18:49:13,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:13,882 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 18:49:13,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004076395] [2020-08-22 18:49:13,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 18:49:13,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:13,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 18:49:13,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 18:49:13,899 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 5 states. [2020-08-22 18:49:13,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:13,999 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2020-08-22 18:49:14,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 18:49:14,001 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 18:49:14,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:14,010 INFO L225 Difference]: With dead ends: 46 [2020-08-22 18:49:14,011 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 18:49:14,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 18:49:14,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 18:49:14,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-08-22 18:49:14,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-22 18:49:14,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-08-22 18:49:14,064 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 16 [2020-08-22 18:49:14,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:14,064 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-08-22 18:49:14,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 18:49:14,065 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-08-22 18:49:14,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 18:49:14,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:14,068 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] [2020-08-22 18:49:14,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 18:49:14,068 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:14,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:14,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1852809946, now seen corresponding path program 1 times [2020-08-22 18:49:14,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:14,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249652652] [2020-08-22 18:49:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:14,072 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 18:49:14,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 18:49:14,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2020-08-22 18:49:14,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,209 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 18:49:14,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249652652] [2020-08-22 18:49:14,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 18:49:14,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 18:49:14,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001376501] [2020-08-22 18:49:14,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 18:49:14,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 18:49:14,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 18:49:14,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 18:49:14,213 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 7 states. [2020-08-22 18:49:14,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 18:49:14,314 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-08-22 18:49:14,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 18:49:14,315 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-08-22 18:49:14,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 18:49:14,317 INFO L225 Difference]: With dead ends: 45 [2020-08-22 18:49:14,317 INFO L226 Difference]: Without dead ends: 39 [2020-08-22 18:49:14,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-08-22 18:49:14,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-22 18:49:14,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-08-22 18:49:14,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 18:49:14,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2020-08-22 18:49:14,333 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 24 [2020-08-22 18:49:14,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 18:49:14,334 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2020-08-22 18:49:14,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 18:49:14,334 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2020-08-22 18:49:14,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 18:49:14,336 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 18:49:14,336 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-08-22 18:49:14,336 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 18:49:14,337 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 18:49:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 18:49:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash -238705980, now seen corresponding path program 1 times [2020-08-22 18:49:14,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 18:49:14,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835691984] [2020-08-22 18:49:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 18:49:14,432 INFO L278 leratedInterpolation]: Starting analysis with loop acceleration approximation PRECISE [2020-08-22 18:49:14,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 18:49:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 18:49:14,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-22 18:49:14,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-08-22 18:49:14,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 18:49:14,537 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: has to be unsat by construction, we do check only for interpolant computation at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:386) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolantsCraigNested(Interpolator.java:146) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.Interpolator.generateInterpolants(Interpolator.java:100) at de.uni_freiburg.informatik.ultimate.lib.acceleratedinterpolation.AcceleratedInterpolation.acceleratedInterpolationCore(AcceleratedInterpolation.java:294) 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$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-08-22 18:49:14,548 INFO L168 Benchmark]: Toolchain (without parser) took 1635.10 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 99.5 MB in the beginning and 103.2 MB in the end (delta: -3.7 MB). Peak memory consumption was 59.8 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:14,549 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 136.8 MB. Free memory was 118.1 MB in the beginning and 117.7 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-08-22 18:49:14,550 INFO L168 Benchmark]: CACSL2BoogieTranslator took 235.07 ms. Allocated memory is still 136.8 MB. Free memory was 99.1 MB in the beginning and 89.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:14,553 INFO L168 Benchmark]: Boogie Preprocessor took 115.52 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 89.5 MB in the beginning and 179.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:14,555 INFO L168 Benchmark]: RCFGBuilder took 261.50 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 166.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:14,556 INFO L168 Benchmark]: TraceAbstraction took 1017.26 ms. Allocated memory is still 200.3 MB. Free memory was 165.4 MB in the beginning and 103.2 MB in the end (delta: 62.2 MB). Peak memory consumption was 62.2 MB. Max. memory is 7.1 GB. [2020-08-22 18:49:14,566 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 136.8 MB. Free memory was 118.1 MB in the beginning and 117.7 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 235.07 ms. Allocated memory is still 136.8 MB. Free memory was 99.1 MB in the beginning and 89.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 115.52 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 89.5 MB in the beginning and 179.0 MB in the end (delta: -89.5 MB). Peak memory consumption was 14.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 261.50 ms. Allocated memory is still 200.3 MB. Free memory was 179.0 MB in the beginning and 166.4 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1017.26 ms. Allocated memory is still 200.3 MB. Free memory was 165.4 MB in the beginning and 103.2 MB in the end (delta: 62.2 MB). Peak memory consumption was 62.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: has to be unsat by construction, we do check only for interpolant computation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: has to be unsat by construction, we do check only for interpolant computation: de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:386) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...