/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 0.1.25-72570d3 [2020-08-22 19:47:40,449 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:47:40,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:47:40,484 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 19:47:40,511 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:47:40,514 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:47:40,516 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:47:40,518 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:47:40,520 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:47:40,521 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:47:40,522 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:47:40,531 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:47:40,533 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:47:40,534 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:47:40,535 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:47:40,536 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:47:40,549 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:47:40,567 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:47:40,568 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:47:40,569 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:47:40,571 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-08-22 19:47:40,584 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:47:40,585 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:47:40,587 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:47:40,587 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:47:40,588 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:47:40,588 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:47:40,588 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:47:40,588 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:47:40,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:47:40,589 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:47:40,590 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:47:40,590 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:47:40,590 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:47:40,590 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:47:40,591 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:47:40,591 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:47:40,591 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:47:40,591 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:47:40,592 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:40,592 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:47:40,592 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:47:40,593 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:47:40,593 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:47:40,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:47:40,925 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:47:40,930 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:47:40,932 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:47:40,933 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:47:40,934 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nest-if3.i [2020-08-22 19:47:41,021 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/360c460e4/93fb6a9943b4452c87230428528e9ceb/FLAG329e4a9ad [2020-08-22 19:47:41,548 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:47:41,549 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nest-if3.i [2020-08-22 19:47:41,556 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/360c460e4/93fb6a9943b4452c87230428528e9ceb/FLAG329e4a9ad [2020-08-22 19:47:41,901 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/360c460e4/93fb6a9943b4452c87230428528e9ceb [2020-08-22 19:47:41,910 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:47:41,912 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:47:41,913 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:41,914 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:47:41,918 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:47:41,919 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:41" (1/1) ... [2020-08-22 19:47:41,923 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb2e3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:41, skipping insertion in model container [2020-08-22 19:47:41,923 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:47:41" (1/1) ... [2020-08-22 19:47:41,932 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:47:41,950 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:47:42,149 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:42,153 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:47:42,168 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:47:42,183 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:47:42,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42 WrapperNode [2020-08-22 19:47:42,184 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:47:42,185 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:47:42,185 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:47:42,185 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:47:42,197 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (1/1) ... [2020-08-22 19:47:42,198 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (1/1) ... [2020-08-22 19:47:42,202 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (1/1) ... [2020-08-22 19:47:42,203 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (1/1) ... [2020-08-22 19:47:42,206 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (1/1) ... [2020-08-22 19:47:42,212 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (1/1) ... [2020-08-22 19:47:42,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (1/1) ... [2020-08-22 19:47:42,294 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:47:42,295 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:47:42,295 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:47:42,295 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:47:42,296 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:47:42,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:47:42,368 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:47:42,368 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 19:47:42,368 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:47:42,368 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:47:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:47:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 19:47:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 19:47:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:47:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:47:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:47:42,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:47:42,370 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:47:42,639 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:47:42,639 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 19:47:42,645 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:42 BoogieIcfgContainer [2020-08-22 19:47:42,645 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:47:42,647 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:47:42,647 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:47:42,651 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:47:42,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:47:41" (1/3) ... [2020-08-22 19:47:42,652 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74816834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:42, skipping insertion in model container [2020-08-22 19:47:42,652 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:47:42" (2/3) ... [2020-08-22 19:47:42,653 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74816834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:47:42, skipping insertion in model container [2020-08-22 19:47:42,653 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:47:42" (3/3) ... [2020-08-22 19:47:42,655 INFO L109 eAbstractionObserver]: Analyzing ICFG nest-if3.i [2020-08-22 19:47:42,669 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:47:42,678 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:47:42,697 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:47:42,737 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:47:42,738 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:47:42,738 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:47:42,738 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:47:42,740 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:47:42,740 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:47:42,740 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:47:42,740 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:47:42,776 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-08-22 19:47:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 19:47:42,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:42,798 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] [2020-08-22 19:47:42,799 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:42,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:42,808 INFO L82 PathProgramCache]: Analyzing trace with hash 781844856, now seen corresponding path program 1 times [2020-08-22 19:47:42,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:42,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679694168] [2020-08-22 19:47:42,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:42,897 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:42,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:43,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:43,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:43,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679694168] [2020-08-22 19:47:43,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:43,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:47:43,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481499185] [2020-08-22 19:47:43,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:47:43,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:43,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:47:43,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:47:43,115 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 6 states. [2020-08-22 19:47:43,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:43,297 INFO L93 Difference]: Finished difference Result 93 states and 114 transitions. [2020-08-22 19:47:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 19:47:43,299 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2020-08-22 19:47:43,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:43,309 INFO L225 Difference]: With dead ends: 93 [2020-08-22 19:47:43,310 INFO L226 Difference]: Without dead ends: 57 [2020-08-22 19:47:43,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:43,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-08-22 19:47:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 45. [2020-08-22 19:47:43,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 19:47:43,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-08-22 19:47:43,368 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 25 [2020-08-22 19:47:43,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:43,369 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-08-22 19:47:43,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:47:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-08-22 19:47:43,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 19:47:43,371 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:47:43,371 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] [2020-08-22 19:47:43,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:47:43,372 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:47:43,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:47:43,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1778608888, now seen corresponding path program 1 times [2020-08-22 19:47:43,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:47:43,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498884543] [2020-08-22 19:47:43,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:47:43,403 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:47:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:43,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:47:43,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:43,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 19:47:43,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:47:43,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 19:47:43,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498884543] [2020-08-22 19:47:43,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:47:43,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 19:47:43,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457394193] [2020-08-22 19:47:43,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 19:47:43,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:47:43,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 19:47:43,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 19:47:43,544 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 8 states. [2020-08-22 19:47:43,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:47:43,843 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-08-22 19:47:43,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 19:47:43,844 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-08-22 19:47:43,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:47:43,845 INFO L225 Difference]: With dead ends: 59 [2020-08-22 19:47:43,845 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:47:43,848 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 [2020-08-22 19:47:43,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:47:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:47:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:47:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:47:43,849 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 34 [2020-08-22 19:47:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:47:43,850 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:47:43,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 19:47:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:47:43,850 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:47:43,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:47:43,854 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:47:44,266 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:47:44,266 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:47:44,267 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:47:44,267 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:47:44,268 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:47:44,268 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:47:44,268 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:44,268 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:44,268 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 19:47:44,268 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 19:47:44,269 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 19:47:44,269 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 27) the Hoare annotation is: true [2020-08-22 19:47:44,269 INFO L264 CegarLoopResult]: At program point L19(line 19) the Hoare annotation is: (<= 1 main_~l~0) [2020-08-22 19:47:44,269 INFO L264 CegarLoopResult]: At program point L19-1(line 19) the Hoare annotation is: (<= 1 main_~l~0) [2020-08-22 19:47:44,269 INFO L271 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: true [2020-08-22 19:47:44,270 INFO L271 CegarLoopResult]: At program point L15-1(line 15) the Hoare annotation is: true [2020-08-22 19:47:44,271 INFO L271 CegarLoopResult]: At program point L15-2(line 15) the Hoare annotation is: true [2020-08-22 19:47:44,272 INFO L264 CegarLoopResult]: At program point L24(lines 24 25) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,272 INFO L264 CegarLoopResult]: At program point L24-1(line 24) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,273 INFO L264 CegarLoopResult]: At program point L24-3(line 24) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,273 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (<= 1 main_~l~0) [2020-08-22 19:47:44,274 INFO L264 CegarLoopResult]: At program point L20-3(lines 20 26) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,276 INFO L271 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: true [2020-08-22 19:47:44,276 INFO L264 CegarLoopResult]: At program point L20-4(line 20) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,277 INFO L271 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: true [2020-08-22 19:47:44,277 INFO L264 CegarLoopResult]: At program point L20-5(line 20) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,277 INFO L271 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: true [2020-08-22 19:47:44,277 INFO L264 CegarLoopResult]: At program point L20-6(lines 20 26) the Hoare annotation is: (<= 1 main_~l~0) [2020-08-22 19:47:44,277 INFO L271 CegarLoopResult]: At program point L20-7(lines 13 27) the Hoare annotation is: true [2020-08-22 19:47:44,278 INFO L264 CegarLoopResult]: At program point L25(line 25) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,278 INFO L264 CegarLoopResult]: At program point L21(line 21) the Hoare annotation is: (<= 1 main_~l~0) [2020-08-22 19:47:44,278 INFO L264 CegarLoopResult]: At program point L21-3(line 21) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0) (<= 1 |main_#t~post3|)) [2020-08-22 19:47:44,278 INFO L271 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: true [2020-08-22 19:47:44,280 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|)) [2020-08-22 19:47:44,280 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-08-22 19:47:44,280 INFO L264 CegarLoopResult]: At program point L21-5(lines 21 23) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,281 INFO L264 CegarLoopResult]: At program point L21-6(lines 21 23) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,281 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 27) the Hoare annotation is: true [2020-08-22 19:47:44,281 INFO L264 CegarLoopResult]: At program point L22(line 22) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,281 INFO L264 CegarLoopResult]: At program point L22-1(lines 21 23) the Hoare annotation is: (and (<= 1 main_~l~0) (<= 1 main_~i~0)) [2020-08-22 19:47:44,282 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (<= 1 main_~l~0) [2020-08-22 19:47:44,282 INFO L264 CegarLoopResult]: At program point L18-1(line 18) the Hoare annotation is: (<= 1 main_~l~0) [2020-08-22 19:47:44,282 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 19:47:44,282 INFO L271 CegarLoopResult]: At program point L14-1(line 14) the Hoare annotation is: true [2020-08-22 19:47:44,282 INFO L271 CegarLoopResult]: At program point L14-2(line 14) the Hoare annotation is: true [2020-08-22 19:47:44,282 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 19:47:44,283 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:44,283 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:47:44,283 INFO L264 CegarLoopResult]: At program point L7(lines 7 9) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:44,283 INFO L264 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: (or (= |__VERIFIER_assert_#in~cond| 0) (not (= __VERIFIER_assert_~cond 0))) [2020-08-22 19:47:44,284 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 19:47:44,318 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:47:44 BoogieIcfgContainer [2020-08-22 19:47:44,318 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:47:44,324 INFO L168 Benchmark]: Toolchain (without parser) took 2408.81 ms. Allocated memory was 140.5 MB in the beginning and 233.8 MB in the end (delta: 93.3 MB). Free memory was 103.6 MB in the beginning and 166.6 MB in the end (delta: -63.0 MB). Peak memory consumption was 80.6 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:44,327 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:47:44,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 270.89 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:44,331 INFO L168 Benchmark]: Boogie Preprocessor took 109.74 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 183.4 MB in the end (delta: -89.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:44,334 INFO L168 Benchmark]: RCFGBuilder took 350.65 ms. Allocated memory is still 203.4 MB. Free memory was 183.4 MB in the beginning and 167.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:44,336 INFO L168 Benchmark]: TraceAbstraction took 1671.54 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 166.5 MB in the beginning and 166.6 MB in the end (delta: -53.4 kB). Peak memory consumption was 80.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:47:44,350 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 140.5 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 270.89 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.8 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 109.74 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.8 MB in the beginning and 183.4 MB in the end (delta: -89.7 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 350.65 ms. Allocated memory is still 203.4 MB. Free memory was 183.4 MB in the beginning and 167.2 MB in the end (delta: 16.3 MB). Peak memory consumption was 16.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 1671.54 ms. Allocated memory was 203.4 MB in the beginning and 233.8 MB in the end (delta: 30.4 MB). Free memory was 166.5 MB in the beginning and 166.6 MB in the end (delta: -53.4 kB). Peak memory consumption was 80.7 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: \old(cond) == 0 || !(cond == 0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.1s, OverallIterations: 2, TraceHistogramMax: 2, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 88 SDtfs, 92 SDslu, 318 SDs, 0 SdLazy, 129 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s 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...