/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 0.1.25-3af5e1f [2020-09-04 23:15:26,919 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-04 23:15:26,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-04 23:15:26,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-04 23:15:26,950 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-04 23:15:26,951 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-04 23:15:26,953 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-04 23:15:26,955 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-04 23:15:26,957 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-04 23:15:26,958 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-04 23:15:26,959 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-04 23:15:26,960 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-04 23:15:26,961 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-04 23:15:26,962 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-04 23:15:26,963 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-04 23:15:26,964 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-04 23:15:26,966 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-04 23:15:26,967 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-04 23:15:26,969 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-04 23:15:26,973 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-04 23:15:26,975 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-04 23:15:26,978 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-04 23:15:26,980 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-04 23:15:26,982 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-04 23:15:26,987 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-04 23:15:27,003 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-04 23:15:27,004 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-04 23:15:27,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-04 23:15:27,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-09-04 23:15:27,045 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-04 23:15:27,045 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-04 23:15:27,047 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-04 23:15:27,047 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-04 23:15:27,047 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-04 23:15:27,047 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-04 23:15:27,048 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-04 23:15:27,048 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-04 23:15:27,048 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-04 23:15:27,048 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-04 23:15:27,048 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-04 23:15:27,049 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-04 23:15:27,049 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-04 23:15:27,049 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-04 23:15:27,049 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-04 23:15:27,049 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-09-04 23:15:27,050 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-04 23:15:27,051 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-04 23:15:27,051 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-04 23:15:27,051 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-04 23:15:27,051 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-09-04 23:15:27,052 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-04 23:15:27,052 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 [2020-09-04 23:15:27,563 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-04 23:15:27,586 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-04 23:15:27,590 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-04 23:15:27,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-04 23:15:27,592 INFO L275 PluginConnector]: CDTParser initialized [2020-09-04 23:15:27,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/half.i [2020-09-04 23:15:27,682 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/343c3c2c3/9613218162b24bbd86add5c37c8c7f9b/FLAGa8ad6c9ce [2020-09-04 23:15:28,308 INFO L306 CDTParser]: Found 1 translation units. [2020-09-04 23:15:28,309 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/half.i [2020-09-04 23:15:28,316 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/343c3c2c3/9613218162b24bbd86add5c37c8c7f9b/FLAGa8ad6c9ce [2020-09-04 23:15:28,653 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/343c3c2c3/9613218162b24bbd86add5c37c8c7f9b [2020-09-04 23:15:28,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-04 23:15:28,672 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-04 23:15:28,673 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-04 23:15:28,674 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-04 23:15:28,678 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-04 23:15:28,680 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:15:28" (1/1) ... [2020-09-04 23:15:28,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@138a7dd5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:28, skipping insertion in model container [2020-09-04 23:15:28,686 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.09 11:15:28" (1/1) ... [2020-09-04 23:15:28,696 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-04 23:15:28,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-04 23:15:28,960 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:15:28,967 INFO L203 MainTranslator]: Completed pre-run [2020-09-04 23:15:28,988 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-04 23:15:29,006 INFO L208 MainTranslator]: Completed translation [2020-09-04 23:15:29,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29 WrapperNode [2020-09-04 23:15:29,007 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-04 23:15:29,007 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-04 23:15:29,008 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-04 23:15:29,008 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-04 23:15:29,023 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (1/1) ... [2020-09-04 23:15:29,023 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (1/1) ... [2020-09-04 23:15:29,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (1/1) ... [2020-09-04 23:15:29,030 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (1/1) ... [2020-09-04 23:15:29,034 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (1/1) ... [2020-09-04 23:15:29,042 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (1/1) ... [2020-09-04 23:15:29,043 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (1/1) ... [2020-09-04 23:15:29,045 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-04 23:15:29,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-04 23:15:29,046 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-04 23:15:29,046 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-04 23:15:29,050 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-04 23:15:29,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-04 23:15:29,225 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-04 23:15:29,226 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-04 23:15:29,226 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-04 23:15:29,226 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-04 23:15:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-04 23:15:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-04 23:15:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-04 23:15:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-04 23:15:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-04 23:15:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-04 23:15:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-04 23:15:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-04 23:15:29,510 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-04 23:15:29,510 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-04 23:15:29,519 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:15:29 BoogieIcfgContainer [2020-09-04 23:15:29,519 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-04 23:15:29,521 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-04 23:15:29,521 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-04 23:15:29,527 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-04 23:15:29,527 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.09 11:15:28" (1/3) ... [2020-09-04 23:15:29,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dc3dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:15:29, skipping insertion in model container [2020-09-04 23:15:29,529 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.09 11:15:29" (2/3) ... [2020-09-04 23:15:29,529 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78dc3dfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.09 11:15:29, skipping insertion in model container [2020-09-04 23:15:29,530 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 04.09 11:15:29" (3/3) ... [2020-09-04 23:15:29,532 INFO L109 eAbstractionObserver]: Analyzing ICFG half.i [2020-09-04 23:15:29,550 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-04 23:15:29,562 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-04 23:15:29,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-04 23:15:29,637 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-04 23:15:29,638 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-04 23:15:29,638 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-04 23:15:29,638 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-04 23:15:29,638 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-04 23:15:29,638 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-04 23:15:29,638 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-04 23:15:29,639 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-04 23:15:29,659 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states. [2020-09-04 23:15:29,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 23:15:29,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:29,677 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:29,678 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:29,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash 789700725, now seen corresponding path program 1 times [2020-09-04 23:15:29,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:29,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163929831] [2020-09-04 23:15:29,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:29,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:29,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:29,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:29,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163929831] [2020-09-04 23:15:29,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:15:29,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-04 23:15:29,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248375287] [2020-09-04 23:15:29,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-04 23:15:29,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:29,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-04 23:15:29,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-04 23:15:29,912 INFO L87 Difference]: Start difference. First operand 32 states. Second operand 2 states. [2020-09-04 23:15:29,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:29,945 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2020-09-04 23:15:29,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-04 23:15:29,946 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 16 [2020-09-04 23:15:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:29,957 INFO L225 Difference]: With dead ends: 44 [2020-09-04 23:15:29,957 INFO L226 Difference]: Without dead ends: 24 [2020-09-04 23:15:29,961 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 [2020-09-04 23:15:29,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-04 23:15:30,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-09-04 23:15:30,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-04 23:15:30,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-04 23:15:30,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2020-09-04 23:15:30,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:30,009 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-04 23:15:30,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-04 23:15:30,009 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-04 23:15:30,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-04 23:15:30,010 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:30,010 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-04 23:15:30,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-04 23:15:30,011 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:30,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:30,011 INFO L82 PathProgramCache]: Analyzing trace with hash 774924389, now seen corresponding path program 1 times [2020-09-04 23:15:30,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:30,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250537955] [2020-09-04 23:15:30,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:30,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:30,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:30,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:30,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:30,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250537955] [2020-09-04 23:15:30,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-04 23:15:30,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-04 23:15:30,225 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902313706] [2020-09-04 23:15:30,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-04 23:15:30,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:30,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-04 23:15:30,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-04 23:15:30,228 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 7 states. [2020-09-04 23:15:30,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:30,430 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2020-09-04 23:15:30,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-04 23:15:30,430 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2020-09-04 23:15:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:30,435 INFO L225 Difference]: With dead ends: 43 [2020-09-04 23:15:30,435 INFO L226 Difference]: Without dead ends: 38 [2020-09-04 23:15:30,437 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 [2020-09-04 23:15:30,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-04 23:15:30,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 25. [2020-09-04 23:15:30,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-04 23:15:30,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-04 23:15:30,449 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 16 [2020-09-04 23:15:30,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:30,449 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-04 23:15:30,449 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-04 23:15:30,450 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-04 23:15:30,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-04 23:15:30,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:30,451 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] [2020-09-04 23:15:30,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-04 23:15:30,452 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:30,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:30,452 INFO L82 PathProgramCache]: Analyzing trace with hash 775379929, now seen corresponding path program 1 times [2020-09-04 23:15:30,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:30,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [587601605] [2020-09-04 23:15:30,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:30,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:30,657 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [587601605] [2020-09-04 23:15:30,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:30,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-04 23:15:30,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815587880] [2020-09-04 23:15:30,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-04 23:15:30,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:30,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-04 23:15:30,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-04 23:15:30,660 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 9 states. [2020-09-04 23:15:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:30,945 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2020-09-04 23:15:30,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-04 23:15:30,946 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 21 [2020-09-04 23:15:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:30,947 INFO L225 Difference]: With dead ends: 48 [2020-09-04 23:15:30,948 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 23:15:30,949 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 [2020-09-04 23:15:30,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 23:15:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 30. [2020-09-04 23:15:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-09-04 23:15:30,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-09-04 23:15:30,961 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-09-04 23:15:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:30,961 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-09-04 23:15:30,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-04 23:15:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-09-04 23:15:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-04 23:15:30,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:30,966 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] [2020-09-04 23:15:30,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-04 23:15:30,967 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:30,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:30,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1973531292, now seen corresponding path program 1 times [2020-09-04 23:15:30,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:30,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929642786] [2020-09-04 23:15:30,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:31,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:31,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:31,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929642786] [2020-09-04 23:15:31,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:31,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-04 23:15:31,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542643697] [2020-09-04 23:15:31,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-04 23:15:31,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:31,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-04 23:15:31,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-04 23:15:31,139 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 6 states. [2020-09-04 23:15:31,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:31,259 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2020-09-04 23:15:31,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-04 23:15:31,260 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-09-04 23:15:31,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:31,261 INFO L225 Difference]: With dead ends: 58 [2020-09-04 23:15:31,261 INFO L226 Difference]: Without dead ends: 41 [2020-09-04 23:15:31,262 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 [2020-09-04 23:15:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-09-04 23:15:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 34. [2020-09-04 23:15:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-04 23:15:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-09-04 23:15:31,271 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 24 [2020-09-04 23:15:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:31,271 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-09-04 23:15:31,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-04 23:15:31,272 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-09-04 23:15:31,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-04 23:15:31,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:31,273 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] [2020-09-04 23:15:31,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-04 23:15:31,274 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:31,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:31,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1981883390, now seen corresponding path program 1 times [2020-09-04 23:15:31,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:31,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669701981] [2020-09-04 23:15:31,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:31,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:31,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:31,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:31,672 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:31,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669701981] [2020-09-04 23:15:31,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:31,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-04 23:15:31,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223633757] [2020-09-04 23:15:31,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-04 23:15:31,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:31,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-04 23:15:31,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-09-04 23:15:31,675 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand 14 states. [2020-09-04 23:15:32,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:32,199 INFO L93 Difference]: Finished difference Result 67 states and 73 transitions. [2020-09-04 23:15:32,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-04 23:15:32,200 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 29 [2020-09-04 23:15:32,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:32,201 INFO L225 Difference]: With dead ends: 67 [2020-09-04 23:15:32,201 INFO L226 Difference]: Without dead ends: 43 [2020-09-04 23:15:32,202 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 [2020-09-04 23:15:32,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-04 23:15:32,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2020-09-04 23:15:32,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-04 23:15:32,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-09-04 23:15:32,212 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 29 [2020-09-04 23:15:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:32,213 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-09-04 23:15:32,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-04 23:15:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-09-04 23:15:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-09-04 23:15:32,214 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:32,215 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] [2020-09-04 23:15:32,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-04 23:15:32,215 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:32,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:32,216 INFO L82 PathProgramCache]: Analyzing trace with hash -282773191, now seen corresponding path program 2 times [2020-09-04 23:15:32,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:32,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860569926] [2020-09-04 23:15:32,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:32,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:32,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:32,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-04 23:15:32,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860569926] [2020-09-04 23:15:32,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:32,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-04 23:15:32,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033902630] [2020-09-04 23:15:32,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-04 23:15:32,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:32,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-04 23:15:32,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-09-04 23:15:32,418 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 10 states. [2020-09-04 23:15:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:32,945 INFO L93 Difference]: Finished difference Result 65 states and 71 transitions. [2020-09-04 23:15:32,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-04 23:15:32,952 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-09-04 23:15:32,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:32,954 INFO L225 Difference]: With dead ends: 65 [2020-09-04 23:15:32,954 INFO L226 Difference]: Without dead ends: 60 [2020-09-04 23:15:32,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-09-04 23:15:32,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-04 23:15:32,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 51. [2020-09-04 23:15:32,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-04 23:15:32,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-09-04 23:15:32,975 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 37 [2020-09-04 23:15:32,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:32,976 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-09-04 23:15:32,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-04 23:15:32,976 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-09-04 23:15:32,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-04 23:15:32,977 INFO L414 BasicCegarLoop]: Found error trace [2020-09-04 23:15:32,978 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] [2020-09-04 23:15:32,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-04 23:15:32,980 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-04 23:15:32,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-04 23:15:32,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1065873285, now seen corresponding path program 3 times [2020-09-04 23:15:32,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-04 23:15:32,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523963411] [2020-09-04 23:15:32,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-04 23:15:33,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:33,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-04 23:15:33,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-04 23:15:33,387 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-04 23:15:33,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523963411] [2020-09-04 23:15:33,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-04 23:15:33,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-04 23:15:33,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496730005] [2020-09-04 23:15:33,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-04 23:15:33,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-04 23:15:33,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-04 23:15:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2020-09-04 23:15:33,394 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 15 states. [2020-09-04 23:15:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-04 23:15:33,975 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-09-04 23:15:33,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-04 23:15:33,978 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 42 [2020-09-04 23:15:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-04 23:15:33,979 INFO L225 Difference]: With dead ends: 71 [2020-09-04 23:15:33,979 INFO L226 Difference]: Without dead ends: 0 [2020-09-04 23:15:33,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=106, Invalid=650, Unknown=0, NotChecked=0, Total=756 [2020-09-04 23:15:33,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-04 23:15:33,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-04 23:15:33,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-04 23:15:33,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-04 23:15:33,983 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 42 [2020-09-04 23:15:33,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-04 23:15:33,983 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-04 23:15:33,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-04 23:15:33,984 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-04 23:15:33,984 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-04 23:15:33,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-04 23:15:33,988 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-04 23:15:34,609 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 25 [2020-09-04 23:15:34,862 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:15:34,862 INFO L271 CegarLoopResult]: At program point ULTIMATE.initEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:15:34,863 INFO L271 CegarLoopResult]: At program point ULTIMATE.startEXIT(line -1) the Hoare annotation is: true [2020-09-04 23:15:34,863 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-04 23:15:34,863 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-04 23:15:34,863 INFO L271 CegarLoopResult]: At program point ULTIMATE.startFINAL(line -1) the Hoare annotation is: true [2020-09-04 23:15:34,863 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:15:34,863 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:15:34,864 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-04 23:15:34,864 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-04 23:15:34,864 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-04 23:15:34,865 INFO L271 CegarLoopResult]: At program point mainEXIT(lines 13 25) the Hoare annotation is: true [2020-09-04 23:15:34,865 INFO L271 CegarLoopResult]: At program point L23(line 23) the Hoare annotation is: true [2020-09-04 23:15:34,865 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)))) [2020-09-04 23:15:34,866 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)) [2020-09-04 23:15:34,867 INFO L271 CegarLoopResult]: At program point L17-1(line 17) the Hoare annotation is: true [2020-09-04 23:15:34,867 INFO L264 CegarLoopResult]: At program point L15(line 15) the Hoare annotation is: (and (<= main_~i~0 0) (<= 0 main_~i~0)) [2020-09-04 23:15:34,868 INFO L271 CegarLoopResult]: At program point mainFINAL(lines 13 25) the Hoare annotation is: true [2020-09-04 23:15:34,868 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 25) the Hoare annotation is: true [2020-09-04 23:15:34,868 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))) [2020-09-04 23:15:34,868 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))) [2020-09-04 23:15:34,868 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)) [2020-09-04 23:15:34,869 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))) [2020-09-04 23:15:34,869 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)) [2020-09-04 23:15:34,869 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)) [2020-09-04 23:15:34,869 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))))) [2020-09-04 23:15:34,870 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)) [2020-09-04 23:15:34,870 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))))) [2020-09-04 23:15:34,870 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)))))) [2020-09-04 23:15:34,871 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)))))) [2020-09-04 23:15:34,871 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))))) [2020-09-04 23:15:34,871 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-04 23:15:34,871 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertEXIT(lines 6 11) the Hoare annotation is: true [2020-09-04 23:15:34,872 INFO L264 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:15:34,872 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))) [2020-09-04 23:15:34,872 INFO L271 CegarLoopResult]: At program point L7-2(lines 6 11) the Hoare annotation is: true [2020-09-04 23:15:34,872 INFO L264 CegarLoopResult]: At program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) the Hoare annotation is: (= |__VERIFIER_assert_#in~cond| 0) [2020-09-04 23:15:34,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 04.09 11:15:34 BoogieIcfgContainer [2020-09-04 23:15:34,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-04 23:15:34,922 INFO L168 Benchmark]: Toolchain (without parser) took 6248.95 ms. Allocated memory was 136.8 MB in the beginning and 289.4 MB in the end (delta: 152.6 MB). Free memory was 101.1 MB in the beginning and 236.7 MB in the end (delta: -135.6 MB). Peak memory consumption was 125.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:34,928 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-04 23:15:34,929 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.68 ms. Allocated memory is still 136.8 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:34,930 INFO L168 Benchmark]: Boogie Preprocessor took 38.18 ms. Allocated memory is still 136.8 MB. Free memory was 91.4 MB in the beginning and 89.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:34,932 INFO L168 Benchmark]: RCFGBuilder took 473.68 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 89.8 MB in the beginning and 165.8 MB in the end (delta: -76.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:34,933 INFO L168 Benchmark]: TraceAbstraction took 5397.20 ms. Allocated memory was 200.3 MB in the beginning and 289.4 MB in the end (delta: 89.1 MB). Free memory was 165.1 MB in the beginning and 236.7 MB in the end (delta: -71.6 MB). Peak memory consumption was 126.0 MB. Max. memory is 7.1 GB. [2020-09-04 23:15:34,947 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 136.8 MB. Free memory was 119.4 MB in the beginning and 119.2 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.68 ms. Allocated memory is still 136.8 MB. Free memory was 100.9 MB in the beginning and 91.4 MB in the end (delta: 9.5 MB). Peak memory consumption was 9.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 38.18 ms. Allocated memory is still 136.8 MB. Free memory was 91.4 MB in the beginning and 89.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 473.68 ms. Allocated memory was 136.8 MB in the beginning and 200.3 MB in the end (delta: 63.4 MB). Free memory was 89.8 MB in the beginning and 165.8 MB in the end (delta: -76.0 MB). Peak memory consumption was 13.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 5397.20 ms. Allocated memory was 200.3 MB in the beginning and 289.4 MB in the end (delta: 89.1 MB). Free memory was 165.1 MB in the beginning and 236.7 MB in the end (delta: -71.6 MB). Peak memory consumption was 126.0 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: 4.3s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.8s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 147 SDslu, 617 SDs, 0 SdLazy, 631 SolverSat, 48 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 135 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.1s 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, 0.2s HoareSimplificationTime, 32 FomulaSimplificationsInter, 702 FormulaSimplificationTreeSizeReductionInter, 0.5s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.4s 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...