/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-invariants/odd.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 19:50:31,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 19:50:31,335 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 19:50:31,382 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 19:50:31,383 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 19:50:31,396 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 19:50:31,398 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 19:50:31,402 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 19:50:31,404 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 19:50:31,407 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 19:50:31,408 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 19:50:31,410 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 19:50:31,411 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 19:50:31,414 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 19:50:31,417 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 19:50:31,419 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 19:50:31,420 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 19:50:31,422 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 19:50:31,424 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 19:50:31,432 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 19:50:31,435 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 19:50:31,436 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 19:50:31,437 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 19:50:31,438 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 19:50:31,450 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 19:50:31,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 19:50:31,461 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 19:50:31,462 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 19:50:31,463 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 19:50:31,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 19:50:31,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 19:50:31,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 19:50:31,474 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 19:50:31,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 19:50:31,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 19:50:31,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 19:50:31,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 19:50:31,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 19:50:31,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 19:50:31,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 19:50:31,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 19:50:31,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 19:50:31,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 19:50:31,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 19:50:31,476 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 19:50:31,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 19:50:31,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 19:50:31,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 19:50:31,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 19:50:31,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 19:50:31,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 19:50:31,478 INFO L138 SettingsManager]: * Use separate solver for trace checks=false [2020-08-22 19:50:31,776 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 19:50:31,798 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 19:50:31,801 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 19:50:31,803 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 19:50:31,803 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 19:50:31,804 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invariants/odd.c [2020-08-22 19:50:31,890 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af1ddc523/7a9aab53c54148b493e0d7d2da8364d9/FLAG89c1c0e97 [2020-08-22 19:50:32,349 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 19:50:32,350 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invariants/odd.c [2020-08-22 19:50:32,356 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af1ddc523/7a9aab53c54148b493e0d7d2da8364d9/FLAG89c1c0e97 [2020-08-22 19:50:32,782 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/af1ddc523/7a9aab53c54148b493e0d7d2da8364d9 [2020-08-22 19:50:32,793 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 19:50:32,795 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 19:50:32,796 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:32,796 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 19:50:32,800 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 19:50:32,801 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:32" (1/1) ... [2020-08-22 19:50:32,804 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16476c77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:32, skipping insertion in model container [2020-08-22 19:50:32,804 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 07:50:32" (1/1) ... [2020-08-22 19:50:32,812 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 19:50:32,833 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 19:50:33,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:33,021 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 19:50:33,038 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 19:50:33,053 INFO L208 MainTranslator]: Completed translation [2020-08-22 19:50:33,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33 WrapperNode [2020-08-22 19:50:33,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 19:50:33,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 19:50:33,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 19:50:33,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 19:50:33,070 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,070 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,170 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,177 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (1/1) ... [2020-08-22 19:50:33,182 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 19:50:33,183 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 19:50:33,183 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 19:50:33,183 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 19:50:33,185 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (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 19:50:33,252 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 19:50:33,253 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 19:50:33,253 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 19:50:33,253 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 19:50:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 19:50:33,253 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 19:50:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 19:50:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 19:50:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 19:50:33,254 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 19:50:33,434 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 19:50:33,435 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 19:50:33,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:33 BoogieIcfgContainer [2020-08-22 19:50:33,439 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 19:50:33,440 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 19:50:33,440 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 19:50:33,443 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 19:50:33,444 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 07:50:32" (1/3) ... [2020-08-22 19:50:33,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fe0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:33, skipping insertion in model container [2020-08-22 19:50:33,445 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 07:50:33" (2/3) ... [2020-08-22 19:50:33,445 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55fe0b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 07:50:33, skipping insertion in model container [2020-08-22 19:50:33,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 07:50:33" (3/3) ... [2020-08-22 19:50:33,448 INFO L109 eAbstractionObserver]: Analyzing ICFG odd.c [2020-08-22 19:50:33,458 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 19:50:33,465 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 19:50:33,479 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 19:50:33,503 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 19:50:33,503 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 19:50:33,503 INFO L377 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-08-22 19:50:33,503 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 19:50:33,504 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 19:50:33,504 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 19:50:33,504 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 19:50:33,504 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 19:50:33,519 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-08-22 19:50:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-08-22 19:50:33,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:33,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:33,532 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1137787585, now seen corresponding path program 1 times [2020-08-22 19:50:33,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:33,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986623161] [2020-08-22 19:50:33,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:33,597 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:33,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:33,649 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 19:50:33,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986623161] [2020-08-22 19:50:33,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:33,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 19:50:33,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225711186] [2020-08-22 19:50:33,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 19:50:33,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:33,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 19:50:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:50:33,676 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-08-22 19:50:33,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:33,698 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2020-08-22 19:50:33,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 19:50:33,699 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-08-22 19:50:33,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:33,708 INFO L225 Difference]: With dead ends: 34 [2020-08-22 19:50:33,708 INFO L226 Difference]: Without dead ends: 15 [2020-08-22 19:50:33,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 19:50:33,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2020-08-22 19:50:33,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2020-08-22 19:50:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-08-22 19:50:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-08-22 19:50:33,753 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 10 [2020-08-22 19:50:33,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:33,754 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-08-22 19:50:33,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 19:50:33,754 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-08-22 19:50:33,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-22 19:50:33,755 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:33,755 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:33,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 19:50:33,756 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:33,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:33,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1424281528, now seen corresponding path program 1 times [2020-08-22 19:50:33,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:33,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [393720166] [2020-08-22 19:50:33,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:33,759 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:33,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:33,873 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 19:50:33,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [393720166] [2020-08-22 19:50:33,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:33,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 19:50:33,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252272388] [2020-08-22 19:50:33,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 19:50:33,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:33,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 19:50:33,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 19:50:33,879 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-08-22 19:50:33,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:33,947 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-08-22 19:50:33,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 19:50:33,948 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-08-22 19:50:33,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:33,949 INFO L225 Difference]: With dead ends: 25 [2020-08-22 19:50:33,950 INFO L226 Difference]: Without dead ends: 19 [2020-08-22 19:50:33,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 19:50:33,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-08-22 19:50:33,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2020-08-22 19:50:33,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-08-22 19:50:33,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-08-22 19:50:33,973 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 12 [2020-08-22 19:50:33,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:33,973 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-08-22 19:50:33,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 19:50:33,974 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-08-22 19:50:33,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 19:50:33,974 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 19:50:33,975 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 19:50:33,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 19:50:33,975 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 19:50:33,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 19:50:33,976 INFO L82 PathProgramCache]: Analyzing trace with hash 712011441, now seen corresponding path program 1 times [2020-08-22 19:50:33,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 19:50:33,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426926550] [2020-08-22 19:50:33,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 19:50:34,000 INFO L288 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-08-22 19:50:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:34,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 19:50:34,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 19:50:34,089 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 19:50:34,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426926550] [2020-08-22 19:50:34,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 19:50:34,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 19:50:34,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069215603] [2020-08-22 19:50:34,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 19:50:34,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 19:50:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 19:50:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 19:50:34,092 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-08-22 19:50:34,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 19:50:34,127 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-08-22 19:50:34,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 19:50:34,127 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-22 19:50:34,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 19:50:34,128 INFO L225 Difference]: With dead ends: 19 [2020-08-22 19:50:34,128 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 19:50:34,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 19:50:34,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 19:50:34,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 19:50:34,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 19:50:34,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 19:50:34,131 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 16 [2020-08-22 19:50:34,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 19:50:34,131 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 19:50:34,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 19:50:34,131 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 19:50:34,132 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 19:50:34,132 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 19:50:34,135 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 19:50:34,300 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:50:34,300 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:50:34,300 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 19:50:34,300 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 19:50:34,301 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 19:50:34,301 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 19:50:34,301 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 9 16) the Hoare annotation is: true [2020-08-22 19:50:34,301 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 9 16) the Hoare annotation is: true [2020-08-22 19:50:34,301 INFO L271 CegarLoopResult]: At program point L14(line 14) the Hoare annotation is: true [2020-08-22 19:50:34,302 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 9 16) the Hoare annotation is: true [2020-08-22 19:50:34,302 INFO L264 CegarLoopResult]: At program point L12(line 12) the Hoare annotation is: (<= (+ (* 2 (div main_~x~0 2)) 1) main_~x~0) [2020-08-22 19:50:34,302 INFO L264 CegarLoopResult]: At program point L11-1(lines 11 13) the Hoare annotation is: (<= (+ (* 2 (div main_~x~0 2)) 1) main_~x~0) [2020-08-22 19:50:34,302 INFO L264 CegarLoopResult]: At program point L11-2(line 11) the Hoare annotation is: (<= (+ (* 2 (div main_~x~0 2)) 1) main_~x~0) [2020-08-22 19:50:34,303 INFO L264 CegarLoopResult]: At program point L11-4(line 11) the Hoare annotation is: (<= (+ (* 2 (div main_~x~0 2)) 1) main_~x~0) [2020-08-22 19:50:34,303 INFO L264 CegarLoopResult]: At program point L11-5(lines 11 13) the Hoare annotation is: (<= (+ (* 2 (div main_~x~0 2)) 1) main_~x~0) [2020-08-22 19:50:34,303 INFO L264 CegarLoopResult]: At program point L11-6(lines 11 13) the Hoare annotation is: (<= (+ (* 2 (div main_~x~0 2)) 1) main_~x~0) [2020-08-22 19:50:34,303 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:34,304 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:34,304 INFO L264 CegarLoopResult]: At program point L5(line 5) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-08-22 19:50:34,304 INFO L264 CegarLoopResult]: At program point L4(lines 4 6) the Hoare annotation is: (or (<= 1 __VERIFIER_assert_~cond) (not (<= 1 |__VERIFIER_assert_#in~cond|))) [2020-08-22 19:50:34,304 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) the Hoare annotation is: (not (<= 1 |__VERIFIER_assert_#in~cond|)) [2020-08-22 19:50:34,305 INFO L271 CegarLoopResult]: At program point L4-2(lines 3 8) the Hoare annotation is: true [2020-08-22 19:50:34,324 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 07:50:34 BoogieIcfgContainer [2020-08-22 19:50:34,324 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 19:50:34,327 INFO L168 Benchmark]: Toolchain (without parser) took 1531.57 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 102.7 MB in the beginning and 115.6 MB in the end (delta: -12.9 MB). Peak memory consumption was 43.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:34,329 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-08-22 19:50:34,330 INFO L168 Benchmark]: CACSL2BoogieTranslator took 258.43 ms. Allocated memory is still 146.8 MB. Free memory was 102.5 MB in the beginning and 93.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:34,331 INFO L168 Benchmark]: Boogie Preprocessor took 128.08 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 93.1 MB in the beginning and 181.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:34,332 INFO L168 Benchmark]: RCFGBuilder took 255.72 ms. Allocated memory is still 203.4 MB. Free memory was 181.1 MB in the beginning and 170.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:34,333 INFO L168 Benchmark]: TraceAbstraction took 884.14 ms. Allocated memory is still 203.4 MB. Free memory was 169.7 MB in the beginning and 115.6 MB in the end (delta: 54.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. [2020-08-22 19:50:34,337 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 146.8 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 258.43 ms. Allocated memory is still 146.8 MB. Free memory was 102.5 MB in the beginning and 93.1 MB in the end (delta: 9.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 128.08 ms. Allocated memory was 146.8 MB in the beginning and 203.4 MB in the end (delta: 56.6 MB). Free memory was 93.1 MB in the beginning and 181.1 MB in the end (delta: -88.0 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 255.72 ms. Allocated memory is still 203.4 MB. Free memory was 181.1 MB in the beginning and 170.4 MB in the end (delta: 10.7 MB). Peak memory consumption was 10.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 884.14 ms. Allocated memory is still 203.4 MB. Free memory was 169.7 MB in the beginning and 115.6 MB in the end (delta: 54.2 MB). Peak memory consumption was 54.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: 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: 11]: Loop Invariant Derived loop invariant: 2 * (x / 2) + 1 <= x - ProcedureContractResult [Line: 9]: Procedure Contract for main Derived contract for procedure main: 1 - ProcedureContractResult [Line: 3]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 0.6s, OverallIterations: 3, TraceHistogramMax: 2, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 46 SDtfs, 8 SDslu, 72 SDs, 0 SdLazy, 17 SolverSat, 2 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22occurred 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, 3 MinimizatonAttempts, 2 StatesRemovedByMinimization, 1 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 34 PreInvPairs, 50 NumberOfFragments, 83 HoareAnnotationTreeSize, 34 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 22 FomulaSimplificationsInter, 52 FormulaSimplificationTreeSizeReductionInter, 0.0s 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...