/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=DEEPEST -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 21:15:24,434 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 21:15:24,436 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 21:15:24,476 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 21:15:24,476 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 21:15:24,486 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 21:15:24,487 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 21:15:24,489 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 21:15:24,492 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 21:15:24,493 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 21:15:24,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 21:15:24,497 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 21:15:24,497 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 21:15:24,498 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 21:15:24,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 21:15:24,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 21:15:24,504 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 21:15:24,506 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 21:15:24,508 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 21:15:24,515 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 21:15:24,518 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 21:15:24,520 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 21:15:24,522 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 21:15:24,523 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 21:15:24,528 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 21:15:24,538 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 21:15:24,539 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 21:15:24,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 21:15:24,541 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 [2020-08-18 21:15:24,577 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 21:15:24,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 21:15:24,580 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 21:15:24,580 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 21:15:24,580 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 21:15:24,581 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 21:15:24,581 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 21:15:24,581 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 21:15:24,582 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 21:15:24,582 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 21:15:24,583 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 21:15:24,583 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 21:15:24,583 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 21:15:24,584 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 21:15:24,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 21:15:24,584 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 21:15:24,584 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 21:15:24,584 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 21:15:24,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 21:15:24,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 21:15:24,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 21:15:24,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 21:15:24,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 21:15:24,586 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 21:15:24,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 21:15:24,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 21:15:24,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 21:15:24,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 21:15:24,587 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 21:15:24,587 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=DEEPEST; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=DEEPEST; [2020-08-18 21:15:24,897 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 21:15:24,910 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 21:15:24,913 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 21:15:24,914 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 21:15:24,915 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 21:15:24,916 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-18 21:15:24,989 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6faeba28/279616b8d6c045fb9d5833404e614674/FLAGd7b9e3e16 [2020-08-18 21:15:25,456 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 21:15:25,456 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/sumt4.c [2020-08-18 21:15:25,463 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6faeba28/279616b8d6c045fb9d5833404e614674/FLAGd7b9e3e16 [2020-08-18 21:15:25,950 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/a6faeba28/279616b8d6c045fb9d5833404e614674 [2020-08-18 21:15:25,963 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 21:15:25,964 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 21:15:25,965 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 21:15:25,965 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 21:15:25,969 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 21:15:25,970 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:15:25" (1/1) ... [2020-08-18 21:15:25,973 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57d587f2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:25, skipping insertion in model container [2020-08-18 21:15:25,974 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 09:15:25" (1/1) ... [2020-08-18 21:15:25,982 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 21:15:26,000 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 21:15:26,195 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:15:26,203 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 21:15:26,230 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 21:15:26,242 INFO L208 MainTranslator]: Completed translation [2020-08-18 21:15:26,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26 WrapperNode [2020-08-18 21:15:26,243 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 21:15:26,244 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 21:15:26,244 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 21:15:26,244 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 21:15:26,254 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (1/1) ... [2020-08-18 21:15:26,254 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (1/1) ... [2020-08-18 21:15:26,342 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (1/1) ... [2020-08-18 21:15:26,343 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (1/1) ... [2020-08-18 21:15:26,352 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (1/1) ... [2020-08-18 21:15:26,360 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (1/1) ... [2020-08-18 21:15:26,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (1/1) ... [2020-08-18 21:15:26,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 21:15:26,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 21:15:26,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 21:15:26,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 21:15:26,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (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 [2020-08-18 21:15:26,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 21:15:26,434 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 21:15:26,434 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-08-18 21:15:26,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 21:15:26,434 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 21:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 21:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-08-18 21:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-08-18 21:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 21:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 21:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 21:15:26,435 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 21:15:26,436 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 21:15:26,666 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 21:15:26,666 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 21:15:26,670 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:15:26 BoogieIcfgContainer [2020-08-18 21:15:26,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 21:15:26,672 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 21:15:26,672 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 21:15:26,675 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 21:15:26,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 09:15:25" (1/3) ... [2020-08-18 21:15:26,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664726f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:15:26, skipping insertion in model container [2020-08-18 21:15:26,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 09:15:26" (2/3) ... [2020-08-18 21:15:26,677 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@664726f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 09:15:26, skipping insertion in model container [2020-08-18 21:15:26,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 09:15:26" (3/3) ... [2020-08-18 21:15:26,679 INFO L109 eAbstractionObserver]: Analyzing ICFG sumt4.c [2020-08-18 21:15:26,696 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 21:15:26,719 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 21:15:26,766 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 21:15:26,795 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 21:15:26,796 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 21:15:26,796 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 21:15:26,796 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 21:15:26,796 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 21:15:26,796 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 21:15:26,797 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 21:15:26,797 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 21:15:26,826 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states. [2020-08-18 21:15:26,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-08-18 21:15:26,832 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:26,834 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:26,834 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:26,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:26,840 INFO L82 PathProgramCache]: Analyzing trace with hash -12471351, now seen corresponding path program 1 times [2020-08-18 21:15:26,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:26,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605954884] [2020-08-18 21:15:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:26,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:27,318 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2020-08-18 21:15:27,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:27,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:27,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:27,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605954884] [2020-08-18 21:15:27,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:15:27,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:15:27,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788068264] [2020-08-18 21:15:27,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:15:27,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:27,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:15:27,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:15:27,438 INFO L87 Difference]: Start difference. First operand 24 states. Second operand 7 states. [2020-08-18 21:15:29,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:29,878 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2020-08-18 21:15:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:15:29,881 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-08-18 21:15:29,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:29,891 INFO L225 Difference]: With dead ends: 49 [2020-08-18 21:15:29,891 INFO L226 Difference]: Without dead ends: 22 [2020-08-18 21:15:29,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:15:29,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-08-18 21:15:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2020-08-18 21:15:29,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-18 21:15:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2020-08-18 21:15:29,941 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 12 [2020-08-18 21:15:29,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:29,942 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2020-08-18 21:15:29,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:15:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2020-08-18 21:15:29,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-08-18 21:15:29,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:29,944 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:29,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 21:15:29,945 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:29,945 INFO L82 PathProgramCache]: Analyzing trace with hash -793409467, now seen corresponding path program 1 times [2020-08-18 21:15:29,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:29,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [70062223] [2020-08-18 21:15:29,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:29,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:30,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:30,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:30,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [70062223] [2020-08-18 21:15:30,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:15:30,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 21:15:30,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740938537] [2020-08-18 21:15:30,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 21:15:30,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:30,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 21:15:30,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-18 21:15:30,597 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand 13 states. [2020-08-18 21:15:33,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:33,174 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2020-08-18 21:15:33,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 21:15:33,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-08-18 21:15:33,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:33,176 INFO L225 Difference]: With dead ends: 48 [2020-08-18 21:15:33,177 INFO L226 Difference]: Without dead ends: 35 [2020-08-18 21:15:33,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-08-18 21:15:33,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-08-18 21:15:33,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 21. [2020-08-18 21:15:33,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-08-18 21:15:33,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-08-18 21:15:33,186 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 15 [2020-08-18 21:15:33,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:33,186 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-08-18 21:15:33,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 21:15:33,187 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-08-18 21:15:33,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 21:15:33,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:33,188 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:33,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 21:15:33,188 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:33,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash 117019209, now seen corresponding path program 2 times [2020-08-18 21:15:33,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:33,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882782482] [2020-08-18 21:15:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:33,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:33,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:33,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882782482] [2020-08-18 21:15:33,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:15:33,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:15:33,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664827253] [2020-08-18 21:15:33,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:15:33,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:33,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:15:33,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:15:33,312 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-08-18 21:15:33,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:33,408 INFO L93 Difference]: Finished difference Result 35 states and 44 transitions. [2020-08-18 21:15:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:15:33,409 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-08-18 21:15:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:33,410 INFO L225 Difference]: With dead ends: 35 [2020-08-18 21:15:33,411 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 21:15:33,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:15:33,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 21:15:33,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-18 21:15:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-18 21:15:33,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-18 21:15:33,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 18 [2020-08-18 21:15:33,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:33,419 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-18 21:15:33,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:15:33,420 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-18 21:15:33,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-18 21:15:33,421 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:33,421 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:33,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 21:15:33,422 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:33,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:33,422 INFO L82 PathProgramCache]: Analyzing trace with hash -367783497, now seen corresponding path program 1 times [2020-08-18 21:15:33,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:33,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1572392972] [2020-08-18 21:15:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:33,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:33,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:33,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:33,647 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:33,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1572392972] [2020-08-18 21:15:33,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:15:33,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:15:33,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587703471] [2020-08-18 21:15:33,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:15:33,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:33,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:15:33,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:15:33,652 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-18 21:15:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:37,979 INFO L93 Difference]: Finished difference Result 34 states and 41 transitions. [2020-08-18 21:15:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:15:37,979 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-08-18 21:15:37,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:37,980 INFO L225 Difference]: With dead ends: 34 [2020-08-18 21:15:37,980 INFO L226 Difference]: Without dead ends: 24 [2020-08-18 21:15:37,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:15:37,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-08-18 21:15:37,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-08-18 21:15:37,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-08-18 21:15:37,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-08-18 21:15:37,991 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 19 [2020-08-18 21:15:37,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:37,991 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-08-18 21:15:37,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:15:37,991 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-08-18 21:15:37,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:15:37,993 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:37,993 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:37,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 21:15:37,994 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:37,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:37,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1925752910, now seen corresponding path program 1 times [2020-08-18 21:15:37,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:37,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083422230] [2020-08-18 21:15:37,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:38,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:38,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:38,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:38,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:38,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083422230] [2020-08-18 21:15:38,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:15:38,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 21:15:38,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051140308] [2020-08-18 21:15:38,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 21:15:38,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:38,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 21:15:38,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 21:15:38,114 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 5 states. [2020-08-18 21:15:38,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:38,220 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-08-18 21:15:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 21:15:38,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-08-18 21:15:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:38,222 INFO L225 Difference]: With dead ends: 35 [2020-08-18 21:15:38,222 INFO L226 Difference]: Without dead ends: 25 [2020-08-18 21:15:38,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:15:38,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-18 21:15:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2020-08-18 21:15:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-08-18 21:15:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-08-18 21:15:38,235 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2020-08-18 21:15:38,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:38,237 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-08-18 21:15:38,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 21:15:38,237 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-08-18 21:15:38,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 21:15:38,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:38,239 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:38,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 21:15:38,239 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:38,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:38,239 INFO L82 PathProgramCache]: Analyzing trace with hash -594207024, now seen corresponding path program 1 times [2020-08-18 21:15:38,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:38,241 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2040368253] [2020-08-18 21:15:38,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:39,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:39,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:39,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:39,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2040368253] [2020-08-18 21:15:39,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:15:39,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 21:15:39,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773407589] [2020-08-18 21:15:39,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 21:15:39,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:39,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 21:15:39,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-08-18 21:15:39,070 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 15 states. [2020-08-18 21:15:41,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:41,805 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-08-18 21:15:41,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 21:15:41,808 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 20 [2020-08-18 21:15:41,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:41,809 INFO L225 Difference]: With dead ends: 33 [2020-08-18 21:15:41,809 INFO L226 Difference]: Without dead ends: 28 [2020-08-18 21:15:41,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2020-08-18 21:15:41,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-08-18 21:15:41,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2020-08-18 21:15:41,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-08-18 21:15:41,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-08-18 21:15:41,817 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 20 [2020-08-18 21:15:41,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:41,818 INFO L479 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-08-18 21:15:41,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 21:15:41,818 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-08-18 21:15:41,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 21:15:41,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:41,819 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:41,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 21:15:41,819 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:41,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:41,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1087804450, now seen corresponding path program 2 times [2020-08-18 21:15:41,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:41,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [223596144] [2020-08-18 21:15:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:41,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:41,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:41,938 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:41,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [223596144] [2020-08-18 21:15:41,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:15:41,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:15:41,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907357798] [2020-08-18 21:15:41,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:15:41,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:41,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:15:41,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 21:15:41,941 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-08-18 21:15:42,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:42,057 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2020-08-18 21:15:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 21:15:42,058 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-08-18 21:15:42,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:42,058 INFO L225 Difference]: With dead ends: 40 [2020-08-18 21:15:42,059 INFO L226 Difference]: Without dead ends: 30 [2020-08-18 21:15:42,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-18 21:15:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-18 21:15:42,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-08-18 21:15:42,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-08-18 21:15:42,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-08-18 21:15:42,065 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 23 [2020-08-18 21:15:42,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:42,066 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-08-18 21:15:42,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:15:42,066 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-08-18 21:15:42,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 21:15:42,067 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:42,067 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:42,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 21:15:42,067 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:42,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:42,068 INFO L82 PathProgramCache]: Analyzing trace with hash 937388738, now seen corresponding path program 1 times [2020-08-18 21:15:42,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:42,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089631449] [2020-08-18 21:15:42,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:46,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:46,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:46,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 21:15:46,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089631449] [2020-08-18 21:15:46,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 21:15:46,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 21:15:46,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921884686] [2020-08-18 21:15:46,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 21:15:46,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:46,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 21:15:46,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=20, Unknown=1, NotChecked=0, Total=30 [2020-08-18 21:15:46,392 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 6 states. [2020-08-18 21:15:48,220 WARN L193 SmtUtils]: Spent 1.76 s on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2020-08-18 21:15:54,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:54,617 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-08-18 21:15:54,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 21:15:54,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-08-18 21:15:54,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:54,619 INFO L225 Difference]: With dead ends: 39 [2020-08-18 21:15:54,619 INFO L226 Difference]: Without dead ends: 29 [2020-08-18 21:15:54,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=28, Invalid=61, Unknown=1, NotChecked=0, Total=90 [2020-08-18 21:15:54,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-08-18 21:15:54,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-08-18 21:15:54,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-18 21:15:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-08-18 21:15:54,625 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 24 [2020-08-18 21:15:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:54,625 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-08-18 21:15:54,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 21:15:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-08-18 21:15:54,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 21:15:54,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 21:15:54,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 21:15:54,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 21:15:54,627 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 21:15:54,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 21:15:54,627 INFO L82 PathProgramCache]: Analyzing trace with hash -563580765, now seen corresponding path program 1 times [2020-08-18 21:15:54,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 21:15:54,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809799480] [2020-08-18 21:15:54,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 21:15:54,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 21:15:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 21:15:54,790 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-08-18 21:15:54,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809799480] [2020-08-18 21:15:54,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 21:15:54,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 21:15:54,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409628585] [2020-08-18 21:15:54,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 21:15:54,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 21:15:54,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 21:15:54,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 21:15:54,794 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 7 states. [2020-08-18 21:15:54,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 21:15:54,901 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2020-08-18 21:15:54,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 21:15:54,902 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-08-18 21:15:54,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 21:15:54,903 INFO L225 Difference]: With dead ends: 28 [2020-08-18 21:15:54,903 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 21:15:54,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-08-18 21:15:54,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 21:15:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 21:15:54,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 21:15:54,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 21:15:54,909 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-18 21:15:54,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 21:15:54,909 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 21:15:54,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 21:15:54,910 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 21:15:54,910 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 21:15:54,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 21:15:54,919 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 21:15:55,055 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:15:55,056 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (= ~SIZE~0 |old(~SIZE~0)|) [2020-08-18 21:15:55,056 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:15:55,056 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 21:15:55,056 INFO L264 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: (and (<= 20000001 ~SIZE~0) (<= ~SIZE~0 20000001)) [2020-08-18 21:15:55,056 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 21:15:55,057 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 21:15:55,057 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-08-18 21:15:55,057 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-08-18 21:15:55,057 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 5) no Hoare annotation was computed. [2020-08-18 21:15:55,057 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-08-18 21:15:55,057 INFO L268 CegarLoopResult]: For program point L31(line 31) no Hoare annotation was computed. [2020-08-18 21:15:55,058 INFO L268 CegarLoopResult]: For program point L25(lines 25 28) no Hoare annotation was computed. [2020-08-18 21:15:55,058 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 14 33) no Hoare annotation was computed. [2020-08-18 21:15:55,058 INFO L268 CegarLoopResult]: For program point L23(lines 23 28) no Hoare annotation was computed. [2020-08-18 21:15:55,058 INFO L268 CegarLoopResult]: For program point L25-2(lines 21 28) no Hoare annotation was computed. [2020-08-18 21:15:55,058 INFO L268 CegarLoopResult]: For program point L21(lines 21 28) no Hoare annotation was computed. [2020-08-18 21:15:55,059 INFO L264 CegarLoopResult]: At program point L19-2(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse0 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0))) (and (<= .cse0 main_~l~0) (<= main_~l~0 .cse0))) (not (<= 20000001 ~SIZE~0))) [2020-08-18 21:15:55,060 INFO L264 CegarLoopResult]: At program point L19-3(lines 19 30) the Hoare annotation is: (or (not (<= ~SIZE~0 20000001)) (let ((.cse1 (div main_~l~0 4294967296)) (.cse0 (div (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0) 4294967296))) (let ((.cse3 (+ (* 4294967296 .cse0) main_~l~0)) (.cse2 (* 4294967296 .cse1))) (and (< .cse0 (+ .cse1 1)) (<= (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2) .cse3) (< .cse3 (+ main_~i~0 main_~j~0 main_~k~0 main_~v4~0 .cse2 1))))) (not (<= 20000001 ~SIZE~0))) [2020-08-18 21:15:55,060 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 14 33) no Hoare annotation was computed. [2020-08-18 21:15:55,062 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 14 33) the Hoare annotation is: true [2020-08-18 21:15:55,062 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-08-18 21:15:55,063 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-08-18 21:15:55,063 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-08-18 21:15:55,063 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-08-18 21:15:55,063 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-08-18 21:15:55,063 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-08-18 21:15:55,064 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-08-18 21:15:55,089 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 09:15:55 BoogieIcfgContainer [2020-08-18 21:15:55,089 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 21:15:55,091 INFO L168 Benchmark]: Toolchain (without parser) took 29126.56 ms. Allocated memory was 141.6 MB in the beginning and 266.9 MB in the end (delta: 125.3 MB). Free memory was 102.6 MB in the beginning and 217.9 MB in the end (delta: -115.3 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:15:55,093 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. [2020-08-18 21:15:55,094 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.16 ms. Allocated memory is still 141.6 MB. Free memory was 102.4 MB in the beginning and 92.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. [2020-08-18 21:15:55,095 INFO L168 Benchmark]: Boogie Preprocessor took 127.00 ms. Allocated memory was 141.6 MB in the beginning and 201.9 MB in the end (delta: 60.3 MB). Free memory was 92.6 MB in the beginning and 179.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. [2020-08-18 21:15:55,101 INFO L168 Benchmark]: RCFGBuilder took 299.43 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 165.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. [2020-08-18 21:15:55,102 INFO L168 Benchmark]: TraceAbstraction took 28417.19 ms. Allocated memory was 201.9 MB in the beginning and 266.9 MB in the end (delta: 65.0 MB). Free memory was 165.2 MB in the beginning and 217.9 MB in the end (delta: -52.6 MB). Peak memory consumption was 12.4 MB. Max. memory is 7.1 GB. [2020-08-18 21:15:55,115 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 141.6 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.7 kB). Peak memory consumption was 209.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 278.16 ms. Allocated memory is still 141.6 MB. Free memory was 102.4 MB in the beginning and 92.6 MB in the end (delta: 9.9 MB). Peak memory consumption was 9.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 127.00 ms. Allocated memory was 141.6 MB in the beginning and 201.9 MB in the end (delta: 60.3 MB). Free memory was 92.6 MB in the beginning and 179.5 MB in the end (delta: -86.9 MB). Peak memory consumption was 11.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 299.43 ms. Allocated memory is still 201.9 MB. Free memory was 179.5 MB in the beginning and 165.9 MB in the end (delta: 13.6 MB). Peak memory consumption was 13.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 28417.19 ms. Allocated memory was 201.9 MB in the beginning and 266.9 MB in the end (delta: 65.0 MB). Free memory was 165.2 MB in the beginning and 217.9 MB in the end (delta: -52.6 MB). Peak memory consumption was 12.4 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: 19]: Loop Invariant Derived loop invariant: (!(SIZE <= 20000001) || (i + j + k + v4 <= l && l <= i + j + k + v4)) || !(20000001 <= SIZE) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 28.1s, OverallIterations: 9, TraceHistogramMax: 3, AutomataDifference: 20.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.1s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 100 SDtfs, 270 SDslu, 225 SDs, 0 SdLazy, 610 SolverSat, 87 SolverUnsat, 8 SolverUnknown, 0 SolverNotchecked, 17.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 123 GetRequests, 27 SyntacticMatches, 8 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 8.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=8, 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, 9 MinimizatonAttempts, 29 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 17 PreInvPairs, 25 NumberOfFragments, 105 HoareAnnotationTreeSize, 17 FomulaSimplifications, 611 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 92 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 6.6s InterpolantComputationTime, 176 NumberOfCodeBlocks, 176 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 167 ConstructedInterpolants, 0 QuantifiedInterpolants, 35421 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 2 PerfectInterpolantSequences, 33/60 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...