/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=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 22:18:14,494 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 22:18:14,498 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 22:18:14,540 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 22:18:14,540 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 22:18:14,549 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 22:18:14,551 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 22:18:14,553 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 22:18:14,556 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 22:18:14,558 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 22:18:14,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 22:18:14,561 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 22:18:14,561 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 22:18:14,564 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 22:18:14,565 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 22:18:14,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 22:18:14,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 22:18:14,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 22:18:14,572 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 22:18:14,578 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 22:18:14,579 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 22:18:14,581 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 22:18:14,581 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 22:18:14,582 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 22:18:14,594 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 22:18:14,610 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 22:18:14,611 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 22:18:14,612 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 22:18:14,612 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 [2020-08-21 22:18:14,634 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 22:18:14,634 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 22:18:14,635 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 22:18:14,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 22:18:14,636 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 22:18:14,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 22:18:14,636 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 22:18:14,636 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 22:18:14,637 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 22:18:14,637 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 22:18:14,637 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 22:18:14,637 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 22:18:14,637 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 22:18:14,638 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 22:18:14,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 22:18:14,638 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 22:18:14,638 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 22:18:14,638 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 22:18:14,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 22:18:14,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 22:18:14,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 22:18:14,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 22:18:14,639 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 22:18:14,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 22:18:14,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 22:18:14,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 22:18:14,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 22:18:14,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 22:18:14,640 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 22:18:14,641 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=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDEST;log-additional-information=true; [2020-08-21 22:18:14,916 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 22:18:14,933 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 22:18:14,936 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 22:18:14,937 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 22:18:14,938 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 22:18:14,938 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-21 22:18:14,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c00d6ed9/31ba4a97daa74e73adc2dcabd1feb4ce/FLAG4c4080983 [2020-08-21 22:18:15,452 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 22:18:15,453 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/array_3-1.i [2020-08-21 22:18:15,460 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c00d6ed9/31ba4a97daa74e73adc2dcabd1feb4ce/FLAG4c4080983 [2020-08-21 22:18:15,854 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/3c00d6ed9/31ba4a97daa74e73adc2dcabd1feb4ce [2020-08-21 22:18:15,863 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 22:18:15,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 22:18:15,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 22:18:15,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 22:18:15,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 22:18:15,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:18:15" (1/1) ... [2020-08-21 22:18:15,873 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@532b1c07 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:15, skipping insertion in model container [2020-08-21 22:18:15,873 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 10:18:15" (1/1) ... [2020-08-21 22:18:15,881 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 22:18:15,897 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 22:18:16,064 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:18:16,068 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 22:18:16,089 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 22:18:16,109 INFO L208 MainTranslator]: Completed translation [2020-08-21 22:18:16,109 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16 WrapperNode [2020-08-21 22:18:16,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 22:18:16,110 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 22:18:16,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 22:18:16,111 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 22:18:16,206 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (1/1) ... [2020-08-21 22:18:16,208 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (1/1) ... [2020-08-21 22:18:16,217 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (1/1) ... [2020-08-21 22:18:16,217 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (1/1) ... [2020-08-21 22:18:16,229 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (1/1) ... [2020-08-21 22:18:16,234 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (1/1) ... [2020-08-21 22:18:16,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (1/1) ... [2020-08-21 22:18:16,246 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 22:18:16,246 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 22:18:16,246 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 22:18:16,246 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 22:18:16,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (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 [2020-08-21 22:18:16,303 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 22:18:16,304 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 22:18:16,304 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 22:18:16,304 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 22:18:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 22:18:16,304 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 22:18:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 22:18:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 22:18:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 22:18:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 22:18:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 22:18:16,305 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 22:18:16,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 22:18:16,306 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 22:18:16,550 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 22:18:16,551 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-21 22:18:16,555 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:18:16 BoogieIcfgContainer [2020-08-21 22:18:16,555 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 22:18:16,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 22:18:16,556 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 22:18:16,559 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 22:18:16,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 10:18:15" (1/3) ... [2020-08-21 22:18:16,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4ac2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:18:16, skipping insertion in model container [2020-08-21 22:18:16,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 10:18:16" (2/3) ... [2020-08-21 22:18:16,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c4ac2f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 10:18:16, skipping insertion in model container [2020-08-21 22:18:16,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 10:18:16" (3/3) ... [2020-08-21 22:18:16,563 INFO L109 eAbstractionObserver]: Analyzing ICFG array_3-1.i [2020-08-21 22:18:16,574 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 22:18:16,581 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 22:18:16,595 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 22:18:16,619 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 22:18:16,620 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 22:18:16,620 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 22:18:16,620 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 22:18:16,620 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 22:18:16,620 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 22:18:16,620 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 22:18:16,621 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 22:18:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-08-21 22:18:16,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-08-21 22:18:16,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:16,646 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:16,646 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:16,652 INFO L82 PathProgramCache]: Analyzing trace with hash -413900697, now seen corresponding path program 1 times [2020-08-21 22:18:16,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:16,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968350270] [2020-08-21 22:18:16,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:16,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:16,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:18:16,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968350270] [2020-08-21 22:18:16,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:18:16,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 22:18:16,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957769589] [2020-08-21 22:18:16,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 22:18:16,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:16,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 22:18:16,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:18:16,924 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-08-21 22:18:17,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:17,020 INFO L93 Difference]: Finished difference Result 42 states and 51 transitions. [2020-08-21 22:18:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 22:18:17,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2020-08-21 22:18:17,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:17,030 INFO L225 Difference]: With dead ends: 42 [2020-08-21 22:18:17,030 INFO L226 Difference]: Without dead ends: 18 [2020-08-21 22:18:17,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 22:18:17,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-08-21 22:18:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2020-08-21 22:18:17,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2020-08-21 22:18:17,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2020-08-21 22:18:17,076 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2020-08-21 22:18:17,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:17,077 INFO L479 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2020-08-21 22:18:17,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 22:18:17,077 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2020-08-21 22:18:17,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 22:18:17,078 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:17,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:17,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 22:18:17,079 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:17,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:17,080 INFO L82 PathProgramCache]: Analyzing trace with hash 2053026861, now seen corresponding path program 1 times [2020-08-21 22:18:17,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:17,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228257720] [2020-08-21 22:18:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:17,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:17,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:17,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:17,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:18:17,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228257720] [2020-08-21 22:18:17,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:18:17,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 22:18:17,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120514228] [2020-08-21 22:18:17,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 22:18:17,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:17,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 22:18:17,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:18:17,165 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 4 states. [2020-08-21 22:18:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:17,239 INFO L93 Difference]: Finished difference Result 35 states and 41 transitions. [2020-08-21 22:18:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 22:18:17,240 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 22:18:17,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:17,243 INFO L225 Difference]: With dead ends: 35 [2020-08-21 22:18:17,243 INFO L226 Difference]: Without dead ends: 25 [2020-08-21 22:18:17,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 22:18:17,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-08-21 22:18:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-08-21 22:18:17,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-08-21 22:18:17,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-08-21 22:18:17,252 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2020-08-21 22:18:17,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:17,252 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-08-21 22:18:17,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 22:18:17,253 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-08-21 22:18:17,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 22:18:17,253 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:17,254 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:17,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 22:18:17,254 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:17,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:17,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1766388751, now seen corresponding path program 1 times [2020-08-21 22:18:17,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:17,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153184971] [2020-08-21 22:18:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:17,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:17,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:17,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:17,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:18:17,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153184971] [2020-08-21 22:18:17,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:17,324 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 22:18:17,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494322797] [2020-08-21 22:18:17,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 22:18:17,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:17,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 22:18:17,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:18:17,328 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 5 states. [2020-08-21 22:18:17,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:17,415 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2020-08-21 22:18:17,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 22:18:17,415 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 22:18:17,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:17,417 INFO L225 Difference]: With dead ends: 45 [2020-08-21 22:18:17,417 INFO L226 Difference]: Without dead ends: 32 [2020-08-21 22:18:17,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 22:18:17,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-21 22:18:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 28. [2020-08-21 22:18:17,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-21 22:18:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-21 22:18:17,425 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 16 [2020-08-21 22:18:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:17,425 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-21 22:18:17,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 22:18:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-21 22:18:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 22:18:17,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:17,426 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:17,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 22:18:17,427 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:17,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1185071985, now seen corresponding path program 2 times [2020-08-21 22:18:17,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:17,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215202844] [2020-08-21 22:18:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:17,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:18:17,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215202844] [2020-08-21 22:18:17,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:17,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 22:18:17,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023339914] [2020-08-21 22:18:17,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:18:17,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:17,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:18:17,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:18:17,556 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-21 22:18:17,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:17,684 INFO L93 Difference]: Finished difference Result 56 states and 66 transitions. [2020-08-21 22:18:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:18:17,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 22:18:17,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:17,686 INFO L225 Difference]: With dead ends: 56 [2020-08-21 22:18:17,686 INFO L226 Difference]: Without dead ends: 39 [2020-08-21 22:18:17,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:18:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-08-21 22:18:17,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2020-08-21 22:18:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-08-21 22:18:17,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2020-08-21 22:18:17,695 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 18 [2020-08-21 22:18:17,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:17,696 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2020-08-21 22:18:17,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:18:17,696 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2020-08-21 22:18:17,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 22:18:17,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:17,697 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:17,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 22:18:17,698 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:17,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:17,698 INFO L82 PathProgramCache]: Analyzing trace with hash 885408339, now seen corresponding path program 3 times [2020-08-21 22:18:17,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:17,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2051270377] [2020-08-21 22:18:17,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:17,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:17,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:17,795 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 22:18:17,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2051270377] [2020-08-21 22:18:17,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:17,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:18:17,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084280010] [2020-08-21 22:18:17,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:18:17,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:17,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:18:17,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:18:17,797 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand 7 states. [2020-08-21 22:18:17,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:17,900 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-08-21 22:18:17,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:18:17,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 22:18:17,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:17,902 INFO L225 Difference]: With dead ends: 67 [2020-08-21 22:18:17,902 INFO L226 Difference]: Without dead ends: 46 [2020-08-21 22:18:17,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:18:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-21 22:18:17,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 40. [2020-08-21 22:18:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 22:18:17,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-08-21 22:18:17,911 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 20 [2020-08-21 22:18:17,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:17,911 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-08-21 22:18:17,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:18:17,911 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-08-21 22:18:17,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 22:18:17,912 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:17,912 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:17,913 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 22:18:17,913 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:17,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:17,913 INFO L82 PathProgramCache]: Analyzing trace with hash 671453365, now seen corresponding path program 4 times [2020-08-21 22:18:17,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:17,914 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178487869] [2020-08-21 22:18:17,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:17,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:18,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,008 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 22:18:18,008 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178487869] [2020-08-21 22:18:18,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:18:18,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 22:18:18,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301357448] [2020-08-21 22:18:18,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 22:18:18,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:18,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 22:18:18,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 22:18:18,010 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 6 states. [2020-08-21 22:18:18,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:18,090 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2020-08-21 22:18:18,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 22:18:18,091 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-08-21 22:18:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:18,093 INFO L225 Difference]: With dead ends: 45 [2020-08-21 22:18:18,093 INFO L226 Difference]: Without dead ends: 40 [2020-08-21 22:18:18,094 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:18:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-21 22:18:18,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-08-21 22:18:18,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-08-21 22:18:18,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-08-21 22:18:18,101 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 22 [2020-08-21 22:18:18,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:18,102 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-08-21 22:18:18,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 22:18:18,102 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-08-21 22:18:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 22:18:18,103 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:18,103 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:18,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 22:18:18,104 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:18,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:18,104 INFO L82 PathProgramCache]: Analyzing trace with hash 1732065724, now seen corresponding path program 1 times [2020-08-21 22:18:18,104 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:18,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557142591] [2020-08-21 22:18:18,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:18,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,177 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:18:18,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557142591] [2020-08-21 22:18:18,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:18,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-21 22:18:18,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504528890] [2020-08-21 22:18:18,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-21 22:18:18,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:18,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-21 22:18:18,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:18:18,180 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 8 states. [2020-08-21 22:18:18,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:18,283 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2020-08-21 22:18:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 22:18:18,284 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-08-21 22:18:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:18,285 INFO L225 Difference]: With dead ends: 77 [2020-08-21 22:18:18,285 INFO L226 Difference]: Without dead ends: 52 [2020-08-21 22:18:18,286 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-08-21 22:18:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-21 22:18:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2020-08-21 22:18:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 22:18:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2020-08-21 22:18:18,293 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 26 [2020-08-21 22:18:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:18,294 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2020-08-21 22:18:18,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-21 22:18:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2020-08-21 22:18:18,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 22:18:18,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:18,295 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:18,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 22:18:18,296 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:18,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:18,296 INFO L82 PathProgramCache]: Analyzing trace with hash 359446174, now seen corresponding path program 2 times [2020-08-21 22:18:18,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:18,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522424048] [2020-08-21 22:18:18,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:18,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:18:18,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522424048] [2020-08-21 22:18:18,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:18,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 22:18:18,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84451524] [2020-08-21 22:18:18,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 22:18:18,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:18,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 22:18:18,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:18:18,390 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand 9 states. [2020-08-21 22:18:18,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:18,518 INFO L93 Difference]: Finished difference Result 88 states and 102 transitions. [2020-08-21 22:18:18,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-21 22:18:18,519 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-08-21 22:18:18,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:18,520 INFO L225 Difference]: With dead ends: 88 [2020-08-21 22:18:18,520 INFO L226 Difference]: Without dead ends: 59 [2020-08-21 22:18:18,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:18:18,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-08-21 22:18:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 52. [2020-08-21 22:18:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-08-21 22:18:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 59 transitions. [2020-08-21 22:18:18,528 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 59 transitions. Word has length 28 [2020-08-21 22:18:18,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:18,529 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 59 transitions. [2020-08-21 22:18:18,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 22:18:18,529 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 59 transitions. [2020-08-21 22:18:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-21 22:18:18,530 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:18,530 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:18,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 22:18:18,531 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:18,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:18,531 INFO L82 PathProgramCache]: Analyzing trace with hash -172981504, now seen corresponding path program 3 times [2020-08-21 22:18:18,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:18,535 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810701031] [2020-08-21 22:18:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:18,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:18:18,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810701031] [2020-08-21 22:18:18,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:18,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 22:18:18,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168624674] [2020-08-21 22:18:18,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 22:18:18,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:18,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 22:18:18,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:18:18,642 INFO L87 Difference]: Start difference. First operand 52 states and 59 transitions. Second operand 10 states. [2020-08-21 22:18:18,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:18,793 INFO L93 Difference]: Finished difference Result 99 states and 115 transitions. [2020-08-21 22:18:18,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-21 22:18:18,794 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-08-21 22:18:18,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:18,795 INFO L225 Difference]: With dead ends: 99 [2020-08-21 22:18:18,795 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 22:18:18,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-08-21 22:18:18,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 22:18:18,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 58. [2020-08-21 22:18:18,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-21 22:18:18,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 66 transitions. [2020-08-21 22:18:18,803 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 66 transitions. Word has length 30 [2020-08-21 22:18:18,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:18,803 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 66 transitions. [2020-08-21 22:18:18,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 22:18:18,803 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 66 transitions. [2020-08-21 22:18:18,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-21 22:18:18,804 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:18,805 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:18,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 22:18:18,805 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:18,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:18,805 INFO L82 PathProgramCache]: Analyzing trace with hash -734871838, now seen corresponding path program 4 times [2020-08-21 22:18:18,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:18,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818772798] [2020-08-21 22:18:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:18,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:18,897 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:18:18,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818772798] [2020-08-21 22:18:18,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:18,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 22:18:18,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956345048] [2020-08-21 22:18:18,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 22:18:18,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 22:18:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:18:18,899 INFO L87 Difference]: Start difference. First operand 58 states and 66 transitions. Second operand 11 states. [2020-08-21 22:18:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:19,019 INFO L93 Difference]: Finished difference Result 110 states and 128 transitions. [2020-08-21 22:18:19,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 22:18:19,021 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-08-21 22:18:19,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:19,024 INFO L225 Difference]: With dead ends: 110 [2020-08-21 22:18:19,024 INFO L226 Difference]: Without dead ends: 73 [2020-08-21 22:18:19,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-08-21 22:18:19,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-08-21 22:18:19,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 64. [2020-08-21 22:18:19,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 22:18:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-08-21 22:18:19,037 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 32 [2020-08-21 22:18:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:19,037 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-08-21 22:18:19,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 22:18:19,038 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-08-21 22:18:19,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-21 22:18:19,040 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:19,040 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:19,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 22:18:19,043 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:19,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:19,044 INFO L82 PathProgramCache]: Analyzing trace with hash 454396484, now seen corresponding path program 5 times [2020-08-21 22:18:19,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:19,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827994882] [2020-08-21 22:18:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:19,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:19,209 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:18:19,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827994882] [2020-08-21 22:18:19,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:19,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 22:18:19,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730031966] [2020-08-21 22:18:19,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 22:18:19,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:19,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 22:18:19,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:18:19,212 INFO L87 Difference]: Start difference. First operand 64 states and 73 transitions. Second operand 12 states. [2020-08-21 22:18:19,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:19,353 INFO L93 Difference]: Finished difference Result 121 states and 141 transitions. [2020-08-21 22:18:19,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 22:18:19,354 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-08-21 22:18:19,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:19,355 INFO L225 Difference]: With dead ends: 121 [2020-08-21 22:18:19,355 INFO L226 Difference]: Without dead ends: 80 [2020-08-21 22:18:19,356 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-08-21 22:18:19,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-21 22:18:19,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-08-21 22:18:19,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 22:18:19,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 80 transitions. [2020-08-21 22:18:19,363 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 80 transitions. Word has length 34 [2020-08-21 22:18:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:19,363 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 80 transitions. [2020-08-21 22:18:19,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 22:18:19,364 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 80 transitions. [2020-08-21 22:18:19,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-21 22:18:19,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:19,365 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:19,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 22:18:19,365 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:19,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:19,366 INFO L82 PathProgramCache]: Analyzing trace with hash 879953190, now seen corresponding path program 6 times [2020-08-21 22:18:19,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:19,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674292909] [2020-08-21 22:18:19,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:19,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:19,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:19,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:19,486 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:18:19,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674292909] [2020-08-21 22:18:19,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:19,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 22:18:19,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547717312] [2020-08-21 22:18:19,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 22:18:19,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:19,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 22:18:19,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:18:19,489 INFO L87 Difference]: Start difference. First operand 70 states and 80 transitions. Second operand 13 states. [2020-08-21 22:18:19,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:19,650 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2020-08-21 22:18:19,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 22:18:19,651 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-08-21 22:18:19,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:19,652 INFO L225 Difference]: With dead ends: 132 [2020-08-21 22:18:19,653 INFO L226 Difference]: Without dead ends: 87 [2020-08-21 22:18:19,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-08-21 22:18:19,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-08-21 22:18:19,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-08-21 22:18:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-21 22:18:19,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 87 transitions. [2020-08-21 22:18:19,668 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 87 transitions. Word has length 36 [2020-08-21 22:18:19,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:19,669 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 87 transitions. [2020-08-21 22:18:19,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 22:18:19,669 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 87 transitions. [2020-08-21 22:18:19,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-21 22:18:19,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:19,670 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:19,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 22:18:19,670 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:19,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:19,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1818054536, now seen corresponding path program 7 times [2020-08-21 22:18:19,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:19,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851799270] [2020-08-21 22:18:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:19,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:19,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:19,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:19,811 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:18:19,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851799270] [2020-08-21 22:18:19,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:19,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 22:18:19,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048332660] [2020-08-21 22:18:19,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 22:18:19,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:19,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 22:18:19,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:18:19,814 INFO L87 Difference]: Start difference. First operand 76 states and 87 transitions. Second operand 14 states. [2020-08-21 22:18:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:19,971 INFO L93 Difference]: Finished difference Result 143 states and 167 transitions. [2020-08-21 22:18:19,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 22:18:19,972 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-08-21 22:18:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:19,973 INFO L225 Difference]: With dead ends: 143 [2020-08-21 22:18:19,973 INFO L226 Difference]: Without dead ends: 94 [2020-08-21 22:18:19,974 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-08-21 22:18:19,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-21 22:18:19,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 82. [2020-08-21 22:18:19,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-08-21 22:18:19,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 94 transitions. [2020-08-21 22:18:19,979 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 94 transitions. Word has length 38 [2020-08-21 22:18:19,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:19,980 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 94 transitions. [2020-08-21 22:18:19,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 22:18:19,980 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 94 transitions. [2020-08-21 22:18:19,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-08-21 22:18:19,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:19,981 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:19,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 22:18:19,981 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:19,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:19,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1390315882, now seen corresponding path program 8 times [2020-08-21 22:18:19,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:19,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4386168] [2020-08-21 22:18:19,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:19,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:20,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:20,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:20,125 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-08-21 22:18:20,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4386168] [2020-08-21 22:18:20,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:20,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 22:18:20,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973745939] [2020-08-21 22:18:20,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 22:18:20,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:20,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 22:18:20,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:18:20,128 INFO L87 Difference]: Start difference. First operand 82 states and 94 transitions. Second operand 15 states. [2020-08-21 22:18:20,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:20,307 INFO L93 Difference]: Finished difference Result 154 states and 180 transitions. [2020-08-21 22:18:20,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 22:18:20,308 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-08-21 22:18:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:20,309 INFO L225 Difference]: With dead ends: 154 [2020-08-21 22:18:20,309 INFO L226 Difference]: Without dead ends: 101 [2020-08-21 22:18:20,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-08-21 22:18:20,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-08-21 22:18:20,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 88. [2020-08-21 22:18:20,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 22:18:20,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 101 transitions. [2020-08-21 22:18:20,330 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 101 transitions. Word has length 40 [2020-08-21 22:18:20,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:20,330 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 101 transitions. [2020-08-21 22:18:20,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 22:18:20,331 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 101 transitions. [2020-08-21 22:18:20,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-08-21 22:18:20,334 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:20,334 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:20,335 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 22:18:20,335 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:20,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:20,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1644637492, now seen corresponding path program 9 times [2020-08-21 22:18:20,336 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:20,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878571123] [2020-08-21 22:18:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:20,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:20,427 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2020-08-21 22:18:20,428 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878571123] [2020-08-21 22:18:20,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 22:18:20,428 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 22:18:20,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418093026] [2020-08-21 22:18:20,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:18:20,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:20,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:18:20,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:18:20,430 INFO L87 Difference]: Start difference. First operand 88 states and 101 transitions. Second operand 7 states. [2020-08-21 22:18:20,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:20,549 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2020-08-21 22:18:20,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:18:20,549 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-08-21 22:18:20,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:20,551 INFO L225 Difference]: With dead ends: 93 [2020-08-21 22:18:20,551 INFO L226 Difference]: Without dead ends: 88 [2020-08-21 22:18:20,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:18:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-21 22:18:20,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-08-21 22:18:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 22:18:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 100 transitions. [2020-08-21 22:18:20,556 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 100 transitions. Word has length 42 [2020-08-21 22:18:20,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:20,556 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 100 transitions. [2020-08-21 22:18:20,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:18:20,557 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 100 transitions. [2020-08-21 22:18:20,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-21 22:18:20,557 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 22:18:20,557 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 22:18:20,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 22:18:20,558 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 22:18:20,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 22:18:20,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1325635667, now seen corresponding path program 10 times [2020-08-21 22:18:20,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 22:18:20,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233765542] [2020-08-21 22:18:20,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 22:18:20,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:20,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 22:18:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 22:18:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-08-21 22:18:20,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233765542] [2020-08-21 22:18:20,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 22:18:20,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 22:18:20,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960267661] [2020-08-21 22:18:20,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 22:18:20,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 22:18:20,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 22:18:20,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-21 22:18:20,629 INFO L87 Difference]: Start difference. First operand 88 states and 100 transitions. Second operand 7 states. [2020-08-21 22:18:20,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 22:18:20,698 INFO L93 Difference]: Finished difference Result 88 states and 100 transitions. [2020-08-21 22:18:20,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 22:18:20,699 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-08-21 22:18:20,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 22:18:20,699 INFO L225 Difference]: With dead ends: 88 [2020-08-21 22:18:20,700 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 22:18:20,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-08-21 22:18:20,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 22:18:20,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 22:18:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 22:18:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 22:18:20,701 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 46 [2020-08-21 22:18:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 22:18:20,701 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 22:18:20,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 22:18:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 22:18:20,702 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 22:18:20,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 22:18:20,705 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 22:18:20,786 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:18:20,786 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |#NULL.base| |old(#NULL.base)|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-21 22:18:20,786 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:18:20,786 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 22:18:20,786 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 22:18:20,787 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 22:18:20,787 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 22:18:20,787 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 9 23) no Hoare annotation was computed. [2020-08-21 22:18:20,787 INFO L268 CegarLoopResult]: For program point L17-1(lines 17 21) no Hoare annotation was computed. [2020-08-21 22:18:20,787 INFO L268 CegarLoopResult]: For program point L17-3(lines 17 21) no Hoare annotation was computed. [2020-08-21 22:18:20,787 INFO L264 CegarLoopResult]: At program point L17-4(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-08-21 22:18:20,787 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 9 23) no Hoare annotation was computed. [2020-08-21 22:18:20,787 INFO L264 CegarLoopResult]: At program point L17-5(lines 17 21) the Hoare annotation is: (<= main_~i~0 1023) [2020-08-21 22:18:20,788 INFO L268 CegarLoopResult]: For program point L13-2(lines 13 15) no Hoare annotation was computed. [2020-08-21 22:18:20,790 INFO L271 CegarLoopResult]: At program point L13-3(lines 13 15) the Hoare annotation is: true [2020-08-21 22:18:20,791 INFO L268 CegarLoopResult]: For program point L13-4(lines 13 15) no Hoare annotation was computed. [2020-08-21 22:18:20,791 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 9 23) the Hoare annotation is: (= |old(#valid)| |#valid|) [2020-08-21 22:18:20,791 INFO L268 CegarLoopResult]: For program point L22(line 22) no Hoare annotation was computed. [2020-08-21 22:18:20,791 INFO L268 CegarLoopResult]: For program point L18(lines 18 20) no Hoare annotation was computed. [2020-08-21 22:18:20,791 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 3 8) the Hoare annotation is: true [2020-08-21 22:18:20,791 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 3 8) no Hoare annotation was computed. [2020-08-21 22:18:20,791 INFO L268 CegarLoopResult]: For program point L5(line 5) no Hoare annotation was computed. [2020-08-21 22:18:20,791 INFO L268 CegarLoopResult]: For program point L4(lines 4 6) no Hoare annotation was computed. [2020-08-21 22:18:20,792 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 5) no Hoare annotation was computed. [2020-08-21 22:18:20,792 INFO L268 CegarLoopResult]: For program point L4-2(lines 3 8) no Hoare annotation was computed. [2020-08-21 22:18:20,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 10:18:20 BoogieIcfgContainer [2020-08-21 22:18:20,827 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 22:18:20,830 INFO L168 Benchmark]: Toolchain (without parser) took 4964.19 ms. Allocated memory was 140.5 MB in the beginning and 279.4 MB in the end (delta: 138.9 MB). Free memory was 103.5 MB in the beginning and 205.5 MB in the end (delta: -102.1 MB). Peak memory consumption was 36.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:18:20,833 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 22:18:20,835 INFO L168 Benchmark]: CACSL2BoogieTranslator took 244.32 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-08-21 22:18:20,837 INFO L168 Benchmark]: Boogie Preprocessor took 135.51 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. [2020-08-21 22:18:20,839 INFO L168 Benchmark]: RCFGBuilder took 308.94 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 166.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-08-21 22:18:20,840 INFO L168 Benchmark]: TraceAbstraction took 4270.63 ms. Allocated memory was 203.4 MB in the beginning and 279.4 MB in the end (delta: 76.0 MB). Free memory was 166.3 MB in the beginning and 205.5 MB in the end (delta: -39.3 MB). Peak memory consumption was 36.8 MB. Max. memory is 7.1 GB. [2020-08-21 22:18:20,843 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 244.32 ms. Allocated memory is still 140.5 MB. Free memory was 103.0 MB in the beginning and 93.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 135.51 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 93.3 MB in the beginning and 181.4 MB in the end (delta: -88.1 MB). Peak memory consumption was 12.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 308.94 ms. Allocated memory is still 203.4 MB. Free memory was 180.8 MB in the beginning and 166.9 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4270.63 ms. Allocated memory was 203.4 MB in the beginning and 279.4 MB in the end (delta: 76.0 MB). Free memory was 166.3 MB in the beginning and 205.5 MB in the end (delta: -39.3 MB). Peak memory consumption was 36.8 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 5]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 17]: Loop Invariant Derived loop invariant: i <= 1023 - InvariantResult [Line: 13]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.0s, OverallIterations: 16, TraceHistogramMax: 12, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 214 SDtfs, 505 SDslu, 593 SDs, 0 SdLazy, 1177 SolverSat, 232 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 159 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 16 MinimizatonAttempts, 94 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 8 LocationsWithAnnotation, 23 PreInvPairs, 51 NumberOfFragments, 23 HoareAnnotationTreeSize, 23 FomulaSimplifications, 77 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 8 FomulaSimplificationsInter, 39 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 455 NumberOfCodeBlocks, 455 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 439 ConstructedInterpolants, 0 QuantifiedInterpolants, 28428 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 16 InterpolantComputations, 4 PerfectInterpolantSequences, 328/836 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...