/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 --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/loop-new/half.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-72570d3 [2020-08-22 23:05:41,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 23:05:41,638 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 23:05:41,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-22 23:05:41,713 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 23:05:41,717 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 23:05:41,719 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 23:05:41,721 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 23:05:41,723 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 23:05:41,725 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 23:05:41,728 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 23:05:41,735 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 23:05:41,738 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 23:05:41,739 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 23:05:41,740 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 23:05:41,741 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 23:05:41,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 23:05:41,758 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 23:05:41,759 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 23:05:41,760 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 23:05:41,761 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 23:05:41,776 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 23:05:41,777 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 23:05:41,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 23:05:41,779 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 23:05:41,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 23:05:41,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 23:05:41,780 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 23:05:41,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 23:05:41,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 23:05:41,780 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 23:05:41,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 23:05:41,782 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 23:05:41,782 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 23:05:41,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 23:05:41,783 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 23:05:41,783 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-08-22 23:05:41,783 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 23:05:41,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 23:05:41,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 23:05:41,784 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 23:05:41,784 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-08-22 23:05:41,785 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 23:05:41,785 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-08-22 23:05:42,068 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 23:05:42,089 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 23:05:42,093 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 23:05:42,094 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 23:05:42,095 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 23:05:42,096 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-08-22 23:05:42,182 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7750ad4fb/46094a553f0849be8780a713810ac7cd/FLAGee25ac367 [2020-08-22 23:05:42,703 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 23:05:42,703 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-new/half.i [2020-08-22 23:05:42,710 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7750ad4fb/46094a553f0849be8780a713810ac7cd/FLAGee25ac367 [2020-08-22 23:05:43,078 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7750ad4fb/46094a553f0849be8780a713810ac7cd [2020-08-22 23:05:43,086 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 23:05:43,088 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 23:05:43,090 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:43,090 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 23:05:43,093 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 23:05:43,094 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,097 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ebaa4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43, skipping insertion in model container [2020-08-22 23:05:43,097 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,105 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 23:05:43,121 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 23:05:43,295 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:43,299 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 23:05:43,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 23:05:43,331 INFO L208 MainTranslator]: Completed translation [2020-08-22 23:05:43,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43 WrapperNode [2020-08-22 23:05:43,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 23:05:43,332 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 23:05:43,332 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 23:05:43,333 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 23:05:43,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,352 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,352 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,356 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,444 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,445 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (1/1) ... [2020-08-22 23:05:43,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 23:05:43,447 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 23:05:43,447 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 23:05:43,447 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 23:05:43,448 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (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 23:05:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 23:05:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 23:05:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-22 23:05:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 23:05:43,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 23:05:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 23:05:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-22 23:05:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-22 23:05:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 23:05:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 23:05:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 23:05:43,512 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 23:05:43,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 23:05:43,723 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 23:05:43,723 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 23:05:43,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:43 BoogieIcfgContainer [2020-08-22 23:05:43,728 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 23:05:43,730 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 23:05:43,730 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 23:05:43,733 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 23:05:43,734 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 11:05:43" (1/3) ... [2020-08-22 23:05:43,734 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a417a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:43, skipping insertion in model container [2020-08-22 23:05:43,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 11:05:43" (2/3) ... [2020-08-22 23:05:43,735 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a417a23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 11:05:43, skipping insertion in model container [2020-08-22 23:05:43,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 11:05:43" (3/3) ... [2020-08-22 23:05:43,737 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-08-22 23:05:43,749 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 23:05:43,758 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 23:05:43,779 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 23:05:43,845 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 23:05:43,845 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 23:05:43,845 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 23:05:43,846 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 23:05:43,846 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 23:05:43,846 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 23:05:43,846 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 23:05:43,846 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 23:05:43,869 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-08-22 23:05:43,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 23:05:43,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:43,885 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:43,886 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:43,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:43,896 INFO L82 PathProgramCache]: Analyzing trace with hash 789700725, now seen corresponding path program 1 times [2020-08-22 23:05:43,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:43,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655181282] [2020-08-22 23:05:43,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:43,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:44,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:44,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:44,030 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 23:05:44,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655181282] [2020-08-22 23:05:44,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:44,033 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-08-22 23:05:44,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989492132] [2020-08-22 23:05:44,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-08-22 23:05:44,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:44,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-08-22 23:05:44,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-08-22 23:05:44,058 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-08-22 23:05:44,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:44,094 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-08-22 23:05:44,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-08-22 23:05:44,095 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-08-22 23:05:44,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:44,106 INFO L225 Difference]: With dead ends: 44 [2020-08-22 23:05:44,107 INFO L226 Difference]: Without dead ends: 24 [2020-08-22 23:05:44,113 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 23:05:44,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-22 23:05:44,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-08-22 23:05:44,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-22 23:05:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-08-22 23:05:44,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2020-08-22 23:05:44,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:44,164 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-08-22 23:05:44,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-08-22 23:05:44,165 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-08-22 23:05:44,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 23:05:44,166 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:44,166 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:44,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 23:05:44,168 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:44,170 INFO L82 PathProgramCache]: Analyzing trace with hash 774924389, now seen corresponding path program 1 times [2020-08-22 23:05:44,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:44,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513960411] [2020-08-22 23:05:44,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:44,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:44,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:44,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:44,394 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 23:05:44,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513960411] [2020-08-22 23:05:44,395 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 23:05:44,395 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 23:05:44,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343847788] [2020-08-22 23:05:44,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 23:05:44,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:44,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 23:05:44,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 23:05:44,400 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-08-22 23:05:44,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:44,577 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-08-22 23:05:44,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 23:05:44,578 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-08-22 23:05:44,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:44,581 INFO L225 Difference]: With dead ends: 43 [2020-08-22 23:05:44,582 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 23:05:44,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:05:44,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 23:05:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2020-08-22 23:05:44,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-08-22 23:05:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-08-22 23:05:44,594 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2020-08-22 23:05:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:44,594 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-08-22 23:05:44,594 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 23:05:44,595 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-08-22 23:05:44,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 23:05:44,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:44,596 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] [2020-08-22 23:05:44,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 23:05:44,596 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:44,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:44,597 INFO L82 PathProgramCache]: Analyzing trace with hash 775379929, now seen corresponding path program 1 times [2020-08-22 23:05:44,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:44,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883080063] [2020-08-22 23:05:44,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:44,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:44,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883080063] [2020-08-22 23:05:44,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:44,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 23:05:44,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839981457] [2020-08-22 23:05:44,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 23:05:44,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:44,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 23:05:44,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-08-22 23:05:44,786 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-08-22 23:05:45,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:45,056 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-08-22 23:05:45,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 23:05:45,057 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-08-22 23:05:45,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:45,059 INFO L225 Difference]: With dead ends: 48 [2020-08-22 23:05:45,059 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 23:05:45,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:05:45,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 23:05:45,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-08-22 23:05:45,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-08-22 23:05:45,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-08-22 23:05:45,069 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-08-22 23:05:45,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:45,069 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-08-22 23:05:45,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 23:05:45,070 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-08-22 23:05:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 23:05:45,071 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:45,071 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 23:05:45,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 23:05:45,071 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:45,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:45,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1973531292, now seen corresponding path program 1 times [2020-08-22 23:05:45,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:45,072 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124589632] [2020-08-22 23:05:45,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:45,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:45,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:45,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:45,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124589632] [2020-08-22 23:05:45,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:45,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 23:05:45,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052074196] [2020-08-22 23:05:45,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 23:05:45,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:45,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 23:05:45,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 23:05:45,212 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-08-22 23:05:45,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:45,331 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-08-22 23:05:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 23:05:45,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-22 23:05:45,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:45,333 INFO L225 Difference]: With dead ends: 58 [2020-08-22 23:05:45,333 INFO L226 Difference]: Without dead ends: 41 [2020-08-22 23:05:45,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:05:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-08-22 23:05:45,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-08-22 23:05:45,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-22 23:05:45,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-08-22 23:05:45,342 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2020-08-22 23:05:45,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:45,342 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-08-22 23:05:45,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 23:05:45,343 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-08-22 23:05:45,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-22 23:05:45,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:45,344 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:45,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 23:05:45,344 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:45,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:45,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1981883390, now seen corresponding path program 1 times [2020-08-22 23:05:45,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:45,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399967637] [2020-08-22 23:05:45,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:45,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:45,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:45,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:45,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:45,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399967637] [2020-08-22 23:05:45,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:45,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 23:05:45,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420491005] [2020-08-22 23:05:45,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 23:05:45,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:45,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 23:05:45,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-08-22 23:05:45,746 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 14 states. [2020-08-22 23:05:46,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:46,288 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-08-22 23:05:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 23:05:46,288 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-08-22 23:05:46,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:46,290 INFO L225 Difference]: With dead ends: 67 [2020-08-22 23:05:46,290 INFO L226 Difference]: Without dead ends: 43 [2020-08-22 23:05:46,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 23:05:46,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-22 23:05:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-08-22 23:05:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 23:05:46,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-08-22 23:05:46,300 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29 [2020-08-22 23:05:46,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:46,301 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-08-22 23:05:46,301 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 23:05:46,301 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-08-22 23:05:46,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-08-22 23:05:46,302 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:46,302 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:46,302 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 23:05:46,303 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:46,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:46,303 INFO L82 PathProgramCache]: Analyzing trace with hash -282773191, now seen corresponding path program 2 times [2020-08-22 23:05:46,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:46,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125951430] [2020-08-22 23:05:46,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:46,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:46,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:46,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 23:05:46,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125951430] [2020-08-22 23:05:46,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:46,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 23:05:46,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131076375] [2020-08-22 23:05:46,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 23:05:46,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:46,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 23:05:46,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-08-22 23:05:46,445 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2020-08-22 23:05:46,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:46,884 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-08-22 23:05:46,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 23:05:46,885 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-08-22 23:05:46,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:46,886 INFO L225 Difference]: With dead ends: 65 [2020-08-22 23:05:46,886 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 23:05:46,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-08-22 23:05:46,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 23:05:46,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2020-08-22 23:05:46,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 23:05:46,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-22 23:05:46,899 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 37 [2020-08-22 23:05:46,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:46,900 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-22 23:05:46,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 23:05:46,900 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-22 23:05:46,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-22 23:05:46,901 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 23:05:46,901 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 23:05:46,902 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 23:05:46,902 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 23:05:46,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 23:05:46,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1065873285, now seen corresponding path program 3 times [2020-08-22 23:05:46,903 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 23:05:46,903 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1107503635] [2020-08-22 23:05:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 23:05:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:47,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 23:05:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 23:05:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-08-22 23:05:47,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1107503635] [2020-08-22 23:05:47,222 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 23:05:47,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 23:05:47,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210281505] [2020-08-22 23:05:47,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 23:05:47,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 23:05:47,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 23:05:47,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-08-22 23:05:47,224 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 15 states. [2020-08-22 23:05:47,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 23:05:47,701 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-08-22 23:05:47,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 23:05:47,701 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-08-22 23:05:47,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 23:05:47,702 INFO L225 Difference]: With dead ends: 71 [2020-08-22 23:05:47,702 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 23:05:47,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2020-08-22 23:05:47,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 23:05:47,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 23:05:47,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 23:05:47,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 23:05:47,707 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2020-08-22 23:05:47,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 23:05:47,707 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 23:05:47,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 23:05:47,708 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 23:05:47,708 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 23:05:47,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 23:05:47,711 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 23:05:48,376 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:48,377 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:48,377 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-08-22 23:05:48,377 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 23:05:48,377 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 23:05:48,378 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-08-22 23:05:48,378 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:48,378 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:48,378 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-22 23:05:48,378 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-08-22 23:05:48,379 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-22 23:05:48,379 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 25) the Hoare annotation is: true [2020-08-22 23:05:48,379 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-08-22 23:05:48,379 INFO L264 CegarLoopResult]: At program point L19(lines 19 21) the Hoare annotation is: (let ((.cse2 (* 2 main_~k~0)) (.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse1 .cse0) (<= .cse1 .cse2))) (and (<= (+ main_~i~0 2) .cse2) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0)))) [2020-08-22 23:05:48,380 INFO L264 CegarLoopResult]: At program point L17(line 17) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~i~0 0) (<= main_~n~0 0) (<= 0 main_~i~0)) [2020-08-22 23:05:48,380 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-08-22 23:05:48,380 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~i~0)) [2020-08-22 23:05:48,380 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 25) the Hoare annotation is: true [2020-08-22 23:05:48,381 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 25) the Hoare annotation is: true [2020-08-22 23:05:48,381 INFO L264 CegarLoopResult]: At program point L20(line 20) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (and (<= (+ main_~i~0 2) (* 2 main_~k~0)) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0))) [2020-08-22 23:05:48,381 INFO L264 CegarLoopResult]: At program point L20-1(line 20) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0)) (.cse0 (* 2 |main_#t~post2|))) (and (<= (+ main_~i~0 2) (* 2 main_~k~0)) (<= .cse0 main_~i~0) (<= .cse1 main_~i~0) (<= main_~i~0 .cse1) (<= main_~i~0 .cse0))) [2020-08-22 23:05:48,381 INFO L264 CegarLoopResult]: At program point L18(line 18) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~i~0 0) (<= main_~n~0 0) (<= 0 main_~i~0)) [2020-08-22 23:05:48,381 INFO L264 CegarLoopResult]: At program point L20-2(line 20) the Hoare annotation is: (let ((.cse2 (* 2 main_~n~0)) (.cse0 (+ main_~i~0 2)) (.cse1 (* 2 |main_#t~post2|))) (and (<= .cse0 (* 2 main_~k~0)) (<= .cse1 main_~i~0) (<= .cse0 .cse2) (<= .cse2 .cse0) (<= main_~i~0 .cse1))) [2020-08-22 23:05:48,382 INFO L264 CegarLoopResult]: At program point L16(line 16) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~i~0 0) (<= main_~n~0 0) (<= 0 main_~i~0)) [2020-08-22 23:05:48,382 INFO L264 CegarLoopResult]: At program point L16-1(line 16) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~i~0 0) (<= main_~n~0 0) (<= 0 main_~i~0)) [2020-08-22 23:05:48,382 INFO L264 CegarLoopResult]: At program point L18-3(lines 18 22) the Hoare annotation is: (let ((.cse2 (* 2 main_~n~0)) (.cse1 (* 2 main_~k~0))) (or (let ((.cse0 (+ main_~i~0 2))) (and (<= .cse0 .cse1) (<= .cse0 .cse2) (<= .cse2 .cse0))) (let ((.cse3 (+ main_~i~0 1))) (and (<= .cse2 .cse3) (<= .cse3 .cse2) (<= .cse3 .cse1))))) [2020-08-22 23:05:48,382 INFO L264 CegarLoopResult]: At program point L16-2(line 16) the Hoare annotation is: (and (<= 0 main_~n~0) (<= main_~i~0 0) (<= main_~n~0 0) (<= 0 main_~i~0)) [2020-08-22 23:05:48,383 INFO L264 CegarLoopResult]: At program point L18-4(line 18) the Hoare annotation is: (let ((.cse3 (* 2 main_~k~0)) (.cse0 (* 2 main_~n~0))) (or (let ((.cse2 (+ |main_#t~post1| 1)) (.cse1 (+ main_~i~0 1))) (and (<= .cse0 .cse1) (<= .cse0 .cse2) (<= .cse1 .cse0) (<= .cse2 .cse0) (<= .cse1 .cse3))) (let ((.cse4 (+ |main_#t~post1| 2)) (.cse5 (+ main_~i~0 2))) (and (<= .cse4 .cse3) (<= .cse5 .cse0) (<= .cse0 .cse4) (<= .cse4 .cse0) (<= .cse0 .cse5))))) [2020-08-22 23:05:48,383 INFO L264 CegarLoopResult]: At program point L18-5(line 18) the Hoare annotation is: (let ((.cse0 (* 2 main_~n~0))) (or (let ((.cse1 (+ |main_#t~post1| 1))) (and (<= .cse0 .cse1) (<= .cse0 main_~i~0) (<= main_~i~0 .cse0) (<= .cse1 .cse0) (< main_~n~0 (+ main_~k~0 1)))) (let ((.cse3 (+ |main_#t~post1| 2)) (.cse2 (+ main_~i~0 1))) (and (<= .cse0 .cse2) (<= .cse2 .cse0) (<= .cse0 .cse3) (<= .cse3 .cse0) (<= .cse2 (* 2 main_~k~0)))))) [2020-08-22 23:05:48,383 INFO L264 CegarLoopResult]: At program point L18-6(lines 18 22) the Hoare annotation is: (let ((.cse1 (* 2 main_~n~0))) (let ((.cse0 (<= main_~i~0 .cse1))) (or (and (<= main_~n~0 0) (<= 0 main_~i~0) .cse0) (let ((.cse2 (+ main_~i~0 1))) (and (<= .cse1 .cse2) (<= .cse2 .cse1) (<= .cse2 (* 2 main_~k~0)))) (and (<= .cse1 main_~i~0) .cse0 (< main_~n~0 (+ main_~k~0 1)))))) [2020-08-22 23:05:48,383 INFO L264 CegarLoopResult]: At program point L18-7(lines 18 22) the Hoare annotation is: (let ((.cse0 (<= main_~k~0 main_~n~0))) (or (and (<= 0 main_~n~0) (<= main_~n~0 0) (<= main_~i~0 (+ (* 2 main_~n~0) 1)) .cse0) (and .cse0 (< main_~n~0 (+ main_~k~0 1))))) [2020-08-22 23:05:48,384 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:48,384 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:48,384 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:48,384 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 23:05:48,384 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-08-22 23:05:48,385 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-08-22 23:05:48,411 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 11:05:48 BoogieIcfgContainer [2020-08-22 23:05:48,412 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 23:05:48,415 INFO L168 Benchmark]: Toolchain (without parser) took 5325.57 ms. Allocated memory was 140.5 MB in the beginning and 272.6 MB in the end (delta: 132.1 MB). Free memory was 103.3 MB in the beginning and 177.5 MB in the end (delta: -74.2 MB). Peak memory consumption was 106.3 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:48,416 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 23:05:48,417 INFO L168 Benchmark]: CACSL2BoogieTranslator took 242.40 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:48,418 INFO L168 Benchmark]: Boogie Preprocessor took 114.47 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 93.5 MB in the beginning and 183.6 MB in the end (delta: -90.1 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:48,419 INFO L168 Benchmark]: RCFGBuilder took 281.27 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 169.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:48,420 INFO L168 Benchmark]: TraceAbstraction took 4681.94 ms. Allocated memory was 204.5 MB in the beginning and 272.6 MB in the end (delta: 68.2 MB). Free memory was 169.1 MB in the beginning and 177.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 108.1 MB. Max. memory is 7.1 GB. [2020-08-22 23:05:48,425 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 242.40 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 93.5 MB in the end (delta: 9.6 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 114.47 ms. Allocated memory was 140.5 MB in the beginning and 204.5 MB in the end (delta: 64.0 MB). Free memory was 93.5 MB in the beginning and 183.6 MB in the end (delta: -90.1 MB). Peak memory consumption was 14.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 281.27 ms. Allocated memory is still 204.5 MB. Free memory was 183.2 MB in the beginning and 169.7 MB in the end (delta: 13.4 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4681.94 ms. Allocated memory was 204.5 MB in the beginning and 272.6 MB in the end (delta: 68.2 MB). Free memory was 169.1 MB in the beginning and 177.5 MB in the end (delta: -8.4 MB). Peak memory consumption was 108.1 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: 18]: Loop Invariant Derived loop invariant: (((n <= 0 && 0 <= i) && i <= 2 * n) || ((2 * n <= i + 1 && i + 1 <= 2 * n) && i + 1 <= 2 * k)) || ((2 * n <= i && i <= 2 * n) && n < k + 1) - 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: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.8s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.6s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 147 SDslu, 617 SDs, 0 SdLazy, 631 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=51occurred in iteration=6, 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, 7 MinimizatonAttempts, 46 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 32 LocationsWithAnnotation, 80 PreInvPairs, 132 NumberOfFragments, 482 HoareAnnotationTreeSize, 80 FomulaSimplifications, 958 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 32 FomulaSimplificationsInter, 702 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 185 NumberOfCodeBlocks, 185 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 178 ConstructedInterpolants, 0 QuantifiedInterpolants, 40304 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 2 PerfectInterpolantSequences, 9/67 InterpolantCoveringCapability, 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...