/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 01:17:03,331 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-08-19 01:17:03,377 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 01:17:03,386 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 01:17:03,389 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 01:17:03,392 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 01:17:03,395 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 01:17:03,398 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 01:17:03,399 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 01:17:03,400 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 01:17:03,400 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 01:17:03,402 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 01:17:03,405 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 01:17:03,406 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 01:17:03,408 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 01:17:03,409 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 01:17:03,411 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 01:17:03,420 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 01:17:03,423 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 01:17:03,423 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 01:17:03,424 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 01:17:03,425 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 01:17:03,437 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 01:17:03,453 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 01:17:03,456 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 01:17:03,457 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 01:17:03,458 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 01:17:03,495 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 01:17:03,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 01:17:03,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 01:17:03,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 01:17:03,497 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 01:17:03,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 01:17:03,498 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 01:17:03,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 01:17:03,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 01:17:03,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 01:17:03,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 01:17:03,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 01:17:03,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 01:17:03,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 01:17:03,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 01:17:03,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 01:17:03,502 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 01:17:03,502 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 01:17:03,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 01:17:03,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 01:17:03,503 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 01:17:03,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 01:17:03,503 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 01:17:03,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 01:17:03,504 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 01:17:03,504 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 01:17:03,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 01:17:03,504 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 01:17:03,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 01:17:03,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6; [2020-08-19 01:17:03,838 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 01:17:03,853 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 01:17:03,860 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 01:17:03,861 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 01:17:03,862 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 01:17:03,862 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2020-08-19 01:17:03,922 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f562904f/8c1baa22bab84c2aa7d685ce0bb78d97/FLAG0d338465f [2020-08-19 01:17:04,420 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 01:17:04,421 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-invgen/nested6.i [2020-08-19 01:17:04,428 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f562904f/8c1baa22bab84c2aa7d685ce0bb78d97/FLAG0d338465f [2020-08-19 01:17:04,833 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2f562904f/8c1baa22bab84c2aa7d685ce0bb78d97 [2020-08-19 01:17:04,843 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 01:17:04,845 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 01:17:04,848 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 01:17:04,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 01:17:04,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 01:17:04,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:17:04" (1/1) ... [2020-08-19 01:17:04,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@583c8316 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:04, skipping insertion in model container [2020-08-19 01:17:04,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 01:17:04" (1/1) ... [2020-08-19 01:17:04,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 01:17:04,884 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 01:17:05,045 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:17:05,049 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 01:17:05,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 01:17:05,080 INFO L208 MainTranslator]: Completed translation [2020-08-19 01:17:05,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05 WrapperNode [2020-08-19 01:17:05,081 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 01:17:05,082 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 01:17:05,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 01:17:05,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 01:17:05,091 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (1/1) ... [2020-08-19 01:17:05,091 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (1/1) ... [2020-08-19 01:17:05,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (1/1) ... [2020-08-19 01:17:05,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (1/1) ... [2020-08-19 01:17:05,178 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (1/1) ... [2020-08-19 01:17:05,185 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (1/1) ... [2020-08-19 01:17:05,186 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (1/1) ... [2020-08-19 01:17:05,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 01:17:05,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 01:17:05,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 01:17:05,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 01:17:05,189 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (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 [2020-08-19 01:17:05,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 01:17:05,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 01:17:05,250 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-19 01:17:05,250 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 01:17:05,250 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 01:17:05,250 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 01:17:05,251 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-19 01:17:05,251 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-19 01:17:05,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 01:17:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 01:17:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 01:17:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 01:17:05,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 01:17:05,485 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 01:17:05,485 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-19 01:17:05,489 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:17:05 BoogieIcfgContainer [2020-08-19 01:17:05,489 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 01:17:05,491 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 01:17:05,491 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 01:17:05,494 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 01:17:05,494 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 01:17:04" (1/3) ... [2020-08-19 01:17:05,495 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6275e7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:17:05, skipping insertion in model container [2020-08-19 01:17:05,495 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 01:17:05" (2/3) ... [2020-08-19 01:17:05,496 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6275e7c0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 01:17:05, skipping insertion in model container [2020-08-19 01:17:05,496 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 01:17:05" (3/3) ... [2020-08-19 01:17:05,497 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2020-08-19 01:17:05,509 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 01:17:05,516 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 01:17:05,531 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 01:17:05,558 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 01:17:05,559 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 01:17:05,559 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 01:17:05,559 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 01:17:05,559 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 01:17:05,559 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 01:17:05,559 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 01:17:05,560 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 01:17:05,586 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-08-19 01:17:05,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-19 01:17:05,598 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:17:05,602 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:17:05,602 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:17:05,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:17:05,612 INFO L82 PathProgramCache]: Analyzing trace with hash 404168940, now seen corresponding path program 1 times [2020-08-19 01:17:05,625 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:17:05,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822227770] [2020-08-19 01:17:05,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:17:05,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:05,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:17:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:05,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:17:05,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822227770] [2020-08-19 01:17:05,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:17:05,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:17:05,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66088284] [2020-08-19 01:17:05,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:17:05,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:17:05,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:17:05,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:17:05,895 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 5 states. [2020-08-19 01:17:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:17:06,027 INFO L93 Difference]: Finished difference Result 57 states and 80 transitions. [2020-08-19 01:17:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:17:06,029 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-08-19 01:17:06,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:17:06,040 INFO L225 Difference]: With dead ends: 57 [2020-08-19 01:17:06,040 INFO L226 Difference]: Without dead ends: 28 [2020-08-19 01:17:06,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:17:06,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-19 01:17:06,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-08-19 01:17:06,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-19 01:17:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-19 01:17:06,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 15 [2020-08-19 01:17:06,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:17:06,088 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-19 01:17:06,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:17:06,088 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-19 01:17:06,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 01:17:06,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:17:06,090 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:17:06,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 01:17:06,091 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:17:06,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:17:06,091 INFO L82 PathProgramCache]: Analyzing trace with hash -849304486, now seen corresponding path program 1 times [2020-08-19 01:17:06,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:17:06,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1802276288] [2020-08-19 01:17:06,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:17:06,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:17:06,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:17:06,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1802276288] [2020-08-19 01:17:06,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:17:06,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 01:17:06,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599075518] [2020-08-19 01:17:06,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:17:06,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:17:06,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:17:06,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:17:06,201 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-19 01:17:06,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:17:06,356 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-08-19 01:17:06,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:17:06,357 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-08-19 01:17:06,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:17:06,358 INFO L225 Difference]: With dead ends: 40 [2020-08-19 01:17:06,359 INFO L226 Difference]: Without dead ends: 38 [2020-08-19 01:17:06,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:17:06,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-19 01:17:06,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 32. [2020-08-19 01:17:06,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-08-19 01:17:06,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-08-19 01:17:06,370 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 16 [2020-08-19 01:17:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:17:06,371 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-08-19 01:17:06,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:17:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-08-19 01:17:06,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 01:17:06,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:17:06,373 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:17:06,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 01:17:06,374 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:17:06,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:17:06,374 INFO L82 PathProgramCache]: Analyzing trace with hash -1573212483, now seen corresponding path program 1 times [2020-08-19 01:17:06,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:17:06,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402502483] [2020-08-19 01:17:06,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:17:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:17:06,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-08-19 01:17:06,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:17:06,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402502483] [2020-08-19 01:17:06,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:17:06,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:17:06,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866930235] [2020-08-19 01:17:06,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:17:06,477 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:17:06,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:17:06,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:17:06,478 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 5 states. [2020-08-19 01:17:06,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:17:06,573 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-08-19 01:17:06,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 01:17:06,574 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-19 01:17:06,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:17:06,576 INFO L225 Difference]: With dead ends: 45 [2020-08-19 01:17:06,576 INFO L226 Difference]: Without dead ends: 43 [2020-08-19 01:17:06,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:17:06,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-08-19 01:17:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-08-19 01:17:06,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-19 01:17:06,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 49 transitions. [2020-08-19 01:17:06,589 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 49 transitions. Word has length 20 [2020-08-19 01:17:06,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:17:06,590 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 49 transitions. [2020-08-19 01:17:06,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:17:06,590 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 49 transitions. [2020-08-19 01:17:06,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-19 01:17:06,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:17:06,592 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:17:06,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 01:17:06,592 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:17:06,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:17:06,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1604756500, now seen corresponding path program 1 times [2020-08-19 01:17:06,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:17:06,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557128552] [2020-08-19 01:17:06,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:17:06,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:17:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-08-19 01:17:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 01:17:06,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557128552] [2020-08-19 01:17:06,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:17:06,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 01:17:06,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295815274] [2020-08-19 01:17:06,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 01:17:06,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:17:06,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 01:17:06,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 01:17:06,678 INFO L87 Difference]: Start difference. First operand 43 states and 49 transitions. Second operand 5 states. [2020-08-19 01:17:06,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:17:06,824 INFO L93 Difference]: Finished difference Result 97 states and 122 transitions. [2020-08-19 01:17:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:17:06,825 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-08-19 01:17:06,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:17:06,826 INFO L225 Difference]: With dead ends: 97 [2020-08-19 01:17:06,826 INFO L226 Difference]: Without dead ends: 62 [2020-08-19 01:17:06,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:17:06,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-19 01:17:06,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 46. [2020-08-19 01:17:06,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-19 01:17:06,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-19 01:17:06,840 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 24 [2020-08-19 01:17:06,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:17:06,841 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-19 01:17:06,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 01:17:06,841 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-19 01:17:06,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-19 01:17:06,842 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:17:06,842 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:17:06,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 01:17:06,843 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:17:06,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:17:06,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1598241856, now seen corresponding path program 1 times [2020-08-19 01:17:06,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:17:06,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366196669] [2020-08-19 01:17:06,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:17:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:17:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:17:06,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 01:17:06,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:06,935 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-19 01:17:06,936 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366196669] [2020-08-19 01:17:06,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:17:06,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 01:17:06,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135297626] [2020-08-19 01:17:06,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:17:06,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:17:06,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:17:06,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:17:06,938 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 6 states. [2020-08-19 01:17:07,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:17:07,017 INFO L93 Difference]: Finished difference Result 80 states and 93 transitions. [2020-08-19 01:17:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:17:07,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 31 [2020-08-19 01:17:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:17:07,019 INFO L225 Difference]: With dead ends: 80 [2020-08-19 01:17:07,020 INFO L226 Difference]: Without dead ends: 55 [2020-08-19 01:17:07,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:17:07,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-08-19 01:17:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-08-19 01:17:07,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-19 01:17:07,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2020-08-19 01:17:07,032 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 31 [2020-08-19 01:17:07,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:17:07,033 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2020-08-19 01:17:07,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:17:07,033 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2020-08-19 01:17:07,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-19 01:17:07,034 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:17:07,034 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1] [2020-08-19 01:17:07,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 01:17:07,035 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:17:07,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:17:07,035 INFO L82 PathProgramCache]: Analyzing trace with hash 2099424040, now seen corresponding path program 1 times [2020-08-19 01:17:07,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:17:07,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964380779] [2020-08-19 01:17:07,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:17:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:17:07,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:17:07,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 01:17:07,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-08-19 01:17:07,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964380779] [2020-08-19 01:17:07,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 01:17:07,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 01:17:07,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673842383] [2020-08-19 01:17:07,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 01:17:07,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:17:07,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 01:17:07,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-08-19 01:17:07,123 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand 8 states. [2020-08-19 01:17:07,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:17:07,358 INFO L93 Difference]: Finished difference Result 120 states and 153 transitions. [2020-08-19 01:17:07,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 01:17:07,359 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-08-19 01:17:07,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:17:07,360 INFO L225 Difference]: With dead ends: 120 [2020-08-19 01:17:07,361 INFO L226 Difference]: Without dead ends: 86 [2020-08-19 01:17:07,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-08-19 01:17:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-19 01:17:07,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 56. [2020-08-19 01:17:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-08-19 01:17:07,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 66 transitions. [2020-08-19 01:17:07,376 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 66 transitions. Word has length 34 [2020-08-19 01:17:07,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:17:07,376 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 66 transitions. [2020-08-19 01:17:07,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 01:17:07,376 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 66 transitions. [2020-08-19 01:17:07,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-19 01:17:07,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 01:17:07,378 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 01:17:07,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 01:17:07,379 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 01:17:07,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 01:17:07,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1702845076, now seen corresponding path program 2 times [2020-08-19 01:17:07,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 01:17:07,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [371944816] [2020-08-19 01:17:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 01:17:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 01:17:07,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 01:17:07,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 01:17:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 01:17:07,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 01:17:07,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-08-19 01:17:07,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [371944816] [2020-08-19 01:17:07,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 01:17:07,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 01:17:07,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45666606] [2020-08-19 01:17:07,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 01:17:07,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 01:17:07,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 01:17:07,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 01:17:07,453 INFO L87 Difference]: Start difference. First operand 56 states and 66 transitions. Second operand 6 states. [2020-08-19 01:17:07,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 01:17:07,535 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-08-19 01:17:07,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 01:17:07,536 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 38 [2020-08-19 01:17:07,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 01:17:07,537 INFO L225 Difference]: With dead ends: 56 [2020-08-19 01:17:07,537 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 01:17:07,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 01:17:07,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 01:17:07,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 01:17:07,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 01:17:07,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 01:17:07,539 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 38 [2020-08-19 01:17:07,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 01:17:07,540 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 01:17:07,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 01:17:07,540 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 01:17:07,540 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 01:17:07,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 01:17:07,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 01:17:07,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-19 01:17:07,966 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:17:07,966 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 01:17:07,966 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 01:17:07,966 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 01:17:07,967 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 01:17:07,967 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-19 01:17:07,967 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-19 01:17:07,967 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-19 01:17:07,967 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-19 01:17:07,967 INFO L268 CegarLoopResult]: For program point L31(lines 23 33) no Hoare annotation was computed. [2020-08-19 01:17:07,967 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 37) no Hoare annotation was computed. [2020-08-19 01:17:07,968 INFO L264 CegarLoopResult]: At program point L23-2(lines 23 33) the Hoare annotation is: (let ((.cse0 (<= (* 2 main_~i~0) main_~j~0)) (.cse1 (<= main_~n~0 main_~k~0))) (or (and .cse0 .cse1 (<= main_~k~0 main_~n~0)) (and (<= main_~k~0 (+ main_~i~0 1)) (<= main_~i~0 0) .cse0 .cse1 (<= main_~k~0 main_~j~0)))) [2020-08-19 01:17:07,968 INFO L268 CegarLoopResult]: For program point L24(lines 24 32) no Hoare annotation was computed. [2020-08-19 01:17:07,968 INFO L264 CegarLoopResult]: At program point L25-2(lines 25 27) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0))) [2020-08-19 01:17:07,968 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-08-19 01:17:07,968 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 37) no Hoare annotation was computed. [2020-08-19 01:17:07,969 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-08-19 01:17:07,969 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 37) the Hoare annotation is: true [2020-08-19 01:17:07,970 INFO L264 CegarLoopResult]: At program point L30-1(line 30) the Hoare annotation is: (and (<= (* 2 main_~i~0) main_~j~0) (<= main_~n~0 main_~k~0) (<= (+ main_~j~0 1) main_~n~0) (<= main_~k~0 main_~n~0)) [2020-08-19 01:17:07,970 INFO L264 CegarLoopResult]: At program point L26(line 26) the Hoare annotation is: (let ((.cse0 (* 2 main_~i~0))) (and (<= .cse0 main_~j~0) (<= .cse0 main_~k~0) (<= (+ main_~k~0 1) main_~n~0) (<= (+ main_~j~0 1) main_~n~0))) [2020-08-19 01:17:07,970 INFO L268 CegarLoopResult]: For program point L26-1(lines 25 27) no Hoare annotation was computed. [2020-08-19 01:17:07,970 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 34) no Hoare annotation was computed. [2020-08-19 01:17:07,970 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 34) the Hoare annotation is: (let ((.cse1 (<= main_~k~0 main_~n~0)) (.cse2 (<= main_~n~0 main_~j~0)) (.cse0 (<= main_~n~0 main_~k~0))) (or (and (<= main_~i~0 0) .cse0 .cse1) (and .cse2 .cse0 .cse1) (and .cse2 .cse0 (<= main_~k~0 main_~i~0)))) [2020-08-19 01:17:07,970 INFO L268 CegarLoopResult]: For program point L18(lines 18 21) no Hoare annotation was computed. [2020-08-19 01:17:07,970 INFO L268 CegarLoopResult]: For program point L18-1(lines 18 21) no Hoare annotation was computed. [2020-08-19 01:17:07,971 INFO L271 CegarLoopResult]: At program point L35(lines 13 37) the Hoare annotation is: true [2020-08-19 01:17:07,971 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-19 01:17:07,971 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-19 01:17:07,971 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-19 01:17:07,971 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-19 01:17:07,971 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-19 01:17:07,972 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-19 01:17:08,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 01:17:08 BoogieIcfgContainer [2020-08-19 01:17:08,005 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 01:17:08,010 INFO L168 Benchmark]: Toolchain (without parser) took 3162.15 ms. Allocated memory was 140.0 MB in the beginning and 245.4 MB in the end (delta: 105.4 MB). Free memory was 102.2 MB in the beginning and 204.5 MB in the end (delta: -102.3 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:17:08,016 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-19 01:17:08,018 INFO L168 Benchmark]: CACSL2BoogieTranslator took 233.08 ms. Allocated memory is still 140.0 MB. Free memory was 102.0 MB in the beginning and 91.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. [2020-08-19 01:17:08,019 INFO L168 Benchmark]: Boogie Preprocessor took 105.66 ms. Allocated memory was 140.0 MB in the beginning and 200.8 MB in the end (delta: 60.8 MB). Free memory was 91.9 MB in the beginning and 178.9 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. [2020-08-19 01:17:08,020 INFO L168 Benchmark]: RCFGBuilder took 301.72 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 164.5 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. [2020-08-19 01:17:08,021 INFO L168 Benchmark]: TraceAbstraction took 2514.43 ms. Allocated memory was 200.8 MB in the beginning and 245.4 MB in the end (delta: 44.6 MB). Free memory was 163.9 MB in the beginning and 204.5 MB in the end (delta: -40.6 MB). Peak memory consumption was 116.7 MB. Max. memory is 7.1 GB. [2020-08-19 01:17:08,034 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 233.08 ms. Allocated memory is still 140.0 MB. Free memory was 102.0 MB in the beginning and 91.9 MB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 105.66 ms. Allocated memory was 140.0 MB in the beginning and 200.8 MB in the end (delta: 60.8 MB). Free memory was 91.9 MB in the beginning and 178.9 MB in the end (delta: -86.9 MB). Peak memory consumption was 12.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 301.72 ms. Allocated memory is still 200.8 MB. Free memory was 178.9 MB in the beginning and 164.5 MB in the end (delta: 14.3 MB). Peak memory consumption was 14.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 2514.43 ms. Allocated memory was 200.8 MB in the beginning and 245.4 MB in the end (delta: 44.6 MB). Free memory was 163.9 MB in the beginning and 204.5 MB in the end (delta: -40.6 MB). Peak memory consumption was 116.7 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 25]: Loop Invariant Derived loop invariant: ((2 * i <= j && 2 * i <= k) && j + 1 <= n) && k <= n - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: (((i <= 0 && n <= k) && k <= n) || ((n <= j && n <= k) && k <= n)) || ((n <= j && n <= k) && k <= i) - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((2 * i <= j && n <= k) && k <= n) || ((((k <= i + 1 && i <= 0) && 2 * i <= j) && n <= k) && k <= j) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 33 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 1.9s, OverallIterations: 7, TraceHistogramMax: 4, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.4s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 186 SDtfs, 103 SDslu, 455 SDs, 0 SdLazy, 331 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred 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, 56 StatesRemovedByMinimization, 4 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 12 LocationsWithAnnotation, 33 PreInvPairs, 56 NumberOfFragments, 144 HoareAnnotationTreeSize, 33 FomulaSimplifications, 1712 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 12 FomulaSimplificationsInter, 516 FormulaSimplificationTreeSizeReductionInter, 0.3s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 178 NumberOfCodeBlocks, 178 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 171 ConstructedInterpolants, 0 QuantifiedInterpolants, 8319 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 52/56 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...